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