--------创建表
CREATE TABLE `person`(
`number` INT(4) AUTO_INCREMENT COMMENT ‘序号‘,
PRIMARY KEY(number),
`name` VARCHAR(50) NOT null COMMENT ‘姓名‘,
`sex` CHAR(2) COMMENT ‘性别‘,
`bornDate` DATETIME COMMENT ‘出生日期‘
)
--------修改表名
ALTER TABLE `person` RENAME `tb_person`;
-------删除字段
ALTER TABLE `tb_person` DROP `bornDate`;
-----添加字段
ALTER TABLE `tb_person` ADD `bornDate` DATE;
-------修改字段
ALTER TABLE `tb_person` CHANGE `name` `id` BIGINT;
-------添加主键约束
ALTER TABLE `grade` ADD CONSTRAINT `PK_grade` PRIMARY KEY `grade`(`gradeId`);
-------添加外键约束
ALTER TABLE `student` ADD CONSTRAINT fk_student_grade FOREIGN KEY(`gradeId`)
REFERENCES `grade`(`gradeId`);
原文地址:https://www.cnblogs.com/BingBing-Deng/p/9225454.html
时间: 2024-08-09 03:45:58