获得正确的计数 SQL

Question

我有一个查询，我只需要 return 结果，其中事件在同一日期同一 model/serial 号码发生不止一次 - 在此查询中，只要特定 function 和 eventdetails 参数在一天内出现不止一次。这是查询 -

SELECT DISTINCT store, tintermodel, tinterserial, eventdetails, trunc(datetime)
FROM tinter_events
WHERE tintermodel = 'FM 8000DE'  
AND (datetime >= to_timestamp('2017-05-01', 'YYYY-MM-DD') 
AND datetime < to_timestamp('2017-08-31', 'YYYY-MM-DD'))
AND function = 'Set Colorant Level'
AND eventdetails = 'B1[550]'
GROUP BY store, tintermodel, tinterserial, eventdetails, trunc(datetime)
ORDER BY store, SUBSTR(eventdetails,1,2), trunc(datetime);

会不会像在 GROUP BY 短语的末尾添加一个 HAVING COUNT(*) > 1 一样简单？

Answer 1

通过查看每个模型每个日期的计数来检查它，从那里你会知道哪些记录应该只显示在你的查询中

SELECT trunc(datetime),
       tintermodel,
       COUNT(*)
  FROM tinter_events
 WHERE tintermodel = 'FM 8000DE'
   AND function = 'Set Colorant Level'
   AND eventdetails = 'B1[550]
 GROUP BY trunc(datetime),
          tintermodel
 ORDER BY trunc(datetime)

获得正确的计数 SQL

Getting correct count SQL

sql

count

having