January 2019
Beginner
556 pages
14h 19m
English
Content preview from Learning PostgreSQL 11 - Third Edition
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Documentation
Documentation is essential for developers, as well as business owners, to understand the full picture. Documentation for the database schema, objects, and code should be maintained. ER and class diagrams are very useful in understanding the full picture. There are tons of programs that support UML and ER diagrams. You can generate ER and UML diagrams by using graph-editing tools, such as yEd, or an online tool, such as draw.io. Also, there are many commercial UML modeling tools that support reverse-engineering code.
Code documentation provides an insight into complex SQL statements. PostgreSQL uses -- and /**/ for single-line and multiline comments, respectively. The single-line comment, --, works on the rest of the line after ...
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