The ________ can be described as a detailed system data dictionary that describes all
objects within the database, including data about table names, the table's creator and
creation date, the number of columns in each table, the data type corresponding to each
column, index filenames, index crea...
INSY 3304 CH 3
The ________ can be described as a detailed system data dictionary that describes all
objects within the database, including data about table names, the table's creator and
creation date, the number of columns in each table, the data type corresponding to each
column, index filenames, index creators, authorized users, and access privileges. -
✔️✔️system catalog
________ are especially useful when you are trying to determine what values in related
tables cause referential integrity problems. - ✔️✔️outer joins
If a foreign key contains either matching values or nulls, the tables that make use of
such a foreign key are said to exhibit ________ integrity. - ✔️✔️Referential
The use of a(n) ________ relationship ensures that two entity sets are not placed in the
same table when they should not be. - ✔️✔️1 : 1
A relational operator that yields all rows in one table that are not found in the other table
is the ________ operator. - ✔️✔️difference
No invoice can have a duplicate number, nor can it be null. This is an example of
________. - ✔️✔️entity integrity
A(n) ________ links tables by selecting only the rows with common values in their
common attribute. - ✔️✔️natural join
The one-to-many (1:M) relationship is easily implemented in the relational model by
putting the primary key of the "1" side in the table of the "many" side as a ________
key. - ✔️✔️foreign
________ data is also known as string data. - ✔️✔️Character
A(n) ________ links tables on the basis of an equality condition that compares specified
columns of each table. - ✔️✔️equijoin
Within a table, the primary key must be unique so that it will identify each row. When
this is the case, the table is said to exhibit ________ integrity. - ✔️✔️entity
A ________ key's effectiveness in narrowing down a search depends on how restrictive
it is. - ✔️✔️secondary
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