Syntax Issue With MySQL Trigger - mysql

Question

DELIMITER $$
CREATE TRIGGER update_cnitrand_cust_code AFTER INSERT ON `cnitrand`
FOR EACH ROW
BEGIN
DECLARE bill_no INT DEFAULT 0;
IF NEW.bill_no = 0 THEN
SET bill_no = (SELECT bill_no FROM cnitrand
WHERE (tx_no = NEW.tx_no AND
input_area = NEW.input_area AND
tx_line_no = NEW.tx_line_no AND
bill_no <> "") OR
(tx_no = NEW.tx_no AND
bill_no <> "")
LIMIT 1);
ELSE
SET bill_no = NEW.bill_no;
END IF;
INSERT INTO tblrptcnitrandmap
(tx_no, input_area, tx_line_no, bill_cust_code, bill_no)
VALUES
(NEW.tx_no, NEW.input_area, NEW.tx_line_no, NEW.bill_cust_code, bill_no);
END;$$
It returns an error
"#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '$$' at line 14"
Can you please tell me, what is wrong with code..

Answer 1

DELIMITER $$
CREATE TRIGGER update_cnitrand_cust_code AFTER INSERT ON `cnitrand`
FOR EACH ROW
BEGIN
DECLARE bill_no INT DEFAULT 0;
IF NEW.bill_no = 0 THEN
SET bill_no = (SELECT bill_no FROM cnitrand WHERE (tx_no = NEW.tx_no AND input_area = NEW.input_area AND tx_line_no = NEW.tx_line_no AND bill_no <> "") OR (tx_no = NEW.tx_no AND bill_no <> "") LIMIT 1);
ELSE
SET bill_no = NEW.bill_no;
END IF;
INSERT INTO tblrptcnitrandmap (tx_no, input_area, tx_line_no, bill_cust_code, bill_no) VALUES (NEW.tx_no, NEW.input_area, NEW.tx_line_no, NEW.bill_cust_code, bill_no);
END$$
DELIMITER ;