Question

我创建了一个包含两个Fields Date和name的Table。我已经编写了一个insert语句来插入带有来自不同表的两个select语句的值。我的查询如下：

insert into temptable with date as (select date from generate_series('2014-04-01', 
  '2014-04-30', '1 day'::interval) as date),name as (select name from table12 where id=1912)

但是Query返回的错误如下：

ERROR:  syntax error at end of input
LINE 3: ... date),name as (select name from table12 where id=1912)
                                                                  ^

查询有问题吗？这是在查询中使用'with'的正确方法吗？

Answer 1

您需要从公用表中选择表达式：

将公用表表达式（with部分）放在插入之前：

insert into temptable
with date as (
   select date 
   from generate_series('2014-04-01','2014-04-30', '1 day'::interval) as date
),
name as (
   select name 
   from table12 
   where id=1912
)
select * 
from date 
  cross join name;

作为替代方案，您可以将CTE放在插入物的前面（我个人更喜欢）：

with date as (
   select date 
   from generate_series('2014-04-01','2014-04-30', '1 day'::interval) as date
),
name as (
   select name 
   from table12 
   where id=1912
)
insert into temptable
select * 
from date 
  cross join name;

不确定您希望如何连接CTE的两个部分。

Postgres在一个查询中使用两个select语句时引发错误

1 个答案: