存储过程

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