數據庫練習

-- 新建數據庫
CREATE DATABASE `school`;

-- 使用數據庫
USE `SCHOOL`;

-- 建立字段
-- id:學生的ID
-- name:學生名稱
-- nickname：學生暱稱
-- sex：性別
-- in_time:入學時間

CREATE TABLE `student`(
	`id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
	`name` VARCHAR(20) NOT NULL,
	`nickname` VARCHAR(20) NULL,
	`sex` SMALLINT NOT NULL,
	`in_time` DATETIME NULL
);

-- 插入語句
INSERT INTO `student` VALUES(1,'張三','三哥','1',now())

-- 插入自增語句
INSERT INTO `student`(`name`,`sex`) VALUES
	('張三1','1'),
	('張三2','2'),
	('張三3','1')
;

-- 查詢語句
SELECT `name`,`nickname` FROM `student`;
SELECT `id`,`name`,`nickname` FROM `student` WHERE `sex`='1';
SELECT `id`,`name`,`nickname` FROM `student` WHERE `sex`='1' ORDER BY `id` DESC;
SELECT `id`,`name`,`nickname` FROM `student` WHERE `sex`='1' ORDER BY `id` DESC LIMIT 0,2;

-- 修改語句
UPDATE `student` SET `sex`='2' WHERE `sex`='1';
UPDATE `student` SET `sex`='2',`nickname`='沒有暱稱';

-- 刪除語句
DELETE FROM `student` WHERE `sex`='1';

安裝client

pip install mysqlclient