T-SQL 視圖
阿新 • • 發佈:2018-12-01
ssi exist from sharp core ntc res where --
1 use StudentManager 2 go 3 --判斷視圖是否存在 4 if exists(select * from sysobjects where name=‘view_ScoreQuery‘) 5 drop view view_ScoreQuery 6 go 7 --創建視圖 8 create view view_ScoreQuery 9 as 10 select top 1000 Students.StudentId,StudentName,ClassName, 11 C#=CSharp,SQLDB=SQLServerDB, 12ScoreSum=(CSharp+SQLServerDB) from Students 13 inner join ScoreList on Students.StudentId=ScoreList.StudentId 14 inner join StudentClass on Students.ClassId=StudentClass.ClassId 15 order by StudentClass.ClassId 16 go 17 --使用視圖查詢 18 select * from view_ScoreQuery
視圖裏面如果想用order by 排序,必須要加入top,所以視圖裏不建議加order by ,想要加order by 建議在調用視圖的時候加
T-SQL 視圖