October 2002
Beginner
864 pages
18h 41m
English
Content preview from Sams Teach Yourself SQL in 21 Days, Fourth Edition
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Q&A
| Q1: | How can a view contain data but require no physical storage? |
| A1: | Actually, a view does not contain data at all. A view is a virtual table or a predefined query. The only space required for a view is for the view definition. Remember that a view is defined by a SELECT statement. |
| Q2: | What happens to a view if a table on which a view is dependent is dropped? |
| A2: | The view will become invalid since the underlying data that defines the view no longer exists. |
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.