【mysql技巧】如何在这个mysql语句执行前加个前提，也就是只有表里没有相同数据才进行添加插入操作

INSERT INTO `guild_nakadai`.`admin_role_permission` (`role_id`, `permission_id`, `type`) 
VALUES (
    (SELECT id FROM `guild_nakadai`.`admin_roles` WHERE name="员工"),
    (SELECT id FROM `guild_nakadai`.`admin_permissions` WHERE name="基础数据汇总"),
  3
);

INSERT IGNORE INTO `guild_nakadai`.`admin_role_permission` (`role_id`, `permission_id`, `type`) 
SELECT 
    (SELECT id FROM `guild_nakadai`.`admin_roles` WHERE name="员工"),
    (SELECT id FROM `guild_nakadai`.`admin_permissions` WHERE name="基础数据汇总"),
    3
FROM dual
WHERE NOT EXISTS (
    SELECT 1 
    FROM `guild_nakadai`.`admin_role_permission` 
    WHERE 
        role_id = (SELECT id FROM `guild_nakadai`.`admin_roles` WHERE name="员工") 
        AND permission_id = (SELECT id FROM `guild_nakadai`.`admin_permissions` WHERE name="基础数据汇总") AND type = 3
);