SQL/雪花：无效的标识符答案

【问题标题】：SQL/snowflake: invalid identifierSQL/雪花：无效的标识符
【发布时间】：2021-08-04 05:48:31
【问题描述】：

试图了解为什么我的查询会收到错误“运行查询时出错：000904 (42000)：SQL 编译错误：位置 48 处的错误行 16 无效标识符 'S1.V'”。

查询：

with step1 as (
select
    v:_id
from 
    PUBLIC.BUSINESSES 
where 
    v:created::date between DATEADD(dd, 1, last_day(DATEADD(mm, -3, GETDATE()))) and getdate()
group by 1
),

step2 as (
select
    distinct b.v:_id
from
    step1 s1
    inner join public.businesses b on b.v:_id = s1.v:_id
where 
    b.v:businessSetting = 'enabled'
)
    
select 'Businesses signedup' as step, count(*) as count from step1
union 
select 'Enabled' as step, count(*) as count from step2
order by count desc

有人可以帮忙吗？

【问题讨论】：

WITH step1 AS ( 在您的 SQL 开头丢失。
v:_id 和 v:created 是什么？
对不起，我应该指定的！我的数据库被复制到 Snowflake 数据库中，该数据库为每个对象创建 json 变量 v

标签： sql snowflake-cloud-data-platform

【解决方案1】：

您没有从第 1 步返回 v，而是返回“V:_ID”。所以应该是：

with step1 as (
select
    v:_id
from 
    PUBLIC.BUSINESSES 
where 
    v:created::date between DATEADD(dd, 1, last_day(DATEADD(mm, -3, GETDATE()))) and getdate()
group by 1
),
step2 as (
select
    distinct b.v:_id
from
    step1 s1
    inner join public.businesses b on b.v:_id = s1."V:_ID"
where 
    b.v:businessSetting = 'enabled'
)
    
select 'Businesses signedup' as step, count(*) as count from step1
union 
select 'Enabled' as step, count(*) as count from step2
order by count desc;

我建议为该列定义一个别名并使用它：

with step1 as (
select
    v:_id AS ID
from 
    PUBLIC.BUSINESSES 
where 
    v:created::date between DATEADD(dd, 1, last_day(DATEADD(mm, -3, GETDATE()))) and getdate()
group by 1
),

step2 as (
select
    distinct b.v:_id
from
    step1 s1
    inner join public.businesses b on b.v:_id = s1.id
where 
    b.v:businessSetting = 'enabled'
)
select 'Businesses signedup' as step, count(*) as count from step1
union 
select 'Enabled' as step, count(*) as count from step2
order by count desc;

【讨论】：

啊，是的，这是我犯的错误！非常感谢！