So far, you've been
using very simple SQL statements to fetch the desired information from your
DBMS. Once you become a guru, you start writing lengthy and complex statements
to fulfill the needs of your application and ultimately your end user.
Experienced coders usually add descriptive text to these complex statements for
future reference. Such a text is known as comment, and is embedded before or
within a SQL statement using two hyphens (--) or is entered within /* and */
character sets.
The first output below
displays the use of embedded inline comments entered after two hyphens. The second one, which is used to create
multi-line comments to comment out code, is enclosed within /* and */
characters.
Output :
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