[英]Can get some counts in one sql query?
美好的一天。
数据库:MySQL
表:
name (varchar 200)
status (enum 'open','close','pause')
为了获得所有状态的全name
我需要使用4查询:
SELECT count(*) FROM TABLE //count all names
SELECT count(*) FROM TABLE where status = open //count names where status = open
SELECT count(*) FROM TABLE where status = close //count names where status = close
SELECT count(*) FROM TABLE where status = pause //count names where status = pause
有谁知道如何在一个 sql查询中获得所有计数,真的吗?
SELECT count(*) as total_count,
sum(status = 'open') as status_open_count,
sum(status = 'close') as status_close_count,
sum(status = 'pause') as status_pause_count
FROM TABLE
使用以下查询:
SELECT status, count(name) as cnt FROM TABLE GROUP BY status;
你可以试试
Select Count(Status),Status,(Select Count(Status) as TotalCount From TABLE) From TABLE Group By Status;
另一种选择:
SELECT status, COUNT(*) as aCount,
FROM TABLE
GROUP BY status
UNION ALL
SELECT 'All', COUNT(*) as aCount,
FROM TABLE
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