update detail table from a table in PL sql oracle -


there table loan ( loan of diff type)

code  loan type   amount   deduction  balance 111    loan1      2000       0        2000 111    loan2      5000       0        5000

there table deduction

code   ded_amont date 111    4000       xyz

i finding solution in oracle (pl/sql) update loan table 1 one on reducing balace.


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