ER/Studio - Embarcadero Technologies Product Documentation

GLOSSARY
Synonym: An alternate name for a database object.
T
Table: The basic unit of data storage in a database. Tables correspond to entities in the logical model.
Tablespace: A specialized storage structure used to hold one or more tables.
Text Block: Useful information about a diagram.
Title Block: General information about a diagram in a text field.
Toolbars: ER/Studio toolbars are context-sensitive and change to reflect the element of the application you are
using. Toolbar buttons offer quick access to common features of ER/Studio. All functionality accessible from toolbar
buttons are also accessible from Menus and Shortcut Menus. Toolbars change depending on if you are working with
logical or physical models. You can move toolbars to anywhere on the ER/Studio workspace. You can dock toolbars to
the perimeters of the workspace and specify which toolbars you want displayed on the workspace.
Trigger: A special type of stored procedure that automatically executes when data modification operations such as
INSERT, UPDATE, and DELETE occur.
U
Unification: Unification is the act of combining columns with the same name to create one single column. It normally
occurs when you propagate a foreign key into a table that has an existing column of the same name.
Unique Index: A database access object that ensures that every row in a table can be uniquely identified.
Unique Key: A unique key is a key that is constrained so that no two of its values are equal. The columns of a
unique key cannot contain null values. The constraint is enforced by the database manager during the execution of
any operation that changes data values, such as INSERT or UPDATE. The mechanism used to enforce the constraint
is called a unique index. Thus, every unique key is a key of a unique index.
User-Defined Datatype: A customized and reusable datatype built from basic datatypes.
V
Verb Phrase: A description of a relationship that conveys the business rule implied by the relationship. A verb
phrase is read as the verb in a sentence with the parent and child entities serving as the objects and subjects.
View: A relational object used for constructing virtual views of data without regard for where the data resides.
View Relationship: A special type of relationship used to propagate attributes from an entity or a view to a view.
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