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A CRON script is a list of one or more command to a computer operating
system or application server that are to be executable at a specified time.
Each command is executed when its triggering time arrives. In UNIX-based
operating system, the crontab command is a user interface command that
creates or changes a file (called a crontab file). This file contains a list
of UNIX shell commands, each with a specified time of execution. A CRON
script is similar.
trigger
A trigger (from the Dutch trekken, meaning to pull) is a lever which, when
pulled by the finger, releases the hammer on a firearm. In a database, a
trigger is a set of structured query language (SQL) statements that
automatically "fires off" an action when a specific operation (such as
changing data in a table) occurs. A trigger consists of an "event" (insert,
delete, or update command) and a related "action" (insert, delete, update,
or execute procedure command) which can be used to preserve data integrity
by checking on or changing data in a consistent manner.
If a trigger's logic requires more than 60 lines of code to carry out, it is
recommended that most of the code be put in a stored procedure, a
precompiled set of SQL statements that can be called from a trigger and
shared between programs.
Structured Query Language
SQL (Structured Query Language) is a standard interactive and programming
language for getting information from and updating a database. Although SQL
is both an American National Standards Institute and an International
Organization for Standardization standard, many database products support
SQL with proprietary extensions to the standard language. Queries take the
form of a command language that lets you select, insert, update, find out
the location of data, and so forth. There is also a programming interface.
Also, my favorite search engines are:
www.google.com
www.dogpile.com
Good luck!
~~~~~~~~~~~~~~~~~~~~~~~
Jenise Cook-Crabbe
Sr. Technical Writer
Pacific Life Insurance Co.
jenise -dot- cook-crabbe -at- pacificlife -dot- com
~~~~~~~~~~~~~~~~~~~~~
IPCC 01, the IEEE International Professional Communication Conference,
October 24-27, 2001 at historic La Fonda in Santa Fe, New Mexico, USA.
CALL FOR PAPERS OPEN UNTIL MARCH 15. http://ieeepcs.org/2001/
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