大查询错误 - 标量子查询产生多个结果

问题描述

select
  CASE LOWER(channel)
    WHEN 'sem' THEN 
      CASE
        WHEN (LOWER(SPLIT(campaign_name,'_')[SAFE_OFFSET(9)]) = 'us') THEN 'us independents'
        WHEN (LOWER(SPLIT(campaign_name,'_')[SAFE_OFFSET(9)]) = 'intl') THEN 'intl independents'
        WHEN (LOWER(SPLIT(campaign_name,'_')[SAFE_OFFSET(9)]) = 'part') THEN 'partners'
        WHEN (LOWER(SPLIT(campaign_name,'_')[SAFE_OFFSET(9)]) = 'invest') THEN 'domain investors & registrars'
        WHEN campaign_name IS NOT NULL  or channel IS NOT NULL THEN 
          (select  (business_unit)
           from dgapbigquery.bi_reports.channel_campaign_exception_lookup)
        ELSE 'unkNown'
      END
    END
from 
  gdgapbigquery.bi_reports.channel_campaign_exception_lookup

解决方法

试试

TabBarView(
        controller: tabcontroler,children: <Widget>[
          Container(color: Colors.red),Container(color: Colors.green),Container(color: Colors.blue),],),