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Sql Server 数据库日期格式化函数

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Sql Server 中一个非常强大的日期格式化函数 Select CONVERT(varchar(100), GETDATE(), 0) : 05 16 2006 10:57AM Select CONVERT(varchar(100), GETDATE(), 1) : 05/16/06 Select CONVERT(varchar(100), GETDATE(), 2) : 06.05.16 Select CONVERT(varchar(10

   Sql Server 中一个非常强大的日期格式化函数

  Select CONVERT(varchar(100), GETDATE(), 0) : 05 16 2006 10:57AM

  Select CONVERT(varchar(100), GETDATE(), 1) : 05/16/06

  Select CONVERT(varchar(100), GETDATE(), 2) : 06.05.16

  Select CONVERT(varchar(100), GETDATE(), 3) : 16/05/06

  Select CONVERT(varchar(100), GETDATE(), 4) : 16.05.06

  Select CONVERT(varchar(100), GETDATE(), 5) : 16-05-06

  Select CONVERT(varchar(100), GETDATE(), 6) : 16 05 06

  Select CONVERT(varchar(100), GETDATE(), 7) : 05 16, 06

  Select CONVERT(varchar(100), GETDATE() : 10:57:46

  Select CONVERT(varchar(100), GETDATE(), 9): 05 16 2006 10:57:46:827AM

  Select CONVERT(varchar(100), GETDATE(), 10): 05-16-06

  Select CONVERT(varchar(100), GETDATE(), 11): 06/05/16

  Select CONVERT(varchar(100), GETDATE(), 12): 060516

  Select CONVERT(varchar(100), GETDATE(), 13): 16 05 2006 10:57:46:937

  Select CONVERT(varchar(100), GETDATE(), 14): 10:57:46:967

  Select CONVERT(varchar(100), GETDATE(), 20): 2006-05-16 10:57:47

  Select CONVERT(varchar(100), GETDATE(), 21): 2006-05-16 10:57:47.157

  Select CONVERT(varchar(100), GETDATE(), 22): 05/16/06 10:57:47 AM

  Select CONVERT(varchar(100), GETDATE(), 23): 2006-05-16

  Select CONVERT(varchar(100), GETDATE(), 24): 10:57:47

  Select CONVERT(varchar(100), GETDATE(), 25): 2006-05-16 10:57:47.250

  Select CONVERT(varchar(100), GETDATE(), 100): 05 16 2006 10:57AM

  Select CONVERT(varchar(100), GETDATE(), 101): 05/16/2006

  Select CONVERT(varchar(100), GETDATE(), 102): 2006.05.16

  Select CONVERT(varchar(100), GETDATE(), 103): 16/05/2006

  Select CONVERT(varchar(100), GETDATE(), 104): 16.05.2006

  Select CONVERT(varchar(100), GETDATE(), 105): 16-05-2006

  Select CONVERT(varchar(100), GETDATE(), 106): 16 05 2006

  Select CONVERT(varchar(100), GETDATE(), 107): 05 16, 2006

  Select CONVERT(varchar(100), GETDATE(), 108): 10:57:49

  Select CONVERT(varchar(100), GETDATE(), 109): 05 16 2006 10:57:49:437AM

  Select CONVERT(varchar(100), GETDATE(), 110): 05-16-2006

  Select CONVERT(varchar(100), GETDATE(), 111): 2006/05/16

  Select CONVERT(varchar(100), GETDATE(), 112): 20060516

  Select CONVERT(varchar(100), GETDATE(), 113): 16 05 2006 10:57:49:513

  Select CONVERT(varchar(100), GETDATE(), 114): 10:57:49:547

  Select CONVERT(varchar(100), GETDATE(), 120): 2006-05-16 10:57:49

  Select CONVERT(varchar(100), GETDATE(), 121): 2006-05-16 10:57:49.700

  Select CONVERT(varchar(100), GETDATE(), 126): 2006-05-16T10:57:49.827

  Select CONVERT(varchar(100), GETDATE(), 130): 18 ???? ?????? 1427 10:57:49:907AM

  Select CONVERT(varchar(100), GETDATE(), 131): 18/04/1427 10:57:49:920AM

  常用:

  Select CONVERT(varchar(100), GETDATE(): 10:57:46

  Select CONVERT(varchar(100), GETDATE(), 24): 10:57:47

  Select CONVERT(varchar(100), GETDATE(), 108): 10:57:49

  Select CONVERT(varchar(100), GETDATE(), 12): 060516

  Select CONVERT(varchar(100), GETDATE(), 23): 2006-05-16

  存储过程中常用知识点:

  循环

  declare @i int

  set @i=1

  while @i

  begin

  insert into test (userid) values(@i)

  set @i=@i+1

  end

  用变量代替表名的方法

  declare @fld nvarchar(255)

  declare @sql nvarchar(255)

  select @fld = 'userName'

  select @sql = 'select ' + @fld + ' from tbl'

  exec sp_executesql @sql

  备份收缩数据库

  backup log register with NO_LOG

  backup log register with TRUNCATE_ONLY

  DBCC SHRINKDATABASE(register)

  SELECT [id], [gnname], rtrim([url]) as url, [gnsm], [gnqx] FROM [bg_gnmx]

  rtrim() //去掉右边的空格

  ltrim() //去掉左边的空格

  注意:使用函数后,必须对其他使用别名

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