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如何查看执行计划 SQL Server 堆表与栈表的对比(大表) SQL Server中CURD语句的锁流程分析 树表分级统计 - Amwpfiqvy 在SQL Server中使用正则表达式 查看SQL Server性能时常用的性能计数器 SQL Server中行列转换 Pivot UnPivot Apq本地工具集 Apq.aspx - Amwpfiqvy 第一个:_Config.js JScript.Encode.js - Amwpfiqvy Apq.Threading.js - Amwpfiqvy - 博客园 Script/_Config.js Apq.Text.js Apq.js - Amwpfiqvy - 博客园 prototype.js Apq.aspx - Amwpfiqvy - 博客园 查看数据库所有用户表及其列信息 利用JScript的Literal Syntax特性用字符串表示对象
SQL:查询购买了所有指定商品的人 - Amwpfiqvy
Amwpfiqvy · 2012-03-05 · via 博客园 - Amwpfiqvy
表结构:用户购买过的商品记录表product_buy主要列:user_name product_idA 1B 1C 2A 3A 2查询同时购买了product_id为 1,2,3的SQL语句:SELECT user_name FROM product_buy WHERE product_id in(1,2,3) GROUP BY user_name HAVING COUNT(DISTINCT product_id) = 3;要点:COUNT(DISTINCT ...)