Question

以下语法在Postgresql中可以正常工作：

SELECT
    rev_count.RevName,
    rev_count.MovTitle
FROM
    (SELECT
         rev.name as RevName,
         m.title as MovTitle,
         rat.stars as OrginalRat,
         rat.ratingDate as RatingDate,
         count(rat.stars) OVER (PARTITION BY rev.name, m.title) as RevCount,
         lead(rat.stars, 1) OVER (PARTITION BY rev.name, m.title ORDER BY rat.ratingDate) as NewRat
    FROM
        rating as rat
    LEFT JOIN
        reviewer as rev
    ON
        rat.rid = rev.rid
    LEFT JOIN
        movie as m
    ON
        rat.mid = m.mid) as rev_count
WHERE 
    rev_count.RevCount = 2
    AND rev_count.NewRat IS NOT NULL
    AND rev_count.NewRat > rev_count.OrginalRat

但是我在SQLite中收到以下错误：未捕获的错误：“（”附近：语法错误

这是为什么的任何线索？我怀疑这与Aliasing有关，但不确定问题出在哪里。

Answer 1

您的查询通常存在语法错误，因此根本无法使用。您可以在此处检查语法： https://www.eversql.com/sql-syntax-check-validator/ SQLite不支持db引擎中的某些功能，例如PostreSQL或mySQL。有关详细信息，请参阅文档。

Answer 2

此查询在SQLite 3.25.0中可以正常工作。（早期版本还没有窗口功能。）

未捕获的错误：在“（”附近：在SQLite中运行明显正确的语句时的语法错误

2 个答案: