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: "We can include other contexts through the use of the
A block of code is set as follows:
SELECT count(*) FROM employees WHERE (EXTRACT(YEAR FROM (SYSDATE)) - EXTRACT(YEAR FROM (hire_date))) >= 15;
When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:
INSERT INTO salespersons VALUES ('violet', 'Violet Robinson'); INSERT INTO salespersons VALUES ('maya', 'Maya Silver'); INSERT INTO regions VALUES ('NA', 'North America'); INSERT ...