编辑代码

CREATE DATABASE test;
use test;
/*
CREATE TABLE TABLE4 (
    STOCK varchar(20),
    SYMBOL char(6),
    SHARETYPE char(1),
    TRADEDATE date,
    PRICE decimal(10,2),
    province varchar(20)
);

INSERT INTO TABLE4(stock, symbol, sharetype, tradedate, price, province) VALUES('平安银行', '000001', 'A', '2023-05-15', 69.97, '广东省');
INSERT INTO TABLE4(stock, symbol, sharetype, tradedate, price, province) VALUES('长安8', '000625', 'B', '2023-05-15', 7.11, '重庆市');
INSERT INTO TABLE4(stock, symbol, sharetype, tradedate, price, province) VALUES('比亚迪', '002594', 'A', '2023-05-15', 172.78, '广东省');
INSERT INTO TABLE4(stock, symbol, sharetype, tradedate, price, province) VALUES('东信', '600941', 'B', '2023-05-15', 0.47, '浙江省');
INSERT INTO TABLE4(stock, symbol, sharetype, tradedate, price, province) VALUES('复星医药', '600196', 'A', '2023-05-15', 65.00, '上海市');
INSERT INTO TABLE4(stock, symbol, sharetype, tradedate, price, province) VALUES('ST星源', '000005', 'A', '2023-05-15', 1.82, '广东省');
INSERT INTO TABLE4(stock, symbol, sharetype, tradedate, price, province) VALUES('北京城乡', '600861', 'A', '2023-05-15', 13.38, '北京市');
INSERT INTO TABLE4(stock, symbol, sharetype, tradedate, price, province) VALUES('三环集团', '300408', 'A', '2023-05-15', 37.41, '广东省');
INSERT INTO TABLE4(stock, symbol, sharetype, tradedate, price, province) VALUES('万科A', '000002', 'A', '2023-05-15', 26.77, '广东省');
INSERT INTO TABLE4(stock, symbol, sharetype, tradedate, price, province) VALUES('南玻B', '200012', 'B', '2023-05-15', 3.58, '广东省');

SELECT * FROM TABLE4;
SELECT STOCK, SYMBOL FROM TABLE4;
SELECT STOCK, SYMBOL, PRICE 
FROM TABLE4 
WHERE PRICE BETWEEN 30 AND 100 
ORDER BY PRICE DESC;

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

INSERT INTO stock_info(stock, symbol, sharetype, price, province) VALUES('平安银行', '000001', 'A', 69.97, '广东省');
INSERT INTO stock_info(stock, symbol, sharetype, price, province) VALUES('长安B', '200625', 'B', 7.11, '重庆市');
INSERT INTO stock_info(stock, symbol, sharetype, price, province) VALUES('比亚迪', '002594', 'A', 172.78, '广东省');
INSERT INTO stock_info(stock, symbol, sharetype, price, province) VALUES('东信B', '900941', 'B', 0.47, '浙江省');

SELECT * FROM stock_info;

SELECT DISTINCT SHARETYPE FROM stock_info;

SELECT STOCK, SYMBOL FROM stock_info;

SELECT * FROM stock_info LIMIT 2;

SELECT * FROM stock_info WHERE SHARETYPE = 'A';

SELECT * FROM stock_info WHERE PRICE < 50;
SELECT STOCK FROM stock_info WHERE SHARETYPE = 'A';
SELECT * FROM stock_info WHERE SYMBOL LIKE '0%';
SELECT * FROM stock_info WHERE SYMBOL LIKE '%1';
SELECT * FROM stock_info WHERE SYMBOL LIKE '%9%';
SELECT * FROM stock_info WHERE SYMBOL not LIKE '%9%';
SELECT * FROM stock_info WHERE sharetype='A' AND PROVINCE='广东省';
SELECT * FROM stock_info WHERE PRICE=7.11 OR sharetype='B';
SELECT * FROM stock_info WHERE sharetype='B' AND(PROVINCE='广东省' OR PROVINCE='浙江省');
SELECT * FROM stock_info WHERE sharetype='A' AND PROVINCE='广东省';
SELECT * FROM stock_info WHERE PRICE not BETWEEN 0 AND 10;
SELECT * FROM stock_info ORDER BY SHARETYPE;
SELECT * FROM stock_info ORDER BY SHARETYPE,PRICE;
SELECT * FROM stock_info ORDER BY PRICE DESC;
SELECT * FROM stock_info ORDER BY SHARETYPE ASC,PRICE DESC;
*/

CREATE TABLE TABLE6 (
    Stkcd VARCHAR(20),
    Trddt DATE,
    Opnprc DECIMAL(10, 2),
    Clsprc DECIMAL(10, 2),
    Dnshrtrd BIGINT
);

INSERT INTO TABLE6 (Stkcd, Trddt, Opnprc, Clsprc, Dnshrtrd)
VALUES 
('603897', '2019-01-02', 23.01, 22.81, 2176373),
('603898', '2019-01-02', 15.33, 15.33, 852951),
('603899', '2019-01-02', 30.15, 28.86, 3435768),
('603900', '2019-01-02', 11.88, 11.82, 629531),
('603901', '2019-01-02', 6.59, 6.62, 968100),
('603903', '2019-01-02', 20.84, 20.15, 1865700),
('603906', '2019-01-02', 8.65, 8.63, 1106160),
('603908', '2019-01-02', 24.38, 24.51, 963600),
('603909', '2019-01-02', 25.52, 25.7, 1089096),
('603912', '2019-01-02', 13.32, 13.7, 4097856);

SELECT Dnshrtrd 
FROM TABLE6 
WHERE Stkcd = '603903';

SELECT Stkcd, Opnprc 
FROM TABLE6;

SELECT Stkcd, Trddt 
FROM TABLE6 
WHERE Clsprc BETWEEN 10 AND 20 
ORDER BY Dnshrtrd DESC;