Then we showed how, while using SQL Server, converting a string to date can be achieved using these approaches. We explained the system functions provided by SQL Server by giving some examples and external links that provide more details. For example, you can have it returned as dd.mm.yyyy, yyyy-mm-dd, dd mon yyyy, etc SQL SERVER - Multiple ways to remove Milliseconds from Datetime (Truncate Datetime till Second) | SQL Server Portal. Recently, the client showed me the following code where when they try to convert the empty string to date time, it was automatically converted to year 1900-01 . Unfortunately, there is no direct way through which we can convert a string to yyyymmdd date format in SQL Server. So Cast(), in SQL Server is a conversion function that is used to transform an expression from one data type to another. In general, there are two types of data type conversions: In this article, we will explain how a string to date conversion can be achieved implicitly, or explicitly in SQL Server using built-in functions such as CAST(), TRY_CAST(), CONVERT(), TRY_CONVERT() and TRY_PARSE(). Related Reading: STUFF (Transact-SQL) So in the given employee table, we have a Joining Date Column which contains varchar values representing date and time. And it has the following syntax. The other possibility is that the column contains a value which . But, if we switch the day and month parts, it will succeed: You can check out this official documentation here to learn more about how to change SQL Server language settings. Did neanderthals need vitamin C from the diet? Code language: SQL (Structured Query Language) (sql) Converting a string in ANSI/ISO and US date format to a datetime. Does a 120cc engine burn 120cc of fuel a minute? And then, we are using the new date result within the Convert() function to get the required format result. In the last, we are using the comparison operator to filter out the result. This example shows how to use the CONVERT() function to convert strings in ISO date format to datetime values: Is this possible in SQL , in PL/SQL we have execute immediate, but not sure in SQL.The reason the above won't work is that the lambda expressions get types Func<string, DateTime> and Func<string, string> etc. But, if we pass AR-LB as culture (Arabic Lebanon), where dd/MM/yyyy is supported, the conversion succeeds: One of the main issues of the data type conversion functions is that they cannot handle the erroneous value. For conversion, we have to first convert the string to a standard date format, and then we have to convert the standard date to a varchar data type. After this, we are using the DateTime variable in the Convert() function to extract 2 parts. And in the Convert() function, we are using the Cast() to first change the string data type to date, and then we are using the date expression to convert into varchar. To my dismay, the field's value was a string in Unix epoch time - a value representing the number of seconds since January 1, 1970. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. With century. And if we try to convert a non supported string format, it will raise an error. And then, we can use the Convert() function to format the date according to our requirements. Converting a string to a datetime value is a common requirement. Why does the distance from light to subject affect exposure (inverse square law) while from subject to lens does not? The Cast() function accepts 2 arguments, the first is the expression that represents a valid value, and the second is the resulting data type that a user wants. Read SQL Operand data type real is invalid for modulo operator. In SQL Server, you can use CONVERT or TRY_CONVERT function with an appropriate datetime style. How do I perform an IFTHEN in an SQL SELECT? SQL Server examples of string to datetime conversions. For an error-free conversion, we have to provide the supported format (mm/dd/yyyy) as shown below. Also, he published several article series about Biml, SSIS features, Search engines, Hadoop, and many other technologies. Most of our readers are from the United States, Canada, United Kingdom, Australia, New Zealand, etc. Converting these values to a date data type is very important since dates may be more valuable during analysis. In the query above, we are converting the string to a date data type by using the Cast() function. This example converts a string to a datetime value. Sign up and we'll send you the best freelance opportunities straight to Just to mention this: Be aware of the language dependency. CONVERT and TRY_CONVERT accept a variety of date formats. CONVERT and TRY_CONVERT can convert string values to datetime. Oracle : -- Specify a datetime string and its exact format SELECT TO_DATE ('2012-06-05', 'YYYY-MM-DD') FROM dual; SQL Server : -- Convert the current date to YYYY-MM-DD format SELECT TO_CHAR ( SYSDATE, 'YYYY-MM-DD . However, sometimes the disconnect between the input string and the specified style is too far apart. In the query, first, we have declared a DateTime variable, and for the variable value, we are converting the input string to a DateTime value by using the Convert() function. These are valid style values with associated datetime string formats. CONVERT returns an error when a conversion error occurs. You can read more in the SQL Server documentation. .NET? And in the Parse() function, we have given the input string as 16 June 2021, and we also defined the data type to be a date. to a string using the specified format. to a string. Does integrating PDOS give total charge of a system? Find centralized, trusted content and collaborate around the technologies you use most. But we can convert it implicitly. PARSE() syntax is as follows: PARSE( AS [USING ]). style. I'm not sure that SQL Server can directly convert your datetime string. These are valid style values with associated datetime string formats. In SQL Server, there are many conversion functions available through which we can easily convert an expression of one data type to another. 1. Note: Before we start, please note that some of the SQL statements used are meaningless from the data context perspective and are just used to explain the concept. your inbox. What happens if you score more than 99 points in volleyball? Appealing a verdict due to the lawyers being incompetent and or failing to follow instructions? There you can find, that the closest date format is indicated by 100: It's your format except it doesn't include unnecessary in this case day of week information. The date uses a 2 digit year, so SQL Server could assume the wrong century. CONVERT() function is more advanced than CAST() since the conversion style can be specified. please help to solve this Convert String in SQL server table to Datetime and use in Select Query System.formatexception: 'the string was not recognized as a valid datetime. Did the apostolic or early church fathers acknowledge Papal infallibility? Applies to: SQL Server (all supported versions) Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) Defines a date that is combined with a time of a day based on a 24-hour clock like datetime2, and adds time zone awareness based on UTC (Universal Time Coordinate or Greenwich Mean Time). Lets understand the implementation with the help of an example. Now consider the following sample employee table in SQL Server. This approach will work if your string is always the same length and format, and it works from the end of the string to the start to produce a value in this format: YYYYMMDD HH:MM:SS. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. The syntax goes like this: CONVERT ( data_type [ ( length ) ] , expression [ , style ] ) The style in the above syntax is an optional parameter used to define the resulting expression format. Summary: in this tutorial, you will learn how to convert datetime to string in SQL Server using the CONVERT() function. I have done my share in converting string to date in SQL Server 2016 but never seen a date with the format like the one below. SELECT CONVERT(date, '20 Dec 2018') AS Result; Result: datetime -- indicates that the specified string-value will be converted to datetime. | GDPR | Terms of Use | Privacy, Hadi is an SQL Server professional with more than 10 years of experience. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. To learn more, see our tips on writing great answers. If we assume that the value is always in the format MMM-yy then you could do this: SELECT CONVERT (date,'01-' + StringDate,106) FROM dbo.YourTable; Of course, this has 2 flaws. So if you need to convert a string to a date/time value, you can use the CONVERT() function or the CAST() function. Now we have proper date format, since it says that it's default, we don't need to supply 100 to convert function and also we can use cast function instead, as you discovered, so we could do: Thanks for contributing an answer to Stack Overflow! To get the desired result, we are using the 103 style code. SELECT TRY_CONVERT(datetime, '2022-11-01 05:29 PM', 0) AS 'mon dd yyyy hh:miAM/PM)', TRY_CONVERT(datetime, '2022-11-01 05:29 . And in the Convert() function, we have given the input expression as 16 June 2021, and we also defined the data type to be a date. In SQL Server, we can even convert a string column to date within a WHERE clause by using any of the available conversion functions. TRY_CONVERT returns NULL when a conversion error occurs. Note that in SQL Server, converting a string to date using CAST() function depends on the language settings similar to implicit conversion, as we mentioned in the previous section, so you can only convert ISO formats or supported formats by the current language settings. 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Since one seems to be a Date and the other a string, the server has to convert them to a common type.. UNION and UNION ALL work on result fields by position, not subquery aliases. The conversion of a varchar data type to a datetime data type resulted in an out-of-range value. This is how to convert string to date with a different format in SQL Server 2019. If you see the "cross", you're on the right track. Its critical to convert these information to a date data type because dates may be more useful during analysis. Try this: SELECT CONVERT (datetime2, '25/05/2016 09:00', 103) The convert method takes 3 arguments: The first is the target data type, the second is the expression to convert, and the third is the style. CAST() is the most basic conversion function provided by SQL Server. The query will return the following result. From the first Convert() function, we are extracting the date part (YYYYMMDD), and from the second Convert() function, we are extracting the timing part (HH:MM: SS). The value of style is a number predefined by SQL Server. In the above query, we are using the Cast() function within the SELECT statement. Making statements based on opinion; back them up with references or personal experience. SQL server date format and converting it (Various examples) - QA With Experts. CONVERT(varchar, datetime-value [, style]) varchar -- specifies that the datetime value will be converted to a string value. After this, use another Convert () function to get the hh:mm:ss string from the DateTime value. Syntax of the CONVERT function. This is how to convert String to Date yyyymmdd in SQL Server 2019. And in the Convert() function, we have defined the style parameter as 112 to get the date in yyyymmdd format. SQL Server Convert String to Date + Examples - SQL Server Guides. Read: SQL Server Convert Datetime to date + Examples. But, if the style argument is passed, it will try to convert the value based on that style. For example, GETDATE (): It returns server datetime in "YYYY-MM-DD HH:mm:ss.fff" format. In the above query, we are using the SELECT statement to select all the columns from the table. Execute the following T-SQL scripts in Microsoft SQL Server Management Studio (SSMS) Query Editor to demonstrate T-SQL CONVERT and CAST functions in transforming string SQL date formats, string time & string datetime data to datetime data type. In that case TRY_CONVERT returns a NULL. First, use the SQL Server Convert () function to change the DateTime expression to yyyymmdd string format. This is how to convert String to Date yyyymm in SQL Server 2019. 7 Use the optional time zone indicator Z to make it easier to map XML datetime values that have time zone information to SQL Server datetime values that have no time zone. In SQL Server, you can use CONVERT function to convert a DATETIME value to a string with the specified format. Suppose, the language in SQL Server instance is set to English(US), this means that the supported format for a string will be mm/dd/yyyy. In SQL Server, we can only convert a specific type of string to a date data type. In Oracle, TO_CHAR function converts a datetime value (DATE, TIMESTAMP data types i.e.) C#? And then, we are using the formated date result within the Convert() function to get the desired result. Now we will try to convert the joining date column from varchar to date within the WHERE clause by using the following query. CAST('2 February 2020 11:23:11.1134505' AS TIME ) AS time_value; Here is the result: 11:23:11.1134505. In SQL Server, you can use CONVERT or CAST functions to convert a datetime value (DATETIME, DATETIME2 data types i.e.) In the above query, we are using the Convert() function within the SELECT statement. After this, we are using the Convert() function to change the date data type result to varchar of length 6. In SQL Server, converting a string to date can be achieved in different approaches. Currently, he is a Ph.D. candidate in data science focusing on Big Data quality assessment techniques. In the end, it will return the following output. 9808 - This session's YDM date format is not supported when converting from this character string format to date, time, datetime2 or datetimeoffset. The Parse() function has 3 parameters, the first is an input string expression, the second is the required data type, and the third is an optional parameter named culture. Allow non-GPL plugins in a GPL main program. SQL Server provides a number of options you can use for formatting a date/time string in SQL queries and stored procedures either from an input file (Excel, CSV, etc.) Don't worry about 1000, it only assures that we will have the rest of the string, not any less. Hadi really enjoys learning new things everyday and sharing his knowledge. This is how to convert String to Date in where clause in SQL Server 2019. After this, use the Replace () function to replace colon (:) with an empty string in hh:mm:ss string. a compiled piece of code. This is how to convert string to date sql server 2019.. Read: How to Create a Database in SQL Server 2019 [Step by Step] SQL Server Convert String to Date dd/mm/yyyy. How did muzzle-loaded rifled artillery solve the problems of the hand-held rifle? Connect and share knowledge within a single location that is structured and easy to search. This might work in many cases and still breaks on another system. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. With this style, every distinct float or real value is guaranteed to convert to a distinct character string . rev2022.12.9.43105. His main expertise is in data integration. Should I give a brutally honest feedback on course evaluations? And by using the Convert() function, we can format it to yyyymmdd format. When you convert a datetimeoffset value to datetime, the date and time values are copied, and the time zone offset is truncated.When the fractional precision of the datetimeoffset value is greater than three digits, the value is truncated.. . His main expertise is in data integration. Read: How to Create a Database in SQL Server 2019 [Step by Step]. Read: How to execute function in SQL with parameters. This function works almost the same as the CONVERT() function, except that the syntax is slightly different (and CAST() doesn't accept the style argument).. -------------------- --------------------, ODBC canonical (with milliseconds) default for time, date, datetime2, and datetimeoffset. Delegate it to your Bussines Logic language ASP? Read: Saving changes is not permitted in SQL Server. When working with SQL Server, you may come across date values that are saved as strings. Optional. Convert varchar to datetime SQL Server. Input/Output. Solution 1. A Computer Science portal for geeks. I have looked online for a possible way to convert it without success. Any help helping me converting the string below to datetime datatype in SQL will be appreciated. And then, we have used the replace function to remove : (colon) from the timing part. ; datetime is an expression that evaluates to date or datetime value that you want to convert to a string; sytle specifies the format of the date. Copyright 2022 by www.sqlservertutorial.net. You may like the following SQL Server tutorials: In thisSQL Servertutorial, we have learnedHow to convert a String to Date in SQL Server, Different SQL Server Conversion Scenarios,and cover the below topic. In the above query, we are using the arse() function within the SELECT statement. Here, we do the same conversion as the previous example, but with the CONVERT() function. Besides working with SQL Server, he worked with different data technologies such as NoSQL databases, Hadoop, Apache Spark. For this particular conversion, there is no need to specify the style parameter. Why would Henry want to close the breach? While I focus on SQL Server Performance Tuning Comprehensive Database Performance Health Check, at the end of the consultancy, I like to answer any question my client has on SQL Server. The CONVERT() Function. You can convert it to a DATETIMEOFFSET - a badly-named type that is really date+time+timezone: SELECT CAST ('2013-10-10T00:00:00+05:00' AS DATETIMEOFFSET) Unfortunately, if you cast that to a datetime, it just truncates the offset rather than incorporate it into the datetime. I am Bijay having more than 15 years of experience in the Software Industry. We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. A small bolt/nut came off my mtn bike while washing it, can someone help me identify it? Code language: SQL (Structured Query Language) (sql) In this syntax: VARCHAR is the first argument that represents the string type. Values without a datepart are set to 1900-01-01. Login Join Us. Therefore, if you need to convert a string to a date/time format, this function can help. He is a MongoDB, Neo4j, and ArangoDB certified professional. For demonstration, consider the following query. The second approach for converting data types is the explicit conversion which is done by using some functions or tools. Now to convert a string data type to date, we can execute the following query. 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Disconnect vertical tab connector from PCB. Conversion failed when converting datetime from character string. Z indicates time zone UTC-0. In MySQL, you can use DATE_FORMAT function. Search. TRY_CONVERT to perform this operation. SELECT Id ,Name --Convert To Date Time ,CONVERT (datetime, -- Add 20 to the final 2 numbers to represent the year i.e 2013 ('20' + SUBSTRING (REGISTRATION_DT,5,2) + '-' + -- the first 2 numbers to . Use CONVERT or This is how to convert String to Date YYYYMMSSHHMMSS in SQL Server 2019. After execution, the query will return the following output. The only difference here is the syntax. And we can easily convert any valid string data type to date using the following syntax. Here we will use the "CONVERT" function to convert a datetime into different format in SQL Server. As an example, if we try to parse 13/12/2019 value without passing the culture information, it will fail since dd/MM/yyyy is not supported by the default language settings. style -- optional, the format of the date to be returned. In this case, 103 stands for British or French date format, which is dd/mm/yyyy. GETUTCDATE (): It returns datetime in GMT. In the end, the query will return the following output. This is how to convert String to Date dd/mm/yyyy in sql server 2019. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content. Can be one of the following values: Converting datetime to character: Without century. Hadi is an SQL Server professional with more than 10 years of experience. You can reach him on his personal website. In this tutorial, you have learned how to use convert a date to a string using the CONVERT() function. Change the session's date format or provide a style to the explicit conversion. Therefore, we can only convert ISO or supported formats based on the current language settings. In SQL Server, converting string to date implicitly depends on the string date format and the default language settings (regional settings); If the date stored within a string is in ISO formats: yyyyMMdd or yyyy-MM-ddTHH:mm:ss(.mmm), it can be converted regardless of the regional settings, else the date must have a supported format or it will throw an exception, as an example while working . or a date column (datetime, datetime2, smalldatetime, etc.) To solve this issue, you can use TRY_CAST(), TRY_CONVERT() or TRY_PARSE() functions to check if the value can be converted or not, if so, the function will return the conversion result, else it will return a NULL value. If the culture info is not specified, PARSE() acts similar to CAST() function, but when the culture is passed within the expression, the function tries to convert the value to the desired data type using this culture. The Parse() in SQL Server is another conversion function that converts the string data type to either numeric or Datetime data type. Want to learn MariaDB? This is how to convert String to Date mm/dd/yyyy in SQL Server 2019. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. This might work in many cases and still breaks on another system. There are two possibilities: SQL Server misinterprets the date time, because it thinks that it is in a different format. This article contains examples of converting a datetimeoffset value to datetime in SQL Server.. The string containing the date and time to convert must be in the format of the T-SQL date and time data type. Convert String to DATETIME with Different Formats, Convert String to DATETIME with TRY_CONVERT. The datetimeoffset data type allows you to specify a . This article contains examples to demonstrate its usage. After this, we have put a WHERE clause, and in the WHERE clause, we are using the Convert() function to change the joining date column to date data type. To convert a datetime to a string, you use the CONVERT() function as follows: The following table illustrates the valid style and the corresponding format of the datetime after converting to a string. style -- optional, the format of the input string to be converted. Now to convert a string to a dd/mm/yyyy formated date, first, we have to convert the string to a standard date format. A Computer Science portal for geeks. Ready to optimize your JavaScript with Rust? Would it be possible, given current technology, ten years, and an infinite amount of money, to construct a 7,000 foot (2200 meter) aircraft carrier? The below example requires the year to always be in 2000. you will also need to change the string YourTable to the table you want to query from. If a conversion fails, return NULL. Additionally, you can read more about implicitly converting date types in SQL Server, by referring to this article: Implicit conversion in SQL Server. 0 Products Dofactory .NET #1 .NET Success Platform . In this article. In SQL Server, converting a string to date explicitly can be achieved using CONVERT(). On the academic level, Hadi holds two master's degrees in computer science and business computing. This function tries to convert given value to a specified data type (data type length can only be specified). As an example, if we try to convert 13/12/2019 value to date without specifying the style number, it will fail since it is not supported by the current language setting: But, if we pass 103 as style number (103 is corresponding of dd/MM/yyyy date format), it will succeed: For more information about CONVERT() function and date style numbers, you can refer to the following articles: PARSE() is SQL CLR function that use .Net framework Parse() function. Solution 2: SELECT. And the Parse() syntax is as follows. If no time is specified, it will be set to 00:00:00.000. Now to convert a string to a dd/mm/yyyy formated date, first, we have to convert the string to a standard date format. For conversion, the string should follow a valid format to be converted to date. The style parameter is optional. I use this site for reference. After the execution it will return the following output. I am not familiar with any of those languages. Easiest way to convert int to string in C++. As mentioned above, converting a data type implicitly is not visible to the user, as an example when you are comparing two fields or values having different data types: In SQL Server, converting string to date implicitly depends on the string date format and the default language settings (regional settings); If the date stored within a string is in ISO formats: yyyyMMdd or yyyy-MM-ddTHH:mm:ss(.mmm), it can be converted regardless of the regional settings, else the date must have a supported format or it will throw an exception, as an example while working under the regional settings EN-US, if we try to convert a string with dd/MM/yyyy format it will fail since it tries to convert it as MM/dd/yyyy format which is supported. View all posts by Hadi Fadlallah, 2022 Quest Software Inc. ALL RIGHTS RESERVED. The way the query is written the contents of Q_OFDFIN in the first subquery are UNIONed with the contents of Range_Code in the second one. We cannot convert any given string expression to date. Msg 242, Level 16, State 3, Line 1 In the query above, first, we are using the Cast() function within the Convert() function to change the string to a date format. SQL Server: -- 3rd parameter specifies 121 style (ODBC 'YYYY-MM-DD HH:MI:SS.FFF' format with milliseconds) SELECT CONVERT(VARCHAR, GETDATE(), 121); # 2012-11-29 19:18:41.863 In the above query, we are using the Cast() function within the Convert() function to change the string to a date format. As an example, many times you may face bad date values such as 01/01/0000; these values cannot be converted and will throw a data conversion exception. Just to mention this: Be aware of the language dependency. How do I convert a String to an int in Java? And for the format, we are defining the style code in Covert() function as 101. By using some built-in function in SQL Server we can get the datetime value in specific format. While working with raw data, you may frequently face date values stored as text. from a table. All the examples, I have done here in sql server 2019 and SQL server management studio. How does legislative oversight work in Switzerland when there is technically no "opposition" in parliament? It's similar to the CAST() function, but one of the benefits of CONVERT() is that, when you convert from a date/time data type to a string, you can add an optional argument that specifies the style that you want the return value to be in. One of the first considerations is the actual date/time value needed. . This function takes 3 arguments: (1) the desired data type, (2) the input value and (3) the style number (optional). Convert different string formats to datetime values. This is how to convert string to date sql server 2019. In SQL Server, we cannot directly convert a string to a YYYYMMDDHHMMSS format. The format used to convert between data types, such as a date or string format. 2 Answers. To understand the differences among these conversion functions and also to decide which function to use in which scenario, you can refer to this site. In thisSQL Servertutorial, we will discussHow to convert a String to Date in SQL Server, Different SQL Server Conversion Scenarios,and cover the below topic. He's one of the top ETL and SQL Server Integration Services contributors at Stackoverflow.com . 18. Not the answer you're looking for? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Read: How to create functions in SQL Server Management Studio. You can, however, use DATEPART to take the various . Read: SQL Server Convert Function + Examples. In SQL Server, you can use the CONVERT() function to convert an expression of one data type to another. The value to convert to another data type. In the above query, we are using the Convert() function within the SELECT statement. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Asking for help, clarification, or responding to other answers. How do I parse a string to a float or int? Also, I am a Microsoft MVP. How to print and pipe log file at the same time? All Rights Reserved. Both CONVERT() and TRY_CONVERT() function can recognize ANSI/ISO and US formats with various delimiters by default so you don't have to add the style parameter.. datetime-value -- the datetime value to be converted. For more examples, see How to Convert a String to a Date/Time in SQL Server using CAST(). Add a column with a default value to an existing table in SQL Server, How to return only the Date from a SQL Server DateTime datatype, How to check if a column exists in a SQL Server table, How to concatenate text from multiple rows into a single text string in SQL Server. Strictly speaking, time uses 4, 5, or 6 bytes, because an extra byte is used to store its precision. which denotes a delegate that is pretty much a pointer to a method, i.e. Check out all the articles and tutorials that I wrote on MariaDB. CONVERT (DATE, TSTAMP, 103) -- 103 is dd/mm/yyyy. In Oracle, TO_DATE function converts a string value to DATE data type value using the specified format. The culture parameter is used to specify the formatting. CGAC2022 Day 10: Help Santa sort presents! The Convert() is a more advanced conversion function available in SQL Server, and it is much similar to Cast() function. select cast (right ("string",20) as datetime) as dateColumn from table. We can easily convert an input string to data using the following query. For conversion, we can use the following query. (TA) Is it appropriate to ignore emails from a student asking obvious questions? For this, you don't need to separate the date portion in anyway, as SQL Server will be able to understand it as it's formatted. Convert different string formats to datetime values. And we are going to discuss each function in the section below. Use for lossless conversion. For this particular conversion, there is no need to specify the culture parameter. SQL Server Convert String to Date with format, SQL Server Convert String to Date yyyymmddhhmmss. To get the required result, we are using the 112 style code. The main difference between Covert() and Cast() functions is their syntax, and the Convert() also accepts an additional parameter named style. In this article, we explained data conversion approaches in general. This article contains examples of converting a datetime value to a time value in SQL Server.. One of the benefits of converting a datetime value to time is that you reduce the storage size from 8 bytes, down to either 3, 4, or 5 bytes (depending on the precision you use for the time value). So all you need to do is cut out the Fri part: if the day of week part may have variable length. And in the Cast() function, we have given the input expression as 16 June 2021, and we also want the data type to be a date. I usually build all my logic in SQL. If the style number is not passed to the function, it acts like the CAST() function. string-value -- the string value to be converted. And then, we can use the Convert() function to format the date according to our requirements. 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