How to best migrate this nested join ?

SELECT
     TBL1.ID AS ID1,
     TBL4.ID AS ID2,
     TBL5.ID AS ID3,
     TBL6.ID AS ID4FROM    TBL1, TBL2, TBL3, TBL4, TBL5, TBL6, TBL7

WHERE       TBL1.AA *= TBL2.AA    and TBL1.AA = TBL3.AA   and TBL4.AB = TBL3.CD   and AB = 'TBL4'  /* not sure where AB is coming from */   and TBL4.AB = TBL7.AB   and TBL7.ZZ = 0   and TBL4.AB *= TBL6.AB   and TBL4.AB *= TBL5.AB
;