DBMS 6

CREATE TABLE N_RollCall (
column1 INT,
column2 VARCHAR(50),
-- Add more columns as needed
);
CREATE TABLE O_RollCall (
column1 INT,
column2 VARCHAR(50),
-- Add more columns as needed
);
DELIMITER //
CREATE PROCEDURE MergeRollCallData()
BEGIN
DECLARE done INT DEFAULT FALSE;
DECLARE v_column1 INT; -- Declare variables for each column
DECLARE v_column2 VARCHAR(50); -- Adjust the data type and length
-- Declare cursor for selecting data from N_RollCall
DECLARE new_roll_call_cur CURSOR FOR
SELECT column1, column2 FROM N_RollCall; -- Adjust column names
-- Declare handlers for exceptions
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
OPEN new_roll_call_cur;
read_loop: LOOP
FETCH new_roll_call_cur INTO v_column1, v_column2;
-- Assign variables for each column
IF done THEN
LEAVE read_loop;
END IF;
-- Check if record already exists in O_RollCall
IF NOT EXISTS (
SELECT * FROM O_RollCall
WHERE column1 = v_column1 AND column2 = v_column2
-- Replace with actual column names
) THEN
-- If record doesn't exist, insert into O_RollCall
INSERT INTO O_RollCall VALUES (v_column1, v_column2);
-- Replace with actual column names
END IF;
END LOOP;
CLOSE new_roll_call_cur;
SELECT 'Data merge complete.';
END//
DELIMITER ;