How do I cast datetime as date?

How do I cast datetime as date?

MS SQL Server – How to get Date only from the datetime value?

1. Use CONVERT to VARCHAR: CONVERT syntax: CONVERT ( data_type [ ( length ) ] , expression [ , style ] )
2. You can also convert to date: SELECT CONVERT(date, getdate()); It will return the current date value along with starting value for time.
3. Use CAST.

What is the difference between date and datetime?

DATE: It is used for values with a date part but no time part. DATETIME: It is used for values that contain both date and time parts. MySQL retrieves and displays DATETIME values in YYYY-MM-DD HH:MM:SS format. The supported range is 1000-01-01 00:00:00 to 9999-12-31 23:59:59 .

How to cast a datetime column to a date?

Casting a datetime column to date is sargable and can use an index on the datetime column. select * from T where cast(DateTimeCol as date) = ‘20130101’; The other option you have is to use a range instead.

How long does it take to cast a date to a date?

The CAST as DATE version gave a serial version that completed in 4.5 seconds and the range version a parallel plan that completed in elapsed time 1.1 seconds with CPU time of 3.2 seconds. Applying MAXDOP 1 to the second query to make the figures more easily comparable returns the following.

How to join date ranges in SQL Server?

You could first do a self-join on the exchange rates which are ordered by date so that you have the start and the end date of each exchange rate, without any overlap or gap in the dates (maybe add that as view to your database – in my case I’m just using a common table expression).

Why is cast to date sargable in SQL Server?

The mechanism behind the sargability of casting to date is called dynamic seek. SQL Server calls an internal function GetRangeThroughConvert to get the start and end of the range. Somewhat surprisingly this is not the same range as your literal values.