How do I get just the date when using MSSQL GetDat

问题:

This question already has an answer here:

• How to return only the Date from a SQL Server DateTime datatype 38 answers

DELETE from Table WHERE Date > GETDATE();

GETDATE() includes time. Instead of getting

2011-01-26 14:58:21.637

How can I get:

2011-01-26 00:00:00.000

回答1:

Slight bias to SQL Server

• Best approach to remove time part of datetime in SQL Server
• Most efficient way in SQL Server to get date from date+time?

Summary

DATEADD(day, DATEDIFF(day, 0, GETDATE()), 0)

SQL Server 2008 has date type though. So just use

CAST(GETDATE() AS DATE)

Edit: To add one day, compare to the day before "zero"

DATEADD(day, DATEDIFF(day, -1, GETDATE()), 0)

From cyberkiwi:

An alternative that does not involve 2 functions is (the +1 can be in or ourside the brackets).

DATEDIFF(DAY, 0, GETDATE() +1)

DateDiff returns a number but for all purposes this will work as a date wherever you intend to use this expression, except converting it to VARCHAR directly - in which case you would have used the CONVERT approach directly on GETDATE(), e.g.

convert(varchar, GETDATE() +1, 102)

回答2:

For SQL Server 2008, the best and index friendly way is

DELETE from Table WHERE Date > CAST(GETDATE() as DATE);

For prior SQL Server versions, date maths will work faster than a convert to varchar. Even converting to varchar can give you the wrong result, because of regional settings.

DELETE from Table WHERE Date > DATEDIFF(d, 0, GETDATE());

_{Note: it is unnecessary to wrap the DATEDIFF with another DATEADD}

回答3:

It's database specific. You haven't specified what database engine you are using.

e.g. in PostgreSQL you do cast(myvalue as date).

回答4:

SELECT CONVERT(DATETIME, CONVERT(varchar(10), GETDATE(), 101))

回答5:

You can use

DELETE from Table WHERE Date > CONVERT(VARCHAR, GETDATE(), 101);

回答6:

CONVERT(varchar,GETDATE(),102)

回答7:

Here you have few solutions ;)

http://www.bennadel.com/blog/122-Getting-Only-the-Date-Part-of-a-Date-Time-Stamp-in-SQL-Server.htm