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2021-10-11 40760
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2022-01-14 20708
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2020-08-27 14851
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2021-10-25 12591
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2020-09-08 7880
-- 老师表 -- timestamp 时间戳 CREATE TABLE teachers( id INT(11) PRIMARY KEY AUTO_INCREMENT, uname VA
#----------------- 主外键 多对多关系--------------------- -- 老师表 -- NOW() = current_timestamp()时间戳函数 = CUR
CREATE TABLE users( id INT(10) PRIMARY KEY AUTO_INCREMENT COMMENT 'id', uname VARCH
-- 用户表 CREATE TABLE users( id INT(10) PRIMARY KEY AUTO_INCREMENT COMMENT 'id', uname
-- 用户表 drop table grade; drop table users; CREATE TABLE users( id INT(11) PRIMARY KEY AUTO_INCRE
-- 库 -- USE demo 切换库 -- DEFAULT '' 默认值 DROP TABLE users; CREATE TABLE users( id INT(10