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, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: " By using the pg_stat_statements view, we learn quite a bit about our PostgreSQL cluster."
A block of code is set as follows:
CREATE VIEW v_current_activity AS SELECT * FROM pg_stat_activity WHERE state != 'idle';
When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:
CREATE VIEW v_running_queries AS SELECT pid, now() ...