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parent table should check child record

KritikaSep 20 2011 — edited Sep 29 2011
hi all,

I have two tables
Gate_mast
(gate_no varchar2(10),
gate_date date)

Gate_ref
(gate_no varchar2(10),
Item varchar2(14),
qty number(14,3))

I want to put a check on Gate_mast. If there is any entry saved in Gate_mast, its atleast one entry must be saved in gate ref.

How can I achive this ?

Kindly Help...............
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Locked on Oct 27 2011
Added on Sep 20 2011
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