有没有一种方法可以通过SQL在Snowflake中创建临时表，而不必每次都写列？与，插入

Question

insert into temp
select  code, 
case when code = 'S' then 1
when code = 'U' then 0
when code = 'R' then 4 
end 
from "table" r

临时表错误-如何在雪花中创建临时表而不必注意每一列

Answer 1

Create temp table temp as
select  code, 
case when code = 'S' then 1
when code = 'U' then 0
when code = 'R' then 4 
end 
from "table" r;

Answer 2

您只需要指定与选择语句中的列列表相匹配的目标临时表的列即可。

是的，您必须指定所有列名，包括数据类型。

create table "table" ( code varchar);

insert into "table" values ('S');
insert into "table" values ('U');
insert into "table" values ('R');

select  code, 
case when code = 'S' then 1
when code = 'U' then 0
when code = 'R' then 4 
end 
from "table" r;

Create temp table temp as
select  code, 
case when code = 'S' then 1
when code = 'U' then 0
when code = 'R' then 4 
end 
from "table" r; --SQL compilation error: Missing column specification


Create temp table temp (code varchar, code_no int) as
select  code, 
case when code = 'S' then 1
when code = 'U' then 0
when code = 'R' then 4 
end as code_no
from "table" r;

select * from temp;

文档参考：https://docs.snowflake.com/en/sql-reference/sql/insert.html#optional-parameters