Sql - SQL错误[156] [S1000]：关键字'as'附近的语法不正确

Question

以下是我的查询 -

DELETE
FROM activity_details as ad, edit_details as ed
LEFT JOIN edit_details as ed
ON ed.details_id = ad.row_id
WHERE year(ad.activity_datetime)  = year(GETDATE())-10

我收到错误SQL错误[156] [S1000]：关键字'as'附近的语法不正确。 SQL错误[156] [S1000]：关键字“as”附近的语法不正确。

你能帮我纠正一下语法吗？

Answer 1

改变如下。如果在delete语句中使用alias，则需要使用FROM名称删除。

DELETE ad
FROM activity_details as ad
LEFT JOIN edit_details as ed
ON ed.details_id = ad.row_id
WHERE year(ad.activity_datetime)  = year(GETDATE())-10

Answer 2

在delete之后添加别名

 DELETE ad
    FROM activity_details as ad
    LEFT JOIN edit_details as ed
    ON ed.details_id = ad.row_id
    WHERE year(ad.activity_datetime)  = year(GETDATE())-10

Answer 3

您需要在delete子句中使用别名，然后使用FROM。我还建议不要使用year(ad.activity_datetime)并使用SARGable查询：

DELETE ad
FROM activity_details ad
     LEFT JOIN edit_details ed ON ed.details_id = ad.row_id
WHERE ad.activity_datetime >= DATEADD(YEAR,DATEDIFF(YEAR, 0, GETDATE()-10),0)
  AND ad.activity_datetime < DATEADD(YEAR,DATEDIFF(YEAR, 0, GETDATE()-9),0);