文件名称:聚合函数--SqlServer教材,基础学习(基础篇)
文件大小:4.56MB
文件格式:PPT
更新时间:2024-05-15 15:55:30
SqlServer
聚合函数-1 SUM AVG × SELECT SUM(ytd_sales) FROM titles WHERE type = 'business' SELECT SUM(ytd_sales) ,Price FROM titles WHERE type = 'business' SELECT AVG(SCore) AS 平均成绩 From Score WHERE Score >=60