MySQL VÆLG MIN for alle tider, men returner kun hvis MELLEM datoer

Hvis vi laver et minimum af alle transaktioner pr. kunde, så tjek om det er i den rigtige periode, vi får noget i retning af...

Dette vil blot give dig et ja/nej-flag om, hvorvidt kundens første køb var inden for perioden...

SELECT CASE COUNT(*) WHEN 0 THEN 'Yes' ELSE 'No' END As [WasFirstTransInThisPeriod?]
FROM (  
        SELECT bb_member.member_id As [member_id], MIN(bb_transactions.trans_tran_date) AS temp_first_time 
        FROM bb_business      
        RIGHT JOIN bb_transactions ON bb_transactions.trans_store_id = bb_business.store_id 
        LEFT JOIN bb_member ON bb_member.member_id = bb_transactions.trans_member_id 
        WHERE bb_business.id = '5651' 
        GROUP BY bb_member.member_id
    ) T
WHERE T.temp_first_time BETWEEN '2010-08-01' AND '2010-09-13'
ORDER BY T.member_id DESC

(dette er i T-SQL, men skulle forhåbentlig give en idé om, hvordan dette kan opnås tilsvarende i mySQL)

Simon