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  • 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

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  • 原文地址:https://www.cnblogs.com/provedl/p/10734849.html
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