基于列的值生成命令--sql

Question

我有一张ID_DATA表，下面有记录

_id _data

3   test
5   tested

我需要生成一个插件sql，如下所示

insert into ID_DATA_QURY values ('test');
insert into ID_DATA_QURY values ('test');
insert into ID_DATA_QURY values ('test');
insert into ID_DATA_QURY values ('tested');
insert into ID_DATA_QURY values ('tested');
insert into ID_DATA_QURY values ('tested');
insert into ID_DATA_QURY values ('tested');
insert into ID_DATA_QURY values ('tested');

输出应该基于_ID中的值，前3个插入基于值3和数据＆＃34;测试＆＃34;接下来是5＆＃34;测试＆＃34;

首先需要你的帮助或示例。

Answer 1

从SQL Server 2008，您可以使用CROSS APPLY表运算符：

DECLARE @T TABLE (ID INT, DATA VARCHAR(10))
INSERT INTO @T 
SELECT 3, 'Test' UNION
SELECT 5, 'Tested'

SELECT 'insert into ID_DATA_QURY values (' + T.DATA + ');' AS Command
FROM @T AS T
CROSS APPLY (SELECT N
             FROM (SELECT 1 AS N UNION
                   SELECT 2 UNION
                   SELECT 3 UNION
                   SELECT 4 UNION
                   SELECT 5) AS I
             WHERE N <= T.ID) AS M
ORDER BY T.ID;

<强>更新

否则在以前版本的SQL Server中使用它（也应该在MySQL上使用）：

DECLARE @T TABLE (ID INT, DATA VARCHAR(10))
DECLARE @I TABLE (N INT)
INSERT INTO @T (ID, DATA)
VALUES (3, 'Test')
      ,(5, 'Tested')

-- You can replace it with a table filled with integer numbers.
INSERT INTO @I (N)
VALUES (1),(2),(3),(4),(5)

SELECT 'insert into ID_DATA_QURY values (' + T.DATA + ');' AS Command
FROM @T AS T
CROSS JOIN (SELECT N
            FROM @I) AS M
WHERE N <= T.ID
ORDER BY T.ID;

根据需要进行调整。