似乎无法找到语法错​​误

Question

有人可以告诉我这里我做错了什么，我在附近的语法不正确。这个陈述怎么了？

INSERT INTO dbo.a1
    select x1 as id, x2 as enc_id, x3 as dev,x4 as mang, x4 as sre, x5 as phase,x6, x7, x8
    from
    (select *,
    row_number() over(partition by x2 order by x8)  as rank
    from ccsm.n9 where xx=1 and xx_pat=1 and xx_encz='Tesz')
     where rank=1;

Answer 1

您从未告诉我们您使用的SQL版本，但有一种可能性是您的派生表需要别名：

INSERT INTO dbo.a1
SELECT t.x1, t.x2, t.x3, t.x4, t.x4, t.x5, t.x6, t.x7, t.x8
FROM
(
    SELECT *,
        ROW_NUMBER() OVER (PARTITION BY x2 ORDER BY x8) AS rank
    FROM ccsm.n9
    WHERE xx = 1 and xx_pat = 1 and xx_encz = 'Tesz'
) t
WHERE t.rank = 1;

我知道Oracle强制执行派生表别名规则，也可能执行其他数据库。请注意，SELECT语句中的别名没有用处，因为只是插入了值。如果您希望两次插入x4，则只需重复两次。