sql="select min(p.code)as prd_code_from,max(p.code) as prd_code_to from period p ,acctprd a where p.acct_prd=a.code and p.acct_prd =? order by p.code";
sql="select min(p.code)as prd_code_from,max(p.code) as prd_code_to from period p ,acctprd a where p.acct_prd=a.code and p.acct_prd =? order by p.code";