如何使用一个数据库表到另一个数据库存储过程，动态传递数据库名称

Question

现在我将一个数据库表正常使用到另一个数据库存储过程（database name..table name），但是我已经动态传递了数据库名称如何编写存储过程请给我任何建议

我是这样写的

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中，QMSV3Dev是数据库名，Quote是表名，这个sp现在在另一个数据库如test中执行

同一查询动态传递数据库名称

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

答案比你想象的要简单。为此，您必须使用Dynamic SQL。

应该是这样的：

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 并将选择放在上面，然后由exec(@cmd) 执行它。