![]() This example shows how to use the CONVERT() function to convert strings in ISO date format to datetime values: SELECT CONVERT(DATETIME, '') The TRY_CONVERT() function, on the other hand, returns NULL instead of raising an error if the conversion fails: SELECT TRY_CONVERT(DATETIME, '', 102) result Ĭode language: SQL (Structured Query Language) ( sql ) Converting a string in ANSI/ISO and US date format to a datetimeīoth 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. The following is the error message: The conversion of a varchar data type to a datetime data type resulted in an out-of-range value. If the conversion fails, the CONVERT() function will raise an error: SELECT CONVERT(DATETIME, '', 102) result This example uses the CONVERT() function to convert a string in ANSI date format to a datetime: SELECT CONVERT(DATETIME, '', 102) result The main difference between CONVERT() and TRY_CONVERT() is that in case of conversion fails, the CONVERT() function raises an error while the TRY_CONVERT() function returns NULL. SQL Server provides the CONVERT() function that converts a value of one type to another: CONVERT(target_type, expression )Ĭode language: SQL (Structured Query Language) ( sql )īesides the CONVERT() function, you can also use the TRY_CONVERT() function: TRY_CONVERT(target_type, expression ) Introduction to CONVERT() and TRY_CONVERT() functions This example demonstrates that the expression must be in the expected format.Summary: in this tutorial, you will learn how to convert a string to a datetime in SQL Server using the CONVERT() and TRY_CONVERT() function. Explicit conversion from data type int to xml is not allowed. The result of this statement is an error, because an integer cannot be cast into an xml data type. The following example demonstrates that TRY_CONVERT returns an error when the cast is explicitly not permitted. SELECT TRY_CONVERT(datetime2, '') AS Result The following example demonstrates that the expression must be in the expected format. SELECTĬASE WHEN TRY_CONVERT(float, 'test') IS NULL The following example demonstrates that TRY_CONVERT returns null when the cast fails. ![]() It will not be remoted to servers that have a version below SQL Server 2012 (11.x). This function is capable of being remoted to servers that have a version of SQL Server 2012 (11.x) and above. TRY_CONVERT is a reserved keyword in compatibility level 110 and higher. However if you request a conversion that is explicitly not permitted, then TRY_CONVERT fails with an error. If the cast succeeds, TRY_CONVERT returns the value as the specified data_type if an error occurs, null is returned. TRY_CONVERT takes the value passed to it and tries to convert it to the specified data_type. Returns a value cast to the specified data type if the cast succeeds otherwise, returns null. ![]() If style is null, then TRY_CONVERT returns null. The range of acceptable values is determined by the value of data_type. For more information, see CAST and CONVERT (Transact-SQL). ![]() Style accepts the same values as the style parameter of the CONVERT function. Optional integer expression that specifies how the TRY_CONVERT function is to translate expression. The data type into which to cast expression. To view Transact-SQL syntax for SQL Server 2014 and earlier, see Previous versions documentation.
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