問題描述
我必須從 MS SQL Server 數(shù)據(jù)庫中的多個(gè)表創(chuàng)建視圖，但我無法獲得相同的正確語法.
I have to create a view from more than one table in an MS SQL Server database, but I am not able to get the correct syntax for the same.
推薦答案
您必須提供有關(guān)如何從多個(gè)表中返回?cái)?shù)據(jù)的更多信息.通常您使用 JOIN:
You'll have to provide more information about how you are looking to return data from more than one table. Typically you use JOINs:
CREATE VIEW your_view_vw AS
SELECT *
FROM TABLE_A a
JOIN TABLE_B b ON b.pk = a.fk
...其中 fk 代表外鍵"，而 pk 代表主鍵"——假設(shè)這些約束已經(jīng)到位.也許您需要改用交叉連接?這是一個(gè) JOIN 的出色視覺表示.
...where fk stands for "Foreign Key", and pk stands for "Primary Key" - assuming these constraints are in place. Maybe you need to use a Cross join instead? Here's a great visual representation of JOINs visually.
參考:
- 創(chuàng)建視圖
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