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  • MSSQL 存储过程实现更新,如果要更新的字段内容为空,则该字段不作变更,只更新其他字段

    一项目有这个需求,顺便将代码贴上,共同学习。

    /****** 定义输入参数 ******/
    ALTER proc [dbo].[upkeywords]
    @inkeyval nvarchar(100),
    @inkeycompete int,
    @inkeyinclude int,
    @inKeyID int

    as

    DECLARE
    /****** 定义变量 ******/
    @keyval nvarchar(100),
    @keycompete int,
    @keyinclude int,
    @KeyID int
    /****** 给变量赋原来的值 ******/
    set @keyval=(select KeyVal from Keywords where KeyID=@inKeyID)
    set @keycompete=(select keycompete from Keywords where KeyID=@inKeyID)
    set @keyinclude=(select keyinclude from Keywords where KeyID=@inKeyID)

    /****** 如果传入的参数是NULL,就将原来的值还给它 ******/
    update Keywords set
    KeyVal
    =ISNULL(@inkeyval,@keyval),
    keycompete
    =ISNULL(@inkeycompete,@keycompete),
    keyinclude
    =ISNULL(@inkeyinclude,@keyinclude)
    where KeyID=@inKeyID
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  • 原文地址:https://www.cnblogs.com/qiqi9039420/p/2048490.html
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