SELECT a.user_id, b.role_id, c.role_name, a.account, a.password, a.person_name, a.account_balance, a.random FROM t_user a LEFT JOIN user_role b ON a.user_id = b.user_id LEFT JOIN t_role c ON b.role_id = c.role_id where a.account = #{account} and a.password = #{password} and a.user_id = #{user_id}; INSERT INTO t_user ( user_id, user_name, password, random, public_key, private_key, organization_name, person_name ) VALUES (#{item.user_id}, #{item.user_name}, #{item.password}, #{item.random}, #{item.public_key}, #{item.private_key}, #{item.organization_name}, #{item.person_name}) insert into t_user(user_id,account,password,person_name,random,public_key,private_key,account_balance,create_time,update_time)values(#{user_id},#{account},#{password},#{person_name},#{random},#{public_key},#{private_key},#{account_balance},#{create_time},#{update_time}); insert into user_role(user_id,role_id)values(#{user_id},#{role_id}); update t_user set account = #{account},password = #{password},person_name = #{person_name},account_balance = #{account_balance},update_time = #{update_time} where user_id = #{user_id}; update user_role set role_id = #{role_id} where user_id = #{user_id}; SELECT count(1) FROM t_user a LEFT JOIN user_role b ON a.user_id = b.user_id LEFT JOIN t_role c ON b.role_id = c.role_id and c.role_name = #{role_name} and a.account = #{account} and a.person_name = #{person_name} SELECT a.user_id, c.role_name, a.account, a.password, a.person_name, a.create_time, a.update_time FROM t_user a LEFT JOIN user_role b ON a.user_id = b.user_id LEFT JOIN t_role c ON b.role_id = c.role_id and c.role_name = #{role_name} and a.account = #{account} and a.person_name = #{person_name} limit #{startNum},#{endNum}; select * from t_user where user_id = #{user_id} or account = #{account}; select a.user_id,b.role_id,c.role_name,a.account,a.password,a.person_name,a.account_balance from t_user a LEFT JOIN user_role b ON a.user_id = b.user_id LEFT JOIN t_role c ON b.role_id = c.role_id where a.user_id = #{user_id};