Question

我对使用游标有疑问。

Table t1 having "t1c1" and "t1c2" columns.

Table t2 having "t2c2" and "t2c2" columns.

Table t3 having "t3c2","t3c2","t3c3","t3c4" columns.

Two cursors "cur1" and "cur2".

我编写了代码，我需要使用for循环游标“cur1”

将值插入到t3中

示例：

DECLARE

CURSOR cur1 IS
SELECT t1c1 FROM t1;

CURSOR cur2 IS
SELECT t2c1 FROM t2;

BEGIN

FOR f1 IN cur1 LOOP

EXIT WHEN cur1%NOTFOUND;

INSERT INTO TABLE t3
(
  SELECT f1.t1c1,t2.t2c2,'hello' FROM t2;
);

END LOOP;

从上面的代码中我插入了表t3的前三列。

我想知道如何将cur2（光标值）插入表t3的第4列。

Answer 1

insert into t3
select t1.t1c1, t2.t2c2, 'Hello'
from t1,
     t2

对我来说真的很奇怪你没有提到t1和t3之间的任何联系，所以你得到了cartezian。

同一for循环中的多个游标

1 个答案: