Question

我要排除计数以删除以下查询中的重复内容

SELECT *, count(1) as count except (count)
  FROM PRD.sites  
  group by site,id ,site_desc,timestamp
  having count(1) < 2

，但在[1:29]出现了意外的关键字EXCEPT错误。我正在使用standardSQL

Answer 1

您可以在下面尝试

select * except(count)
from
(
  SELECT *, count(1) as count 
  FROM PRD.sites  
  group by site,id ,site_desc,timestamp
  having count(1) < 2
)X

或者您可以使用row_number（）查找重复项

SELECT * except(rn)
FROM (
  SELECT
      *,
      ROW_NUMBER()
          OVER (PARTITION BY site,id ,site_desc,timestamp) as rn
  FROM FROM PRD.sites
)
WHERE rn= 1

Answer 2

您甚至不需要将COUNT（）包含在SELECT列表中-下面将非常有用，并且将根据列出的字段删除重复的行

#standardSQL
SELECT AS VALUE ANY_VALUE(t)
FROM PRD.sites t 
group by site,id ,site_desc,timestamp
having count(1) < 2

上方将仅显示没有重复的行（基于分组依据中的字段）

如果您需要根据字段删除重复项，请在下面使用

#standardSQL
SELECT AS VALUE ANY_VALUE(t)
FROM PRD.sites t 
group by site,id ,site_desc,timestamp

如果您需要基于整个行进行重复数据删除-您可以在下面使用

SELECT DISTINCT *
FROM PRD.sites

Answer 3

您可以尝试使用临时表

/* Get the data into a temp table */
SELECT * INTO #TempTable
FROM YourTable
/* Drop the columns that are not needed */
ALTER TABLE #TempTable
DROP COLUMN ColumnToDrop
/* Get results and drop temp table */
SELECT * FROM #TempTable
DROP TABLE #TempTable

选择除bigquery中的一列外的所有列

3 个答案: