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  • 数据库自定义函数

    这个为通用过滤关键字的函数,若有其他关键字未添加可以参考语法加入。

    USE [Db]
    GO

    /****** Object: UserDefinedFunction [dbo].[f_FilterString] Script Date: 12/09/2013 17:03:45 ******/
    SET ANSI_NULLS ON
    GO

    SET QUOTED_IDENTIFIER ON
    GO


    CREATE function [dbo].[f_FilterString] --通用函数。过滤关键字
    (@SqlString nvarchar(1000))--参数为需要过滤的参数
    returns nvarchar(1000)
    as
    begin
    declare @FiString nvarchar(20)
    declare @count int


    set @FiString='select'
    set @count= CHARINDEX(@FiString,@SqlString)

    if(@count>0)
    begin
    set @SqlString=replace(@SqlString,@FiString,'')
    end

    set @FiString='delete'
    set @count= CHARINDEX(@FiString,@SqlString)

    if(@count>0)
    begin
    set @SqlString=replace(@SqlString,@FiString,'')
    end


    set @FiString='drop'
    set @count= CHARINDEX(@FiString,@SqlString)

    if(@count>0)
    begin
    set @SqlString=replace(@SqlString,@FiString,'')
    end

    set @FiString='truncate'
    set @count= CHARINDEX(@FiString,@SqlString)

    if(@count>0)
    begin
    set @SqlString=replace(@SqlString,@FiString,'')
    end

    set @FiString='--'
    set @count= CHARINDEX(@FiString,@SqlString)

    if(@count>0)
    begin
    set @SqlString=replace(@SqlString,@FiString,'')
    end


    set @FiString='update'
    set @count= CHARINDEX(@FiString,@SqlString)

    if(@count>0)
    begin
    set @SqlString=replace(@SqlString,@FiString,'')
    end

    set @FiString='insert into'
    set @count= CHARINDEX(@FiString,@SqlString)

    if(@count>0)
    begin
    set @SqlString=replace(@SqlString,@FiString,'')
    end

    set @FiString='create'
    set @count= CHARINDEX(@FiString,@SqlString)

    if(@count>0)
    begin
    set @SqlString=replace(@SqlString,@FiString,'')
    end

    set @FiString='alter'
    set @count= CHARINDEX(@FiString,@SqlString)

    if(@count>0)
    begin
    set @SqlString=replace(@SqlString,@FiString,'')
    end

    return @SqlString

    end


    GO

    这个为通用分割函数:第一个参数为分割前的字符串,第二个参数为分割字符

    USE [Db]
    GO
    /****** Object: UserDefinedFunction [dbo].[f_splitstr] Script Date: 09/30/2013 21:26:37 ******/
    SET ANSI_NULLS ON
    GO
    SET QUOTED_IDENTIFIER ON
    GO
    ALTER function [dbo].[f_splitstr](@SourceSql varchar(8000),@StrSeprate varchar(100))
    returns @temp table(F1 varchar(100))
    as
    begin
    declare @ch as varchar(100)
    set @SourceSql=@SourceSql+@StrSeprate
    while(@SourceSql<>'')
    begin
    set @ch=left(@SourceSql,charindex(@StrSeprate,@SourceSql,1)-1)
    insert @temp values(@ch)
    set @SourceSql=stuff(@SourceSql,1,charindex(@StrSeprate,@SourceSql,1),'')
    end
    return
    end

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  • 原文地址:https://www.cnblogs.com/ITHomes/p/3465751.html
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