Question

但是使用Replace i在条件和连接条件之后更改了表模式，但是一个条件失败。

任何人都可以帮助我

示例：

Declare @Var Nvarchar(Max)

    Set @Var='sampleid in (SELECT t1.id from EmployeesView t1 join Emp t2 t1.id=t2.id WHERE t1.l5 IN (SELECT t2.id from org t2, 
    org t3,org t4 WHERE t2.l >= t3.f AND t2.l <= t3.r AND t3.id = ''40'') AND t1.lstnm = ''kc'')'


Select Replace(Replace(Convert(Varchar(Max),@Var),'from ','from AB.'),'join ','join AB.')

O / P：

sampleid in (SELECT t1.id from AB.EmployeesView t1 join AB.Emp t2 t1.id=t2.id WHERE t1.l5 IN (SELECT t2.id from AB.org t2, 
org t3,org t4 WHERE t2.l >= t3.f AND t2.l <= t3.r AND t3.id = '40') AND t1.lstnm = 'kc')

但是预期的O / P：

sampleid in (SELECT t1.id from AB.EmployeesView t1 join AB.Emp t2 t1.id=t2.id WHERE t1.l5 IN (SELECT t2.id from AB.org t2, 
TM.org t3,TM.org t4 WHERE t2.l >= t3.f AND t2.l <= t3.r AND t3.id = '40') AND t1.lstnm = 'kc')

Answer 1

试试这个：

Select Replace(Replace(Replace(Replace(Convert(Varchar(Max),@Var),'from ','from AB.'),'join ','join AB.'), 'org', 'TM.org'), 'AB.TM', 'AB')

Answer 2

最好的方法是功能

创建功能TM.GetSplit （ @SqlTxt varchar（Max））返回nvarchar（Max）如开始声明@txt nvarchar（Max），@ originalTxt nvarchar（Max），@ orgtxt nvarchar（max），@ split nvarchar（max），@ start int，@ end int，@ len int

Select @originalTxt = @SqlTxt, @orgtxt=@SqlTxt

Set @len=LEN(@orgtxt)

While @len > 0
    Begin       
        Set @len=LEN(@orgtxt)   
        Select @start=CHARINDEX('from',@orgtxt)
        Select @end=CHARINDEX('where',@orgtxt)


        If(@start != 0 and @end!=0)
            Begin
                set @split = Substring(@orgtxt, @start, @end-@start)

                Set @orgtxt = SUBSTRING(@orgtxt,@end + 5 ,@len-@end)

                Set @txt=@split

                Select @split=Replace(Replace(Replace(Convert(Varchar(Max),@split),'from ','from AB.'),'join ','join AB.') ,',',', AB.')

                Select @originalTxt=REPLACE(@originalTxt,@txt,@split)

                Set @txt=@originalTxt
            End
        Else
            Begin
                break
            End
    End

    If @txt is null
        Begin
            Select @txt=Replace(Replace(Convert(Varchar(Max),@originalTxt),'from ','from AB.'),'join ','join AB.')
        End

return @txt

结束

Sql Dynamic Query替换表架构

2 个答案: