学习MYSQL

docs/MySQL/test/用嘉盛的权限数据库练习更新和插入，学习了更新内连接.sql

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+UPDATE sys_menu SET menu_name = '管加工厂' WHERE menu_id = 3381;
+
+SET @pid = (SELECT menu_id FROM sys_menu WHERE menu_name = '管加工厂' LIMIT 1);
+
+INSERT INTO sys_menu(menu_name, parent_id, path, perms, create_by, create_time, remark) VALUE ('生产填报', @pid, '$2/Work/YAOA/productionAndLineReport', 'productionAndLineReport', 'admin', NOW(), '生产上报');
+
+SET @id = (SELECT menu_id FROM sys_menu WHERE menu_name = '生产填报');
+
+UPDATE sys_menu SET parent_id = @id WHERE menu_name = '原料月报';
+UPDATE sys_menu SET parent_id = @id WHERE menu_name = '生产日报';
+UPDATE sys_menu SET parent_id = @id WHERE menu_name = '质检日报';
+UPDATE sys_menu SET parent_id = @id WHERE menu_name = '质检月报';
+
+# 下面是练习
+
+
+UPDATE sys_menu AS sm1
+    JOIN (
+        SELECT menu_id
+        FROM sys_menu
+        WHERE menu_name = '生产填报'
+    ) AS sm2 ON sm1.menu_name = '原料月报'
+SET sm1.parent_id = sm2.menu_id WHERE sm1.menu_name = '原料月报';
+
+
+SELECT sm1.father_id, sm2.parent_id, sm2.menu_name, sm2.menu_id
+FROM
+    (SELECT menu_id as father_id FROM sys_menu WHERE menu_name = '生产填报') AS sm1
+        INNER JOIN
+    (SELECT menu_id, parent_id, menu_name FROM sys_menu WHERE menu_name = '原料月报') AS sm2