mysql语法问题

[TrojanSckiss]

如何定义变量和循环,和遍历记录集.?
example:
set @i:=100
.......????

3Q~~

[huailairen]

不明白楼主要做什么

[klan]

参考：
CREATE PROCEDURE curdemo()
BEGIN
DECLARE done INT DEFAULT 0;
DECLARE a CHAR(16);
DECLARE b,c INT;
DECLARE cur1 CURSOR FOR SELECT id,data FROM test.t1;
DECLARE cur2 CURSOR FOR SELECT i FROM test.t2;
DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done = 1;

OPEN cur1;
OPEN cur2;

REPEAT
FETCH cur1 INTO a, b;
FETCH cur2 INTO c;
IF NOT done THEN
IF b < c THEN
INSERT INTO test.t3 VALUES (a,b);
ELSE
INSERT INTO test.t3 VALUES (a,c);
END IF;
END IF;
UNTIL done END REPEAT;

CLOSE cur1;
CLOSE cur2;
END

[allright_flash]

set @A=0;
select @A:=@A+1 as rownum,id from user