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Understand Relational Databases Read chapter Read first chapter

2019 | OriginalPaper | Chapter

8. Modify Data with Advanced DML

Author : Jon Heller

Published in: Pro Oracle SQL Development

Publisher: Apress

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Abstract

Now that we learned how to write advanced SQL statements to retrieve data, it is time to learn how to write advanced SQL statements to change data. Oracle Data Manipulation Language (DML) lets us insert, update, and delete data.

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previous chapter Query the Database with Advanced SELECT Features
next chapter Improve the Database with Advanced Oracle Schema Objects
Footnotes
1
Arguably a SELECT statement is also a DML statement, especially a SELECT FOR UPDATE that locks rows. SELECT doesn’t permanently change tables but it does manipulate data. In practice, developers treat SELECT different than other statements, so when this book says “DML,” it does not include a SELECT statement.
 
2
If you’re interested in seeing an example of the problems key-preserved try to avoid, look at my answer to this question: https://stackoverflow.com/questions/17092560/ .
 
3
We may be able to work around server access limitations with the open source program Oracle Copy (OCP): https://github.com/maxsatula/ocp .
 
4
The popular DATA_DUMP.SQL is useful for quickly outputting data to a CSV file. There are many versions of this utility, including one I have worked on: https://github.com/jonheller1/data_dump .
 
Metadata
Title
Modify Data with Advanced DML
Author
Jon Heller
Copyright Year
2019
Publisher
Apress
Book
Pro Oracle SQL Development

Print ISBN: 978-1-4842-4516-3

Electronic ISBN: 978-1-4842-4517-0

Copyright Year: 2019

DOI
https://doi.org/10.1007/978-1-4842-4517-0_8

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