Introducción a jQuery (Parte 7)
Octavo video de la serie. Eliminando elementos de la lista
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Introducción a jQuery (Parte 6)
Introducción a jQuery (Parte 8)
Firebird 2.1 UPDATE OR INSERT
Another great feature that I like in Firebird 2.1 is the UPDATE OR INSERT statement. It's a really time saver and it makes the SQL cleaner. For example suppose I have a products table like the one I use in my last post and an inventory table to store the product stock. Before Firebird 2.1 if I want to set the stock for a product I needed to check if a record for that product_id already exists; if the product_id already exists then I write an update. If not then I write an insert statement. So I ended up with something like this: IF EXISTS(SELECT * FROM inventory WHERE product_id = :product_id ) THEN UPDATE inventory SET stock = :stock WHERE product_id = :product_id; ELSE INSERT INTO inventory (product_id, stock) VALUES (:product_id, :stock); In this example I only update one field but when I have to update a big table I ended up with a big chunk of code and thinking: "there should be another (better) way to do this". Fortunately now with
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