跨多個數據庫查詢表

Question

所有......我需要一種方法來跨多個數據庫查詢相同的表。 我有大約30多個數據庫，他們都有相同的表。

    SELECT 
      a.name
      , a.address
      , b.company_id
      , c.part_no
      , c.cost
    FROM accounts a
    JOIN business b on a.whatever = b.whatever
    JOIN crazy c ON b.things = c.things

像這樣簡單，但在所有數據庫中。 重點不是加入多個數據庫，這很簡單，它同時在所有數據庫中運行。 必須有一個比創建一個冗長的存儲過程更簡單的方法，不是嗎？

Answer 1

CREATE PROC dbo.alldatabasequery 
AS 

 CREATE TABLE #temp (
 databasename varchar(500),
 name varchar(max),
 address varchar(max),
 company_id varchar(max),
 cost varchar(max)
 )
INSERT INTO #temp 
 EXEC sp_MSforeachdb N'IF ''?'' NOT IN ( ''model'',''tempdb'',''master'',''msdb'')
  BEGIN 
  SELECT databasename=''?'' 
    , a.name
    , a.address
    , b.company_id
    , c.part_no
    , c.cost
    FROM ?.dbo.accounts a
    JOIN ?.dbo.business b 
    on a.whatever = b.whatever
    JOIN ?.crazy c
    ON b.things = c.things
   END' ; 

SELECT   * FROM #temp 


GO 

EXEC dbo.alldatabasequery 

Answer 2

試試這個

CREATE TABLE #temp (
 databasename varchar(500),
 name varchar(max),
 address varchar(max),
 company_id varchar(max),
 cost varchar(max)
 )


DECLARE @statement varchar(max)=''

     declare cur cursor FOR
 select name
   from master.dbo.sysdatabases
  where dbid >4

      open cur

 DECLARE @name  VARCHAR(8000)


      fetch next from cur into @name

      while @@fetch_status = 0

      begin

   SET @statement='SELECT databasename='''+@name+''', a.name
    , a.address
    , b.company_id
    , c.part_no
    , c.cost
    FROM '+@name+'.dbo.accounts a
    JOIN '+@name+'.dbo.business b 
    on a.whatever = b.whatever
    JOIN '+@name+'.crazy c
    ON b.things = c.things'

  INSERT INTO #temp 
  EXEC (@statement)
   fetch next from cur into @name
     end
    close cur
    deallocate cur

SELECT   * FROM #temp 

Answer 3

本文可能有您正在尋找的解決方案。

http://www.sqldbadiaries.com/2010/10/09/run-a-query-against-multiple-instances-using-ssms/