August 2016
Intermediate to advanced
512 pages
21h 2m
English
book
Real World SQL and PL/SQL: Advice from the Experts
by Arup Nanda, Brendan Tierney, Heli Helskyaho, Martin Widlake, Alex Nuitjen
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CHAPTER 8
Dynamic SQL
If you need to write a SQL statement but do not know all the elements of it, you might need dynamic SQL. With dynamic SQL, the actual SQL clause is built during the execution. For instance, dynamic SQL can be used when you do not know the columns in the SELECT part of the query or the table names in the FROM part of the query, or if the WHERE part of the query is unknown before run time. Dynamic SQL should be used only if you are not able to do what’s needed using static SQL. Dynamic SQL can only be used in PL/SQL.
SQL injection is seen as a big security risk while using dynamic SQL. If you are not already familiar with SQL ...
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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.
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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.