SELECT (COUNT(CASE WHEN split ='1000' THEN answer_time ELSE NULL END)/NULLIF(COUNT(CASE WHEN split ='100' THEN answer_time ELSE NULL END),0)) * 100.0
,COUNT(queued_time) AS CO
FROM log
WHERE (queued_time >= DATEADD(mm, DATEDIFF(mm, 0, GETDATE()) - 6, 0))
AND (queued_time < DATEADD(mm, DATEDIFF(mm, 0, GETDATE()), 0))
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SQL Server MVP
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