I need to update a table called ' preformat' which has many columns. I need to update only 2 columns, which are iso_ccy_cod and acct_ccy_deci_plac on the basis of the value of a column in another table (currency) , iso_ccy_cod.

If the value in currency.iso_ccy_cod is 'ADP' and it exists in the table Preformat.iso_ccy_cod, I need to put the value of currency.ccy_deci_plac into preformat.ccy_deci_plac.

Also, I need to put the value in the column preformat.acct_ccy_deci_plac if the value in currency.iso_ccy_cod exists in preformat.acct_ccy_cod.

Please help me ASAP.