Sql 转换子查询

如何将此子查询转换为join查询或更简单的查询，如

SELECT *
FROM ViewBuy99
WHERE Id NOT IN (
        SELECT Id
        FROM Buy99
        )

INSERT INTO Buy99
SELECT *
FROM ViewBuy99
WHERE Id NOT IN (
        SELECT Id
        FROM Buy99
        )

---

您可以使用

JOIN

将其表示为：

insert into Buy99
    select vb.*
    from ViewBuy99 vb left join
         Buy99 b
         on b.id = vb.id
    where b.id is null;

但是，我建议

不存在

：

insert into Buy99
    select vb.*
    from ViewBuy99 vb 
    where not exists (select 1 
                      from Buy99 b
                      where b.id = vb.id
                     );

---

我们不是都喜欢真正的

反连接

语法：-(