From HTYP, the free directory anyone can edit
CREATE PROCEDURE Upd_Depts_fr_Depts_Suppliers()
BEGIN
DELETE FROM _depts;
INSERT INTO _depts(`ID`,`ID_Supp`,`CatKey`,`CatNum`,`CatWeb_Dept`,`CatWeb_Title`)
SELECT
d.ID,
d.ID_Supplier AS ID_Supp,
UPPER(IFNULL(d.PageKey,d.CatKey)) AS CatKey,
UPPER(CONCAT_WS("-",s.CatKey,d.CatKey)) AS CatNum,
LOWER(CONCAT_WS("/",s.CatKey,IFNULL(d.PageKey,d.CatKey))) AS CatWeb_Dept,
LOWER(CONCAT_WS("/",s.CatKey,d.CatKey)) AS CatWeb_Title
FROM cat_depts AS d LEFT JOIN cat_supp AS s ON d.ID_Supplier=s.ID;
END