Software Applications Programming Errors and solutions.

1.Create  or replace trigger before insert on field in sql Create or replace trigger t1 Before insert on Employee For each row declare v_firstname Employee.firstname%type; v_lastname Employee.lastname%type; Begin DBMS_OUTPUT.PUT_LINE('You inserted the first Name:'|| :NEW.FIRSTNAME); DBMS_OUTPUT.PUT_LINE('You inserted the first Name:'|| :NEW.LASTNAME); Begin select distinct firstname into v_firstname from Employee where firstname=:NEW.FIRSTNAME; IF(:NEW.FIRSTNAME = v_firstname) THEN DBMS_OUTPUT.PUT_LINE('This first name exists already in the table Employee.'); end if; exception when no_data_found then DBMS_OUTPUT.PUT_LINE('This first name does not exist in the table Employee.'); End; Begin select distinct lastname into v_lastname from Employee where lastname=:NEW.lastNAME; IF(:NEW.LASTNAME = v_lastname) THEN DBMS_OUTPUT.PUT_LINE('This last name exists already in the table Employee.

This is stored procedure which show you rows return as per mention in stored procedure. CREATE PROCEDURE get_categories( IN p_action_flag VARCHAR(50), IN p_firstrow int, IN p_lastrow int) BEGIN IF p_action_flag = 'all' THEN SELECT top 50 u.*, d.name, d.image FROM user u, member gu, detail d WHERE u.user_id = gu.user_id AND u.user_id = d.user_id AND u.status = '1' AND gu.group_id IN (1, 7) GROUP BY u.user_id ORDER BY d.name LIMIT p_firstrow,p_lastrow; ELSEIF p_action_flag = 'Most Viewed' THEN SELECT top 50 u.*, d.name, d.image FROM user u, member gu, detail d WHERE u.user_id = gu.user_id AND u.user_id = d.user_id AND u.status = '1' AND gu.group_id IN (1, 7) GROUP BY u.user_id ORDER BY u.views DESC, d.name ASC LIMIT p_firstrow,p_lastrow ; END IF END

To skip a record in a cursor and continue with the next record you can try below code in oracle or sql. declare cursor cur1 is select * from emp; rec cur1%rowtype; begin open cur1; loop fetch cur1 into rec; dbms_output.put_line(rec.ename||' '||rec.sal); fetch cur1 into rec; exit when cur1%notfound; end loop; close cur1; end;