MySQL - 使用分组条件查询

Question

嗨，

我有像上面的图片一样的行表，我想总结所有行的QTY，但我需要排除AISLE = POS和QTY＆lt;的行。 0在同一行。

我试图得到我想要的但我无法找到解决方案：

SELECT
  ROUND(SUM(QTY),
  2) AS INVENTORY
FROM
  INV_QTY_LOCATION
WHERE
  PRODUCT = 143459 AND AISLE != 'PHY' AND AISLE != 'RET' AND case when AISLE = 'POS' AND QTY > 0

另一次尝试

SELECT
  ROUND(SUM(QTY),
  2) AS INVENTORY
FROM
  INV_QTY_LOCATION
WHERE
  PRODUCT = 143459 AND AISLE != 'PHY' AND AISLE != 'RET' AND (AISLE = 'POS' AND QTY > 0)

在这种特殊情况下，结果应该是161。

解决方案

SELECT
  ROUND(
    SUM(
      CASE WHEN(AISLE = 'POS' AND QTY > 0) OR AISLE != 'POS' THEN QTY ELSE 0
    END
  ),
  2
) AS INVENTORY
FROM
  INV_QTY_LOCATION
WHERE
  PRODUCT = 143459 AND AISLE != 'PHY' AND AISLE != 'RET'

Answer 1

我想指出NOT IN对此查询有帮助：

WHERE PRODUCT = 143459 AND
      AISLE NOT IN ('PHY', 'RET') AND
      (AISLE <> 'POS' OR QTY > 0)

注意：这假定AISLE永远不会NULL。

或者，或者：

WHERE PRODUCT = 143459 AND
      AISLE NOT IN ('PHY', 'RET') AND
      NOT (AISLE = 'POS' AND QTY > 0)

Answer 2

你的第二个陈述几乎是正确的，但既然你试图＆＃34;排除AISLE = POS＆＃34;，那么它应该是AISLE <> 'POS'：

SELECT
  ROUND(SUM(QTY),
  2) AS INVENTORY
FROM
  INV_QTY_LOCATION
WHERE
  PRODUCT = 143459 AND AISLE != 'PHY' AND AISLE != 'RET' AND (AISLE <> 'POS' OR QTY > 0)

Answer 3

尝试使用

AND (AISLE <> 'POS' OR QTY >= 0)