insert into im_user_contact (`user_id`,`friend_id`,`remark`,`status`,`online`) values (#{userId},#{friendId},#{remark},#{status},#{online}) insert into im_user_contact (`user_id`,`friend_id`,`remark`,`status`,`online`) values (#{item.userId},#{item.friendId},#{item.remark},#{item.status},#{item.online}) update im_user_contact set update_time=now(),`online`=#{online} where friend_id=#{userId} select * from im_user_contact contact where contact.user_id=#{userId} select * from im_user_contact where user_id=#{userId} select * from im_user_contact where user_id=#{userId} and friend_id=#{friendId} select * from im_user_contact contact where contact.user_id=#{userId} and contact.friend_id not in (select user_id from group_member where group_id=#{groupId} and user_id!=#{userId})