作者:mobiledu2502886633 | 来源:互联网 | 2018-07-10 19:29
1.使用GROUPBY子句创建分组示例:SELECTvend_id,COUNT(*)ASnum_prodsFROMProductsGROUPBYvend_id;
1. 使用GROUP BY子句创建分组 示例: SELECT vend_id, COUNT ( * ) AS num_prods FROM Products GROUP BY vend_id;
1. 使用GROUP BY子句创建分组
示例:
SELECT vend_id, COUNT(*) AS num_prods
FROM Products
GROUP BY vend_id;
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