Alright, thanks guys. This is what I was looking for
CREATE OR REPLACE FORCE VIEW "V_WB_15_PRD_LV" ("PRD_ID", "P_ID", "PRD_DSC") AS
SELECT UPPER(SUBSTR(mdl_dsc,1,3)) AS prd_id, NULL p_id, mdl_dsc AS prd_dsc
FROM (SELECT DISTINCT(mdl_dsc) AS mdl_dsc
FROM t_wb_15_prd)
UNION ALL...