SQL Server Date函数 下面列举出了SQL Server中最重要的内建日期函数: 1、GETDATE() 返回当前日期和时间 语法: GETDATE() 下面是SELECT语句: SELECT GETDATE() AS DateTime 结果如下所示: 注释:上面的时间是精确到毫秒。 2、DATEPART() 返回日期/时间的单独部分 语法: DATEPART(datepart,date) date参数是合法...
-- SQL GETDATEDECLARE@TimeStartDATETIMEDECLARE@TimeDATETIMEDECLARE@TimeEndDATETIMEDECLARE@IINTDECLARE@CountINTSET@I=0SET@Count=0SET@TimeStart=GETDATE()SET@Time=@TimeStartWHILE@I<10000000BEGINSET@TimeEnd=GETDATE()IF@TimeEnd!=@TimeBEGINSET@Count=@Count+1SET@Time=@TimeEndENDSET@I=@I+1ENDPRINTC...
(Pun not intended.) More specifically, if you need to find data within a given timeframe, then an SQL date range is what you need. In this post, we’ll take you on a SQL date range trip. You’ll understand what “SQL date range” means, the value it brings to your database quer...
The Date/Time Extended data type stores date and time information and is similar to the Date/Time data type, but it provides a larger date range, a higher fractional precision, and compatibility with the SQL Server datetime2 date type. When you import or link Access data to SQL ...
CREATETABLEt1(tTIME(3),dtDATETIME(6),tsTIMESTAMP(0)); Thefspvalue, if given, must be in the range 0 to 6. A value of 0 signifies that there is no fractional part. If omitted, the default precision is 0. (This differs from the standard SQL default of 6, for compatibility with ...
A date and time combination. The supported range is'1000-01-01 00:00:00.000000'to'9999-12-31 23:59:59.499999'. MySQL displaysDATETIMEvalues in'YYYY-MM-DD hh:mm:ss[.fraction]'format, but permits assignment of values toDATETIMEcolumns using either strings or numbers. ...
Not all available time zones are shown; check your YSQL output to find the time zone you are interested in. You can set the time zone to use for your session using the SET command. You can SET the time zone using the time zone name as listed in pg_timezone_names, but not the abb...
总结:Oracle数据库的date类型和mysql的date类型是不一样的,Oracle为yyyy-mm-dd hh:mi:ss和mysql中的datetime类型匹配, 而 mysql 为 yyyy-mm 。当在存在空值的时候,mysql的time 类型可以使用0零来插入,而date,datetime,timestamp可以使用null 来插入,但是timestamp即使为null,也会默认插入当前时间戳。
It takes 8 bytes to store the date/time data. 5) DATETIME2 : This is a new data type introduced in SQL Server 2008 and this date/time data type is introduced to store the high precision date and time data. The data type can be defined for variable lengths depending on the r...
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':00:00' at line 1 mysql> alter table test3 add sign time not null default '00:00:00'; ...