SQL CASE WHEN 用于多列中的多个值

Question

我查看了其他可能与此类似的问题，但我面临的问题有点不同，我找不到任何方法来解决我正在尝试做的事情。

我有两列，品牌和类别。 我必须根据适合该角色的品牌或类别的值为客户 ID 分配一个值。

下面是我的代码 -

CREATE TABLE database.customer_audience_labeled
AS
select m.cust_id, CASE 
                WHEN (m.category IN ('cat_1','cat_2') OR m.brand_id IN ('brand_1','brand_2')) THEN "Sports_Enthusiast"
                WHEN (m.category IN ('cat_4','cat_5') OR m.brand_id IN ('brand_3')) THEN  "Jewellery_Shoppers"
                WHEN (m.category IN ('cat_7') OR m.brand_id IN ('brand_4','brand_5')) THEN  "Movie_Goers"
                ELSE "Others"
            END AS Custom_Audience
FROM customer_table m
GROUP BY 1

我在 Athena (Presto DB) 中执行此操作，但出现以下错误 -

SYNTAX_ERROR: line 6:702: Column 'gym_goers' cannot be resolved. You may need to manually clean the data at location 's3://aws....'

Answer 1

也许你只是想要：

CREATE TABLE database.customer_audience_labeled AS
    SELECT m.cust_id,
           (CASE WHEN (m.category IN ('cat_1','cat_2') OR m.brand_id IN ('brand_1','brand_2')) THEN 'Sports_Enthusiast'
                 WHEN (m.category IN ('cat_4','cat_5') OR m.brand_id IN ('brand_3')) THEN  'Jewellery_Shoppers'
                 WHEN (m.category IN ('cat_7') OR m.brand_id IN ('brand_4','brand_5')) THEN  'Movie_Goers'
                 ELSE 'Others'
            END) AS Custom_Audience
    FROM customer_table m
    GROUP BY 1, 2;

还要注意对字符串常量使用单引号而不是双引号。

Answer 2

我不确定原因是什么，但 OR 语句不起作用。

我删除了 OR 语句并将它们移到附加的 WHEN 语句中，它给了我结果。

    CREATE TABLE database.customer_audience_labeled AS
        SELECT m.cust_id,
               CASE WHEN m.category IN ('cat_1','cat_2') THEN 'Sports_Enthusiast'
                    WHEN m.brand_id IN ('brand_1','brand_2') THEN 'Sports_Enthusiast'
                    WHEN m.category IN ('cat_4','cat_5') THEN 'Jewellery_Shoppers'
                    WHEN m.brand_id IN ('brand_3') THEN 'Jewellery_Shoppers'
                    WHEN m.category IN ('cat_7') THEN 'Movie_Goers' 
                    WHEN m.brand_id IN ('brand_4','brand_5') THEN 'Movie_Goers'
                    ELSE 'Others'
                    END AS Custom_Audience
    FROM customer_table m
    GROUP BY 1, 2;