This example uses the TRY_CONVERT() function to convert the current system date and time to a date value: SELECT TRY_CONVERT( DATE, GETDATE()) Result This example, on the other hand, returns NULL because the cast fails: SELECT TRY_CONVERT( INT, '100.5') Result Ĭode language: SQL (Structured Query Language) ( sql ) E) Using TRY_CONVERT() function to convert datetime to date or time example This example uses the TRY_CONVERT() function to convert a string to an integer: SELECT TRY_CONVERT( INT, '100') Result The following example returns NULL because the TRY_CONVERT() function cannot convert the string '1234.5' to a DECIMAL(4, 2): SELECT TRY_CONVERT( DECIMAL( 4, 2), '1234.5') Result Ĭode language: SQL (Structured Query Language) ( sql ) D) Using TRY_CONVERT() function to convert string to integer examples The following shows another example: SELECT TRY_CONVERT( DECIMAL( 4, 2), '12.345') Result This example uses the TRY_CONVERT() function to convert a string to decimal: SELECT TRY_CONVERT( DECIMAL( 4, 2), '12.34') Here is the error: Explicit conversion from data type int to xml is not allowed.Ĭode language: SQL (Structured Query Language) ( sql ) C) Using TRY_CONVERT() function to convert string to decimal examples The following example returns an error because the integer cannot be cast into an XML data type: SELECT TRY_CONVERT( XML, 20) This example shows how the TRY_CONVERT() function returns NULL when the cast fails: SELECT CASE WHEN TRY_CONVERT( INT, 'test') IS NULL THEN 'Cast failed' ELSE 'Cast succeeded' END AS Result Ĭode language: SQL (Structured Query Language) ( sql ) B) TRY_CONVERT() raises an error example Let’s take some examples of using the TRY_CONVERT() function. SQL Server TRY_CONVERT() function examples To handle the result of the CONVERT() function if the cast fails, you use the TRY.CATCH statement. You can use the NULL handling functions or expressions such as ISNULL() and COALESCE to handle the result of the TRY_CONVERT() function in case the cast fails. This is the main difference between the two functions. If the cast fails, the TRY_CONVERT() function returns NULL while the CONVERT() function raises an error. However, if you request a conversion that is explicitly not permitted, the TRY_CONVERT() function will fail with an error. It returns the value as the specified data if the cast succeeds Otherwise, it returns. The TRY_CONVERT() function tries to convert the value passed to it to a specified data type. style is a provided integer that specifies how the function will translate the expression.data_type is a valid data type into which the function will cast the expression.The TRY_CONVERT() accepts three arguments: The following illustrates the syntax of the TRY_CONVERT() function: TRY_CONVERT (Ĭode language: SQL (Structured Query Language) ( sql ) The TRY_CONVERT() function converts a value of one type to another. SQL Server TRY_CONVERT() function overview Summary: in this tutorial, you will learn how to use the SQL Server TRY_CONVERT() function to convert a value of one type to another.
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