![]() The warning should be that it's a serious performance performance and it should never be used in T-SQL until they fix it. Good article but FORMAT has been out for quite a while and so have the tests that prove that it's usually about 43 times slower than even some of the strange combinations of multiple CONVERTs. Good thing there are usually multiple ways to do things in SQL Server. Hi Jeff, thanks for your input on performance with the FORMAT statement. ![]() Wednesday, Novem1:54:12 PM - Greg Robidoux Great solution for converting date to an integer " CONVERT(CHAR(8),112) as 'MyDate' " and this solution is efficient than converting date this way " FORMAT(, 'yyyyMMdd') as 'MyDate' " ![]() Wednesday, Janu4:56:06 PM - Zingisa Matwana In other words, DATETIME is not standard.Īlso, a tiny observation: if you ever create, say, a computed column that will use CAST for date-time conversion, when you script out the table, you will notice that the script will be created using CONVERT, not CAST.Īs a final note: 'YYYMMDD' and 'YYMMDD' are ISO standard, so they should be used for data retrieval. : Use the time, date, datetime2 and datetimeoffset data types for new work. The different date delimiters and the ability to use different delimited dates as Results: Review the 3 result sets from the queries! Note Note using Year, month, day in the where clause that SQL server will recognize different delimiters: dash, slash, dot or no delimiter as shown above. ![]() SELECT FORMAT(,'yyyy-MM-dd') as 'MyDate_w_Dash',įORMAT(,'yyyy/MM/dd') as 'MyDate_w_Slash',įORMAT(,'yyyy.MM.dd') as 'MyDateTime_w_Dot' Alternative formates that returs Year Month Day mixing Date and Datetime formats using FORMAT: Alternative formats that returns Year Month Day mixing Date and Datetime formats using CONVERT: ![]()
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