MySQL function to compare values in a db table against the previous
- by Stuart
Iam quite new to functions in SQL and I would like to create a function to compare values in a MySQL table against previous and I am not sure how to do this.
For example (iId is the input value)
DECLARE pVal INT(20);
DECLARE val INT(20);
SELECT price INTO pVal FROM products WHERE Id=iId;
SELECT price FROM products;
IF price == pVal THEN
SET val = price;
END IF;
Thanks
