SQLServer 语句相关

 --查询两行张表不同的数据

--相同数据
select tel_no
from a
intersect
select tel_no
from b

--不同数据
select tel_no
from b
except
select tel_no
from a

  --将一张表的数据更新到另外一张表

  update A SET A.mc = b.mc FROM A ,B WHERE A.bmbh = B.bmbh and A.xmbh = B.xmbh;

--查询数据库重复数据
select * from 数据表 WHERE 重复记录字段 in ( select 重复记录字段 from  数据表 group by 重复记录字段 having count(重复记录字段)>1)

--中文转简拼

Create function [dbo].[HW_ChineseSimplified](@str nvarchar(255))returns nvarchar(50)

as
begin
declare @word nchar(1),@PY nvarchar(50)
set @PY=''
 while len(@str)>0
begin
set @word=left(@str,1)
--如果非汉字字符，返回原字符
set @PY=@PY+(case when unicode(@word) between 19968 and 19968+20901
then (select top 1 PY from (
select 'A' as PY,N'骜' as word
union all select 'B',N'簿'
union all select 'C',N'错'
union all select 'D',N'鵽'
union all select 'E',N'樲'
union all select 'F',N'鳆'
union all select 'G',N'腂'
union all select 'H',N'夻'
union all select 'J',N'攈'
union all select 'K',N'穒'
union all select 'L',N'鱳'
union all select 'M',N'旀'
union all select 'N',N'桛'
union all select 'O',N'沤'
union all select 'P',N'曝'
union all select 'Q',N'囕'
union all select 'R',N'鶸'
union all select 'S',N'蜶'
union all select 'T',N'箨'
union all select 'W',N'鹜'
union all select 'X',N'鑂'
union all select 'Y',N'韵'
union all select 'Z',N'咗'
) T
where word>=@word collate Chinese_PRC_CS_AS_KS_WS
order by PY ASC) else @word end)
set @str=right(@str,len(@str)-1)
end
return @PY
end

--剔除数据中的中文字符

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE FUNCTION [dbo].[HW_GET_ZNSTR](@S NVARCHAR(100))
RETURNS VARCHAR(100)
AS
BEGIN
WHILE PATINDEX('%[^0-9A-Za-z]%',@S) > 0
SET @S = STUFF(@S,PATINDEX('%[^0-9A-Za-z]%',@S),1,N'')
RETURN @S
END

--sql字符串排序

SET ANSI_NULLS ON
    GO
    SET QUOTED_IDENTIFIER ON
    GO
    CREATE FUNCTION [dbo].[pr_GET_ZNSTR_ESC](@S NVARCHAR(100))
    RETURNS VARCHAR(100)
    AS
    BEGIN
    WHILE PATINDEX('%[^a-zA-Z]%',@S) > 0
    SET @S = STUFF(@S,PATINDEX('%[^a-zA-Z]%',@S),1,N'')
    RETURN @S
    END

SELECT *,dbo.HW_GET_ZNSTR(BuildingNo) AS c FROM dbo.RT_BuildingNo ORDER BY c,len(BuildingNo), BuildingNo

--查询两个时间的差值

select datediff(year, 开始日期,结束日期); --两日期间隔年
   select datediff(quarter, 开始日期,结束日期); --两日期间隔季
   select datediff(month, 开始日期,结束日期); --两日期间隔月
   select datediff(day, 开始日期,结束日期); --两日期间隔天
   select datediff(week, 开始日期,结束日期); --两日期间隔周
   select datediff(hour, 开始日期,结束日期); --两日期间隔小时
   select datediff(minute, 开始日期,结束日期); --两日期间隔分
   select datediff(second, 开始日期,结束日期); --两日期间隔秒