Table extension functionality allows sharing fields with a parent table. Administrators and developers extend tables during table creation.

Typically, tables are extended to create a set of records that share information with each other.

In the use case listed below, the Task table has multiple extensions:

A table extending another table is called a child table, and a table extended by it is called a parent table. A table can be both a parent and a child at the same time.

Table extending causes the following:

• Cross-table linking between the new table and the extending one
• System fields are created in the new table (like the sys_id field).

Necessary Tools

Instance administrators can use the All Tables tool to understand the relationships between the tables. To perform this, please complete the steps below:

1. Navigate to System Definition → All Tables.
2. Select the table you want by typing its title in the search bar.
3. Navigate to this table.
4. The value in the Parent field is the title of the parent table, the one the current table is sharing fields with.