如何遍歷sql server中的每一行？

Question

我的查詢返回26個表名。

select name from sys.tables where name like '%JPro_VP_Service%' 

現在我試圖編寫一個查詢來檢查每個表返回從上面的查詢。

--consider this is my first table 
select * from JPro_VP_Service 
where row_id like '%1-101%' or row_id like '%1-102%' 
-- likewise I want to search in 26 tables return from above query  

我想我需要寫或光標來完成此操作。

任何人都可以幫助我如何實現這一目標？

Answer 1

是的，你將不得不使用這個cursor，大概也dynamic sql

另見

Generate dynamic SQL statements in SQL Server

Dynamic SQL PROs & CONs

Answer 2

要做到這一點，最簡單的方法是 試試這個：

SELECT 'select * from ' + name 
     + ' where row_id   like ''%1-101%'' or row_id like ''%1-102%''' 
FROM sys.tables 
WHERE name LIKE '%JPro_VP_Service%' 

您將獲得所有表格以及相同的條件。你可以一起執行它們。

Answer 3

DECLARE @mn INT 
DECLARE @mx INT 
DECLARE @tblname VARCHAR(100); 

WITH cte 
    AS (SELECT Row_number() 
        OVER ( 
        ORDER BY (SELECT 0)) AS rn, 
       name 
     FROM sys.tables 
     WHERE name LIKE '%JPro_VP_Service%') 
SELECT @mn = Min(rn), 
     @mx = Max(rn) 
FROM cte 

WHILE(@mn >= @mx) 
    BEGIN 
     SELECT @tblname = name 
     FROM cte 
     WHERE rn = @mn 

     SELECT * 
     FROM @tblname 
     WHERE row_id LIKE '%1-101%' 
       OR row_id LIKE '%1-102%' 

     --Do something else 
     SET @mn=@mn + 1 
    END 

Answer 4

這條路線可以工作，雖然你可能是想保存這些表中的結果：

DECLARE @tables TABLE(
ID INT IDENTITY(1,1), 
Name VARCHAR(100) 
) 

INSERT INTO @tables (Name) 
SELECT name 
FROM sys.tables 
WHERE name like '%JPro_VP_Service%' 

DECLARE @b INT = 1, @m INT, @table VARCHAR(100), @cmd NVARCHAR(MAX) 
SELECT @m = MAX(ID) FROM @tables 

WHILE @b <= @m 
BEGIN 

SELECT @table = Name FROM @tables WHERE ID = @b 

SET @cmd = 'select * from ' + @table + ' 
where row_id like ''%1-101%'' or row_id like ''%1-102%'' 
' 

EXECUTE sp_executesql @cmd 

SET @b = @b + 1 
SET @cmd = '' 

END