数据库查询语句整理

启动MAMP数据库
/Applications/MAMP/Library/bin/mysql -u root -p
查询
SELECT * FROM `score_list`
查询 stu_id=201423250000
SELECT * FROM `score_list` WHERE stu_id=201423250000
查询 id=1且class_id=10001
SELECT * FROM `score_list` WHERE `id` = 1 AND `class_id` = 10001

删除
DELETE FROM `score_list` WHERE id=10

更新 id=1的数据stu_id-1
UPDATE `student_info` SET `stu_id`=[value-1] WHERE `id` = 1

增加数据
INSERT INTO `score_list` (`id`, `class_id`, `stu_id`, `classname`, `date`, `score`) VALUES ('5', '10003', '201423250682', '第三节', '2018-04-28', '98');

设置主键id自动增长
ALTER TABLE `score_list` MODIFY COLUMN id int(6) NOT NULL AUTO_INCREMENT FIRST;