如何使用group by使用多列的多个表

Question

以下是我的Oracle sql查询

Select   ELP_DEALER.DEALER,
         ELP_DEALER_RECON_WRK.Entire_Record
From     ELP_DEALER,
         ELP_DEALER_RECON_WRK
Where    ELP_DEALER_RECON_WRK.Dealer_Id = ELP_DEALER.DEALER_ID
         And ELP_DEALER.Dealer In ( 'CABC', 'IKBC', 'CITI', 'GNHW', '0062' )
Group By ELP_DEALER.Dealer

这里我只想要ENTIRE_RECORD字段基于DEALER的单条记录，如CABC，IKBC。请允许任何人帮助我

样本表

这是正常的输出

DEALER   ENTIRE_RECORD
0068      xyz

0068      abc

cabc      pqr

cabc      npq

过期输出应为

DEALER ENTIRE_RECORD
0068   anyoftheonerecord
cabc   anyoftheonerecord

Answer 1

Select   ELP_DEALER.DEALER,
         MAX(ELP_DEALER_RECON_WRK.Entire_Record) ENTIRE_RECORD
From     ELP_DEALER,
         ELP_DEALER_RECON_WRK
Where    ELP_DEALER_RECON_WRK.Dealer_Id = ELP_DEALER.DEALER_ID
         And ELP_DEALER.Dealer In ( 'CABC', 'IKBC', 'CITI', 'GNHW', '0062' )
Group By ELP_DEALER.Dealer