We cannot change table properties to satisfy each requirement. We do face many such scenarios when we do not have a date format as per our requirement. You want to have data in the report in format YYYY-MM-DD You have a daily Sales report, and in that, you want data group by date. Suppose you have data in a table in the format YYYY-MM-DD hh:mm: ss. You fail to insert data in the Product table because the application tries to insert data in a different date format You might face the following issues with it It creates a timestamp for each customer order. Suppose you have a Product table with a column timestamp. It can be a complicated thing to deal with, at times, for SQL Server developers. We need to work with date type data in SQL. Thanks for your excellent tip.In this article, we will explore various SQL Convert Date formats to use in writing SQL queries. And, please, don't do like the rest of the people have about this and say that "performance sometimes doesn't matter" because it always matters and don't try to justify it to support "migratable" code because easily easily migratable code is a myth. 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. How SQL Server handles the date format YYYY-MM-DD SQL Date Format examples using SQL FORMAT Function SQL Server Date and Time Functions with Examples
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