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mysql(创建存储过程和函数.2)

infgrad 2022-11-04 阅读 84

DELIMITER &&

CREATE PROCEDURE pro_user()

BEGIN

DECLARE a,b VARCHAR(20) ;

INSERT INTO t_user VALUES(NULL,a,b);

END

&&

DELIMITER ;



DELIMITER &&

CREATE PROCEDURE pro_user2()

BEGIN

DECLARE a,b VARCHAR(20) ;

SET a='java1234',b='123456';

INSERT INTO t_user VALUES(NULL,a,b);

END

&&

DELIMITER ;



DELIMITER &&

CREATE PROCEDURE pro_user3()

BEGIN

DECLARE a,b VARCHAR(20) ;

SELECT userName2,password2 INTO a,b FROM t_user2 WHERE id2=1;

INSERT INTO t_user VALUES(NULL,a,b);

END

&&

DELIMITER ;





DELIMITER &&

CREATE PROCEDURE pro_user4()

BEGIN

DECLARE a,b VARCHAR(20) ;

DECLARE cur_t_user2 CURSOR FOR SELECT userName2,password2 FROM t_user2;

OPEN cur_t_user2;

FETCH cur_t_user2 INTO a,b;

INSERT INTO t_user VALUES(NULL,a,b);

CLOSE cur_t_user2;

END

&&

DELIMITER ;



DELIMITER &&

CREATE PROCEDURE pro_user5(IN bookId INT)

BEGIN

SELECT COUNT(*) INTO @num FROM t_user WHERE id=bookId;

IF @num>0 THEN UPDATE t_user SET userName='java12345' WHERE id=bookId;

ELSE

INSERT INTO t_user VALUES(NULL,'2312312','2321312');

END IF ;

END

&&

DELIMITER ;



DELIMITER &&

CREATE PROCEDURE pro_user6(IN bookId INT)

BEGIN

SELECT COUNT(*) INTO @num FROM t_user WHERE id=bookId;

CASE @num

WHEN 1 THEN UPDATE t_user SET userName='java12345' WHERE id=bookId;

WHEN 2 THEN INSERT INTO t_user VALUES(NULL,'2312312','2321312');

ELSE INSERT INTO t_user VALUES(NULL,'231231221321312','2321312321312');

END CASE ;

END

&&

DELIMITER ;





DELIMITER &&

CREATE PROCEDURE pro_user7(IN totalNum INT)

BEGIN

aaa:LOOP

SET totalNum=totalNum-1;

IF totalNum=0 THEN LEAVE aaa ;

ELSE INSERT INTO t_user VALUES(totalNum,'2312312','2321312');

END IF ;

END LOOP aaa ;

END

&&

DELIMITER ;







DELIMITER &&

CREATE PROCEDURE pro_user8(IN totalNum INT)

BEGIN

aaa:LOOP

SET totalNum=totalNum-1;

IF totalNum=0 THEN LEAVE aaa ;

ELSEIF totalNum=3 THEN ITERATE aaa ;

END IF ;

INSERT INTO t_user VALUES(totalNum,'2312312','2321312');

END LOOP aaa ;

END

&&

DELIMITER ;



DELIMITER &&

CREATE PROCEDURE pro_user9(IN totalNum INT)

BEGIN

REPEAT

SET totalNum=totalNum-1;

INSERT INTO t_user VALUES(totalNum,'2312312','2321312');

UNTIL totalNum=1

END REPEAT;

END

&&

DELIMITER ;



DELIMITER &&

CREATE PROCEDURE pro_user10(IN totalNum INT)

BEGIN

WHILE totalNum>0 DO

INSERT INTO t_user VALUES(totalNum,'2312312','2321312');

SET totalNum=totalNum-1;

END WHILE ;

END

&&

DELIMITER ;



CALL pro_user();



CALL pro_user2();



CALL pro_user3();



CALL pro_user4();



CALL pro_user5(5);



CALL pro_user6(6);



CALL pro_user7(11);



CALL pro_user8(11);



CALL pro_user9(11);



CALL pro_user10(10);





DELETE FROM t_user;

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