Question

有人可以帮助转换下面Oracle中的Hive查询吗？

select * 
  from tbl_my_details a 
 where decode(a.my_code,'ALL','99','01','01','02','02','03','03','04','04','06','06',
                 'Other') = a.my_content

Answer 1

您可以按以下方式使用case..when结构：

select *
  from tbl_my_details a
 where (
        case 
        when a.my_code = 'ALL' then '99'
        when a.my_code in ('01','02','03','04','06') then a.my_code
        else 'Other'
        end 
       ) = a.my_content;

Answer 2

在两个数据库中，最好使用简单的布尔逻辑：

select * 
from tbl_my_details a 
where (a.my_code in ('01', '02', '03', '04', '06') and a.my_content = a.my_code) or
      (a.my_code = 'ALL' and a.my_content = '99') or
      (a.my_code not in ('01', '02', '03', '04', '06', 'ALL') and a.my_content = 'Other')

WHERE子句中的Hive中的DECODE函数

2 个答案: