Question

How can I convert the following T-SQL Statement to PL/SQL

set @disbursement_no = (select isnull(max(convert(numeric, right(DV_NO, 6))), 0) + 1
            from CD_T_DV_HDR where year(DATE_DV) = year(getdate()))

The data type of DV_NO is varchar and Date_Dv is date.

I’m really new to PL/SQL, and I’m having a hard time to convert my SQL statement to PL/SQL. I Hope you can help me.

Answer 1

It’ll be like this:

DECLARE
    disbursement_no NUMBER;
BEGIN
    SELECT ( coalesce(MAX(To_number(Substr(dv_no, -6, 6))), 0) ) + 1
    INTO   disbursement_no
    FROM   cd_t_dv_hdr
    WHERE  To_char(date_dv, 'rrrr') = To_char(SYSDATE, 'rrrr');
END; 

Substr(dv_no, -6, 6) fetches the rightmost 6 characters. to_number converts the string to number. max fetches maximum number & coalesce checks if the resultant number is null & converts it to zero.