SQL：将视图加入表以进行查询

Posted 2023-02-26

【中文标题】SQL：将视图加入表以进行查询

【英文标题】：SQL: joining view to table for query

【发布时间】：2017-03-27 05:24:50

【问题描述】：

SELECT January.customer_id as Jancust_id,
           SUM(payments.payment) as Jan_cust_pmts,
           COUNT(DISTINCT January.customer_id) AS Jan_orig_cust,
           COUNT(DISTINCT payments.customer_id) as Jan_ret_cust,
           AVG(payments.payment) as Cust_life_rev
           January.acquisition_source as Jan_source
    FROM January_Cohort January
    LEFT JOIN telemon_payments_data payments
    ON January.customer_id = payments.customer_id
    GROUP BY Jan_source

所以上面应该是一个查询，其中 January_Cohort 是一个已经创建的视图，我想将它加入到表 telemon_payments_data。

我是不是指错了，还是不能加入表格和视图？ 错误消息是 January_Cohort 不是表；我知道，这是一种风景。

【参考方案1】：

也许它会起作用 将视图设为子查询表

SELECT January.customer_id as Jancust_id,
           SUM(payments.payment) as Jan_cust_pmts,
           COUNT(DISTINCT January.customer_id) AS Jan_orig_cust,
           COUNT(DISTINCT payments.customer_id) as Jan_ret_cust,
           AVG(payments.payment) as Cust_life_rev
           January.acquisition_source as Jan_source
    FROM (select * from January_Cohort) January
    LEFT JOIN telemon_payments_data payments
    ON January.customer_id = payments.customer_id
    GROUP BY Jan_source