WHERE-tilstandsproblem i SQL

Jeg tror, ​​du prøver at få adgang til validFrom og validTo fra sagsforespørgslen i where-tilstand. Hvis det er tilfældet, skal du omformatere din forespørgsel.

SELECT t1.* FROM ( SELECT mPrice, aPrice, 
CASE 
    WHEN validFrom < '2013-11-01' 
        THEN '2013-11-01' 
    ELSE validFrom END AS validFrom, 

CASE 
    WHEN validTo > '2013-11-30' 
        THEN '2013-11-30' 
    ELSE validTo END AS validTo 

FROM commission) t1 

WHERE ((t1.validfrom BETWEEN '2013-11-01' AND '2013-11-30') OR (t1.validto BETWEEN '2013-11-01' AND '2013-11-30')) ORDER BY t1.validFrom

Men dette vil give 3 resultater. Hvis du har brug for at få det forventede resultat, så skal du bruge en AND betingelse i stedet for OR .

Så bliver din forespørgsel

SELECT t1.* FROM ( SELECT mPrice, aPrice, 
CASE 
    WHEN validFrom < '2013-11-01' 
        THEN '2013-11-01' 
    ELSE validFrom END AS validFrom, 

CASE 
    WHEN validTo > '2013-11-30' 
        THEN '2013-11-30' 
    ELSE validTo END AS validTo 

FROM commission) t1 

WHERE ((t1.validfrom BETWEEN '2013-11-01' AND '2013-11-30') AND (t1.validto BETWEEN '2013-11-01' AND '2013-11-30')) ORDER BY t1.validFrom