Question

我正在为Oracle数据库编写SQL，其中包含用于计算的Case When语句。目前的方法如＆＃39; 1＆＃39;不会给我所有的整数，所以我正在寻找一种方法来说明NBR_UNITS / STD_PACK_QTY是否是一个整数然后＆＃39;案例选择＆＃39;如果它是小数点，则单位选择＆＃39;。

下面是SQL现在的部分：

CASE
WHEN (NBR_UNITS/STD_PACK_QTY) like '1' THEN 'Case Pick'
WHEN (NBR_UNITS/STD_PACK_QTY) < '1' THEN 'Unit Pick'
ELSE 'Error'
END "Case Picks"

以下是数据示例。我试图让SQL输出＆＃39; Case Pick＆＃39;如果除法计算是任何整数，然后是“单位选择”。如果是小数点。

Data Set

谢谢！

Answer 1

检查任何数字表达式x是否为整数的标准方法是

case when x = round(x) then ...
     when x < 1        then...
     else                  ...   end   as ....

（假设与1比较是正确的;不确定，我在原帖后面的评论中提出了澄清问题。）

Answer 2

此特定示例的最简单解决方案是使用MOD函数。

CASE
WHEN MOD(NBR_UNITS,STD_PACK_QTY) > 0 THEN 'Case Pick'
WHEN MOD(NBR_UNITS,STD_PACK_QTY) = 0 THEN 'Unit Pick'
END "Case Picks"

Answer 3

将分区与分区的trunc / floor / round down进行比较。

WHEN (NBR_UNITS/STD_PACK_QTY) = TRUNC(NBR_UNITS/STD_PACK_QTY) THEN 'Case Pick'

不确定您的规则是否可以使用ELSE来捕获其他所有内容 - 例如，如果案例数量是24而他们给你36，那可以吗？如果是这样，那么ELSE基本上捕获了其他一切，对吧？如果这不合适，单位数量只适用于＆lt; 24，然后ELSE (NBR_UNITS/STD_PACK_QTY) < 1工作，ELSE可能是错误。

Answer 4

由于整数超出9，因此您可以考虑使用TRUNC（）函数。它删除了结果的小数部分。因此，当TRUNC（Result）等于Result时，Result为整数。

    WITH
     "Data" AS
        (
            SELECT 1 AS NBR_UNITS, 8 AS STD_PACK_QTY FROM dual
            UNION
            SELECT 2 AS NBR_UNITS, 8 AS STD_PACK_QTY FROM dual
            UNION
            SELECT 3 AS NBR_UNITS, 8 AS STD_PACK_QTY FROM dual
            UNION
            SELECT 4 AS NBR_UNITS, 8 AS STD_PACK_QTY FROM dual
            UNION
            SELECT 5 AS NBR_UNITS, 8 AS STD_PACK_QTY FROM dual
            UNION
            SELECT 6 AS NBR_UNITS, 8 AS STD_PACK_QTY FROM dual
            UNION
            SELECT 7 AS NBR_UNITS, 8 AS STD_PACK_QTY FROM dual
            UNION
            SELECT 8 AS NBR_UNITS, 8 AS STD_PACK_QTY FROM dual
            UNION
            SELECT 9 AS NBR_UNITS, 8 AS STD_PACK_QTY FROM dual
        )
SELECT
     NBR_UNITS
    ,STD_PACK_QTY
    ,NBR_UNITS/STD_PACK_QTY     AS "Ratio"
    ,CASE
        WHEN (TRUNC(NBR_UNITS/STD_PACK_QTY) = NBR_UNITS/STD_PACK_QTY)   THEN    'Case Pick'
        WHEN (TRUNC(NBR_UNITS/STD_PACK_QTY) < 1)                    THEN    'Unit Pick'
        ELSE                                                'Error'
     END                        AS "Case Picks"
FROM "Data"
;

Case当语句识别整数/非整数时

4 个答案: