S
SELECT SR.stdRClass , SD.stdDname , SD.stdDMarks , SA.dist, SA.Aera
FROM studentregistration SR
INNER JOIN studentDetails SD ON SR.stdRid = SD.stdDid
INNER JOIN studentAdress SA ON SD.stdDid = SA.stdAid
where SR.stdRid='1' and SD.stdRid='1' and SR.stdRid='1'
group by SR.stdRClass ,SD.stdDname ,SD.stdDMarks ,SA.dist, SA.Aera;