Re: How to join master/detail to retrieve lastest detail?

[Ramalingam Chelliah]

Hi,
The idea is to concat the value whose max is considered with other fields and finding Max of the caoncatenated value and extracting the field value...
Try Like this ...

SELECT X.StationId, X.StationName,MAX(StatusDate) ,
SUBSTR( MAX(CONCAT(StatusDate,Metric1)),CHAR_LENGTH(StatusDate)+1) AS Metric1 ,

SUBSTR( MAX(CONCAT(StatusDate,Metric3)),CHAR_LENGTH(StatusDate)+1) AS Metric2 ,

SUBSTR(
MAX(CONCAT(StatusDate,Metric3)),CHAR_LENGTH(StatusDate)+1) AS Metric3 ,

FROM station as X,stationstatus
WHERE X.StationId=stationstatus.StationId
GROUP BY stationstatus.StationId ;


Hope this helps.....

Regards,
Ram.









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