1.CREATE TABLE user (
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2.username
varchar(20),
3.password varchar(20),
4.level varchar(20),
5.PRIMARY KEY(username)
6.);
1.INSERT INTO `user`
VALUES ('a', 'pass1', 'admin');
2.INSERT INTO `user`
VALUES ('b', 'pass2', 'admin');
3.INSERT INTO `user`
VALUES ('c', 'pass3', 'user');
4.INSERT INTO `user`
VALUES ('d', 'pass4', 'user');
5.INSERT INTO `user`
VALUES ('e', 'pass5', 'user');