在Cloudera SQL中重命名属性

Question

如何在Cloudera中的create语句中重命名变量的属性？

CREATE TABLE new
STORED AS PARQUET AS
SELECT DISTINCT
customer_number,
created_at,
service
From old;

我想在变量＆＃39; service＆＃39;中重命名。 ： 打电话给我=电话 给我发电子邮件=电子邮件

Answer 1

您可以使用case：

CREATE TABLE new STORED AS PARQUET AS
    select distinct customer_number, created_at,
           (case when service = 'Call me' then 'phone'
                 when service = 'Email me' then 'email'
                 else service
            end) as service
    from old;