Insert Lesson

Pre-Requisites

This lesson expects that you read first the sections

• Overview
• Data Model
• Update

The hands-on activity is expected to be done in this Lesson. Therefore, as you read the sections above, simply focus on understanding the concepts.

Insert Movie

Inserting new data into the tree structue of the database is done by simply using the set command.

First, we invoke the GT.M command shell interpreter by typing

gtm

This will open the interpreter and respond with the prompt

GTM>

In this prompt we can write the following command

set ^movies("The Matrix")=""

and then, proceed to populate its information.

For example

set ^movies("The Matrix")=""
set ^movies("The Matrix","actors","Carrie-Anne Moss")=""
set ^movies("The Matrix","actors","Keanu Reeves")=""
set ^movies("The Matrix","actors","Laurence Fishburne")=""
set ^movies("The Matrix","directors","Andy Wachowski")=""
set ^movies("The Matrix","directors","Lana Wachowski")=""
set ^movies("The Matrix","year",1999)=""

Insert Actor

A similar exercise can be made for data related to Actors, by creating an ^actors tree and populating it with data such as:

set ^actors("Keanu Reeves")=""
set ^actors("Keanu Reeves","birth","date","1964-09-02")=""
set ^actors("Keanu Reeves","birth","place","city","Beirut")=""
set ^actors("Keanu Reeves","birth","place","country","Lebanon")=""
set ^actors("Keanu Reeves","nationality","Canadian")=""

Exercise

• Insert one of your favorite movies into the ^movies tree.

• First check if the movie has not been created yet by others. Use the zwrite command to do so.
• Then use the set command to add your favorie movie along with its properties

• actors
• year
• directors

• Insert your favorite actor in the ^actors tree.

• First check if the name is already there, with the zwrite command.
• Then use the set command to add the record in the tree.