INSERT INTO sys_menu_collect (user_id, menu_id) VALUES (#{userId}, #{menuId}) DELETE FROM sys_menu_collect WHERE user_id = #{userId} AND menu_id = #{menuId} DELETE FROM sys_menu_collect WHERE user_id = #{userId} SELECT COUNT(1) FROM sys_menu_collect WHERE user_id = #{userId} AND menu_id = #{menuId} SELECT smc.id, smc.user_id, smc.menu_id, smc.collect_time, sm.menu_name, sm.path, -- 仅查当前菜单的原始path，用于Java拼接 sm.parent_id -- 仅查当前菜单的父级ID，用于追溯上级 FROM sys_menu_collect smc LEFT JOIN sys_menu sm ON smc.menu_id = sm.menu_id WHERE smc.user_id = #{userId} ORDER BY smc.collect_time DESC SELECT COUNT(DISTINCT user_id) FROM sys_menu_collect WHERE menu_id = #{menuId} SELECT menu_id AS menuId, parent_id AS parentId, path AS path FROM sys_menu