update user set password=#{password} where username=#{username} select * from user where username = #{username} and password = #{password}; insert into user(username,password,email,create_time,update_time,type,school,avatar) values(#{username},#{password},#{email},#{createTime},#{updateTime},#{type},#{school},#{avatar}) select id,username,password,email,create_time,type from user delete from user where id = #{id} select count(*) from user where type = 0