Question

我正在尝试检查自从首次致电客户以来的时间。我正在使用case语句对照当前系统时间对此进行检查。

select sale_id,case when ((CURRENT_TIMESTAMP - min(call_date) >= '500 days' THEN 'more than 500 days'
                    when ((CURRENT_TIMESTAMP - min(call_date) >= '300 days' THEN 'more than 300 days'
                    else 'Less than 300 days' end  as Aging
                    from sales

我一直在执行查询失败。无效的操作：“ THEN”或整齐的语法错误。

我正在使用Amazon Redshift DB。谁能帮忙。

Answer 1

除了括号外，您还使用了min()，而没有group by。我还怀疑sale_id代表客户。

所以，我怀疑您想要类似的东西：

select customer_id,  -- or whatever the right column is
       (case when CURRENT_TIMESTAMP - min(call_date) >= '500 days' then 'more than 500 days'
             when CURRENT_TIMESTAMP - min(call_date) >= '300 days' then 'more than 300 days'
             else 'Less than 300 days'
        end)  as Aging
from sales 
group by customer_id;

Redshift-使用Case语句时出错

1 个答案: