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Hello, I have issues while doing join. When I need to join 2 tables, this is all right. But when I have a third table included in the query, here come the issues! SELECT a.book, Sum(a.ACCRUAL+a.VALUE) AS TOTAL_DISC, Sum(b.ACCRUAL+b.VALUE) AS TOTAL_REF, TOTAL_DISC-TOTAL_REF AS PL FROM TABLE1 AS...

Hi I am a french engineer! Happy to join you