In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.
Code words in text are shown as follows: "In PostgreSQL 9.0, the utility
pg_Standby is no longer required, as many of its features are now performed directly by the server."
A block of code is set as follows:
CREATE USER repuser SUPERUSER LOGIN CONNECTION LIMIT 1 ENCRYPTED PASSWORD 'changeme';
When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:
SELECT * FROM mytable WHERE (col1, col2, … ,colN) IN (SELECT col1, col2, … ,colN FROM mytable GROUP BY col1, col2, … ,colN HAVING count(*) > 1); ...