insert into users (id, username, email, password, bio, image) values( #{user.id}, #{user.username}, #{user.email}, #{user.password}, #{user.bio}, #{user.image} ) insert into follows(user_id, follow_id) values (#{followRelation.userId}, #{followRelation.targetId}) update users username = #{user.username}, email = #{user.email}, password = #{user.password}, bio = #{user.bio}, image = #{user.image} where id = #{user.id} delete from follows where user_id = #{followRelation.userId} and follow_id = #{followRelation.targetId} select * from users where username = #{username} select id, username, email, password, bio, image from users where email = #{email} select id, username, email, password, bio, image from users where id = #{id} SELECT F.user_id followUserId, F.follow_id followTargetId from follows F where F.user_id = #{userId} and F.follow_id = #{targetId}