Question

我有以下查询：

SELECT SN,SUM(QTY) FROM SP GROUP BY SN HAVING SUM(QTY)>(SELECT AVG(SUM(QTY)) FROM (SELECT SUM(QTY) FROM SP GROUP BY SN ))

现在我收到了错误：

“每个派生表都必须有自己的别名”。

Answer 1

如错误所示，您必须为每个派生表命名。

尝试以下方法：

SELECT SN, SUM(QTY)
FROM SP
GROUP BY SN
HAVING SUM(QTY) > (
    SELECT AVG(z)
    FROM (
      SELECT SUM(QTY) z
      FROM SP
      GROUP BY SN
      ) a
    )

每个派生表都必须有自己的别名

1 个答案: