Oracle:
系统时间比较熟悉 是select sysdate from dual时间类型获取;
select to_char(sysdate, 'yyyy-mm-dd hh24:mi:ss') from dual;以字符串形式获取
db2:SELECT CURRENT TIMESTAMP FROM SYSIBM.SYSDUMMY1获取系统时间
还有select CURRENT DATE from SYSIBM.SYSDUMMY1;获得日期select CURRENT TIME from SYSIBM.SYSDUMMY1;获得时间SQL Server:
使用GETDATE()
SQL Server拥有非常强大的日期函数:
Select CONVERT(varchar(100), GETDATE(), 0): 05 16 2008 10:57AM
Select CONVERT(varchar(100), GETDATE(), 1): 05/16/08Select CONVERT(varchar(100), GETDATE(), 2): 08.05.16Select CONVERT(varchar(100), GETDATE(), 3): 16/05/08Select CONVERT(varchar(100), GETDATE(), 4): 16.05.08Select CONVERT(varchar(100), GETDATE(), 5): 16-05-08Select CONVERT(varchar(100), GETDATE(), 6): 16 05 08Select CONVERT(varchar(100), GETDATE(), 7): 05 16, 08Select CONVERT(varchar(100), GETDATE(), 8): 10:57:46Select CONVERT(varchar(100), GETDATE(), 9): 05 16 2008 10:57:46:827AMSelect CONVERT(varchar(100), GETDATE(), 10): 05-16-08Select CONVERT(varchar(100), GETDATE(), 11): 08/05/16Select CONVERT(varchar(100), GETDATE(), 12): 080516Select CONVERT(varchar(100), GETDATE(), 13): 16 05 2008 10:57:46:937Select CONVERT(varchar(100), GETDATE(), 14): 10:57:46:967Select CONVERT(varchar(100), GETDATE(), 20): 2008-05-16 10:57:47Select CONVERT(varchar(100), GETDATE(), 21): 2008-05-16 10:57:47.157Select CONVERT(varchar(100), GETDATE(), 22): 05/16/08 10:57:47 AMSelect CONVERT(varchar(100), GETDATE(), 23): 2008-05-16Select CONVERT(varchar(100), GETDATE(), 24): 10:57:47Select CONVERT(varchar(100), GETDATE(), 25): 2008-05-16 10:57:47.250Select CONVERT(varchar(100), GETDATE(), 100): 05 16 2008 10:57AMSelect CONVERT(varchar(100), GETDATE(), 101): 05/16/2008Select CONVERT(varchar(100), GETDATE(), 102): 2008.05.16Select CONVERT(varchar(100), GETDATE(), 103): 16/05/2008Select CONVERT(varchar(100), GETDATE(), 104): 16.05.2008Select CONVERT(varchar(100), GETDATE(), 105): 16-05-2008Select CONVERT(varchar(100), GETDATE(), 106): 16 05 2008Select CONVERT(varchar(100), GETDATE(), 107): 05 16, 2008Select CONVERT(varchar(100), GETDATE(), 108): 10:57:49Select CONVERT(varchar(100), GETDATE(), 109): 05 16 200810:57:49:437AM ......MYSQL:
select now();
输出 09-12-25