if exists (select * from dbo.sysobjects where id = object_id(N'dbo.calculateWeek') and xtype in (N'FN', N'IF', N'TF')) -- 删除函数 drop function dbo.calculateWeek GO create function dbo.calculateWeek(@start int,@end int,@dsz int,@total int) returns varchar(50) AS BEGIN declare @week varchar(50); declare @i int set @week='' set @i=1 while @i<=@total begin if @i<@start set @week=@week+'0' if @i>=@start and @i<=@end and @dsz=0 set @week=@week+'1' if @i>=@start and @i<=@end and @dsz=1 and @i%2=1 set @week=@week+'1' if @i>=@start and @i<=@end and @dsz=1 and @i%2=0 set @week=@week+'0' if @i>=@start and @i<=@end and @dsz=2 and @i%2=0 set @week=@week+'1' if @i>=@start and @i<=@end and @dsz=2 and @i%2=1 set @week=@week+'0' if @i>@end set @week=@week+'0' set @i=@i+1 END return @week END
sql server 2005 创建自定义函数
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