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  • sql server中sql语句中单引号怎么转义?

    sql server有两个转义符: 

    ' 默认情况下, '是字符串的边界符, 如果在字符串中包含', 则必须使用两个', 第1个'就是转义符 


    另一个转义符是" 

    当SET QUOTED_IDENTIFIER OFF时, "是字符串边界符, 字符串中的"必须用两个"表示。 

    vb: "" <=> "
    sql server 2000: ''' <=> '

    eg:

    declare @SearchType nvarchar(50)
    declare @SearchString nvarchar(255)
    declare @SearchKey nvarchar(50)
    declare @SearchSql nvarchar(2000)

    set @SearchType = '2'
    set @SearchKey = 'd'

    set @SearchString = CASE @SearchType 
                                when '1'  then '1 = 1'
                                when '2'  then  'p.ProjectName like ''' + '%'  +  @searchkey + '%'  + ''''
                                when '3'  then  'p.ProjectCity like ''' + '%'+ @searchkey + '%' +''''
                                when '4'  then  'c.CateName like '''  + '%' + @searchkey + '%' + ''''
                                when '4'  then  'p.ProjectManager like ''' + '%' + @searchkey + '%' +'''' 
                                END

    set @SearchSql = N'

    SELECT p.*,datename(year,ProjectPostTime)+ '   +  '''-''' + ' + datename(month,ProjectPostTime)+ '+ '''-''' + ' + datename(day,ProjectPostTime)' + ' as PostTime, m.EmpName,c.CateName FROM proProject As p ,mrBaseInf As m ,proCate c WHERE p.EmpID = m.EmpID and p.CateID = c.CateID  and '
     
     + @SearchString


    print(@SearchSql)

    exec(@SearchSql)

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  • 原文地址:https://www.cnblogs.com/lang2017/p/6855991.html
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