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I'm getting this error which seems to be an issue with column spelling. However I am 99% percent sure I have spelled everything correct, but I can't see any reason to be getting the error I do... Here's the source: CREATE OR REPLACE TRIGGER update_qoh_trigger AFTER INSERT ON sales FOR EACH ROW DECLARE v_qoh products.qoh%TYPE; v_new_qoh products.qoh%TYPE; BEGIN SELECT qoh INTO v_qoh FROM products WHERE id = :new.product_id; v_new_qoh := v_qoh - new.quantity; // ERROR HERE UPDATE products SET qoh = :v_new_qoh WHERE id = :new.product_id; END; / sho err And that gives a: 12/12 PLS-00049: bad bind variable 'V_NEW_QOH' I have tried replacing line 12 with the following combinations: v_new_qoh := :v_qoh - :new.quantity; :v_new_qoh := :v_qoh - :new.quantity; :v_new_qoh = :v_qoh - :new.quantity; :v_new_qoh := v_qoh - :new.quantity; :v_new_qoh := :v_qoh - new.quantity; v_new_qoh := v_qoh - :new.quantity; But it still gives me the error. The products table looks like this: CREATE TABLE products ( id NUMBER, name VARCHAR2, price NUMBER, qoh NUMBER(2) ); CREATE TABLE sales ( id NUMBER(10) AUTO_INCREMENT, customer_id NUBMER(3), product_id NUMBER(3), quantity NUMBER(2), price NUMBER(5,2), sale_date DATE, despatch_id NUMBER(10) ); Thanks in advance for your help.

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