SQL & PL/SQL

I have just pull out the script of a Function and want to run it on toad SQL editor.

I am little bit confused how to define the VARIABLEs here in toad SQL editor to run my script.

SELECT
NVL(SUM(debit), 0) - NVL(SUM(credit), 0)
INTO l_accountBalance
FROM
GLP_VoucherMaster vm
INNER JOIN GLP_VoucherDetail vd ON vm.GLP_VoucherMaster_ID = vd.GLP_VoucherMaster_ID
INNER JOIN GLP_ChartOFAccounts coa ON vd.GLP_ChartOfAccounts_ID = coa.GLP_ChartOfAccounts_ID
WHERE
vm.isActive = 'Y' AND vd.isActive = 'Y'

-- *** how to define variables in toad sql script editor ***

AND vm.voucherDate < p_cDate
AND coa.AccountCode LIKE p_accountCode || '%';

Thanks
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