ms sql count distinct multiple columns的相關文章
ms sql count distinct multiple columns的相關公司資訊
ms sql count distinct multiple columns的相關商品

sql - SELECT COUNT(DISTINCT... ) error on multiple columns ...
瀏覽:567
日期:2025-04-27
Try combining them into a single field: SELECT COUNT(DISTINCT make + ' ' +
model) FROM VehicleModelYear ......看更多