如何使用一个数据库表到另一个数据库的存储过程，动态传递的数据库名称

Question

现在我使用一个数据库表到另一个数据库存储过程正常（database name..table name），但我已经动态传递的数据库名称怎么写存储程序请给我任何建议

我写这样的

Select QT.Name,SC.Name as Status,QT.QuoteNumber,QT.PolicyNumber,LC.Name as LineCode,QT.DBAName as DBAName  
    from QMSV3Dev..Quote QT, QMSV3Dev..StatusCode SC, QMSV3Dev..LineCode LC  
    where QT.StatusCode = SC.StatusCode And QT.LineCode = LC.LineCode and  
    QT.DBAName like 'a%' order by QT.Name,QuoteNumber desc 

在上面的存储过程QMSV3Dev..Quote，QMSV3Dev是数据库名称和Quote是表名，这个SP像另一个数据库中执行现在

同样的查询通过数据库名称动态

CREATE Procedure [dbo].[usp_GetSearch123]  
(  
@SearchValue varchar(100),  
@SearchBy varchar(250), 
@DbName varchar(50)  
)  
AS  
Begin 
    Select QT.Name,SC.Name as Status,QT.QuoteNumber,QT.PolicyNumber,LC.Name as LineCode,QT.DBAName as DBAName   
    from @DbName+'..Quote ' QT,@DbName+'.. StatusCode' SC, @DbName+'..Linecodes' LC  
    where QT.StatusCode = SC.StatusCode And QT.LineCode = LC.LineCode and  
    (QT.Name like @SearchValue+'%' or QT.DBAName like @SearchValue+'%')  
    order by QT.Name,QuoteNumber desc 
end 

Answer 1

答案是您想象中简单。对于这一点，你必须使用Dynamic SQL。

这将是这样的：

CREATE Procedure [dbo].[usp_GetSearch123]  
(  
@SearchValue varchar(100),  
@SearchBy varchar(250), 
@DbName varchar(50)  
)  
AS  
Begin 

    Declare @cmd varchar(5000) 

    select @cmd = 
    'Select QT.Name,SC.Name as Status,QT.QuoteNumber,QT.PolicyNumber,LC.Name as LineCode,QT.DBAName as DBAName   
    from ' + @DbName + '..Quote QT, ' + @DbName + '.. StatusCode SC, ' + @DbName+'..Linecodes LC  
    where QT.StatusCode = SC.StatusCode And QT.LineCode = LC.LineCode and  
    (QT.Name like "' + @SearchValue + '%" or QT.DBAName like "' + @SearchValue +'%")  
    order by QT.Name,QuoteNumber desc' 

    exec(@cmd) 
end 

---

您创建一个varchar变量@cmd，把选择它，事后exec(@cmd)执行它。