编辑代码

CREATE DATABASE test;
use test;
/*CREATE TABLE TABLE1(
    STOCK varchar(20),
    symbol char(6),
    SHARETYPE char(1),
    TRADEDATE date,
    PRICE decimal(10,2)
);
INSERT INTO TABLE1(STOCK,SYMBOL,SHARETYPE,TRADEDATE,PRICE) VALUES('平安银行','000001','A','2021-05-20',69.97);
INSERT INTO TABLE1(STOCK,SYMBOL,SHARETYPE,TRADEDATE,PRICE) VALUES('长安B','200625','B','2021-05-20',7.11);
INSERT INTO TABLE1(STOCK,SYMBOL,SHARETYPE,TRADEDATE,PRICE) VALUES('ST星源','000005','A','2021-05-20',1.82);

INSERT INTO TABLE1(STOCK,SHARETYPE)VALUES('比亚迪','A');
use test;
ALTER TABLE TABLE1 ADD PROVINCE varchar(10);
UPDATE TABLE1 SET PRICE=70.2 WHERE STOCK='平安银行';
UPDATE TABLE1 SET PRICE=70.15,SYMBOL='000002' WHERE STOCK='平安银行';
DELETE FROM TABLE1 WHERE STOCK='平安银行';
DELETE FROM TABLE1;*/

CREATE TABLE TABLE2(
    STOCK varchar(20),
    SYMBOL char(6),
    SHARETYPE char(1),
    PRICE decimal(10,2),
    PROVINCE varchar(10)
);

INSERT INTO TABLE2(STOCK,SYMBOL,SHARETYPE,PRICE,PROVINCE) VALUES('ST星源',000005,'A',1.82,'广东省');
INSERT INTO TABLE2(STOCK,SYMBOL,SHARETYPE,PRICE,PROVINCE) VALUES('北京城乡',600861,'A',14.38,'北京市');
INSERT INTO TABLE2(STOCK,SYMBOL,SHARETYPE,PRICE,PROVINCE) VALUES('三环集团',300408,'A',37.41,'广东省');
INSERT INTO TABLE2(STOCK,SYMBOL,SHARETYPE,PRICE,PROVINCE) VALUES('万科A',000002,'A',26.77,'广东省');
INSERT INTO TABLE2(STOCK,SYMBOL,SHARETYPE,PRICE,PROVINCE) VALUES('南玻B',200012,'B',3.58,'广东省');

UPDATE TABLE2 SET PRICE=16.25 WHERE STOCK='平安银行';
DELETE FROM TABLE2 WHERE STOCK='B';
DELETE FROM TABLE2 WHERE STOCK='平安银行';
INSERT INTO TABLE2(STOCK,SYMBOL,SHARETYPE,PRICE,PROVINCE) VALUES('平安银行',000001,'A',16.25,'广东省');