Cours SGBD LAI2 - Institut supérieur d'informatique de Mahdia

Les fonctions de groupes (2)
SELECT product_id, product_name, product_description
FROM T_Product ;
Product_ID Product_Name Product_Description
----------- --------------------- -------------------
1 End Table
2 Coffee Table
3 Computer Desk Computer Desk 48
4 Entertainment Center
5 Writer's Desk
6 8-Drawer Desk
7 Dining Table
8 Computer Desk Computer Desk 64
SELECT COUNT(*)
FROM T_Product ;
COUNT(*)
--------
8
SELECT COUNT(product_description)
FROM T_Product ;
COUNT(product_description)
--------------------------
2
Riadh HADJ M’TIR – 2011/2012 128