March 2001
Intermediate to advanced
640 pages
14h 9m
English
book
Sams Teach Yourself Transact-SQL in 21 Days, Second Edition
by Lowell Mauer, David Solomon, Bennett McEwan
Content preview from Sams Teach Yourself Transact-SQL in 21 Days, Second Edition
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Q&A
| Q1: | Can I copy data from a table into itself using the INSERT command? In addition, I want to change the value of one column. |
| A1: | By using the INSERT statement with a SELECT statement, you can copy all the rows from the table into itself. However, you must modify the column in question as a separate step. You cannot update columns while performing this type of INSERT. The following code shows how to perform these tasks:
Insert customer_demo Select * from customer_demo Update customer_demo Set Addr2 = 'unavailable' |
| Q2: | You said that caution should be taken when using the INSERT, UPDATE, DELETE statements, but there seem to be some simple fixes to correct whatever I did wrong. Is this correct? |
| A2: | Yes. For example, a simple way to fix a misspelled ... |
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.