Exam (elaborations)
UTA INSY 3304 EXAM 2 – 2024/2025
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UTA INSY 3304 EXAM 2 – 2024/2025...
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Normalizations: (3) - ANSWER: Evaluating and correcting table architecturesto reduce data redundancy.
-1nf -2nf
-3nf
1NF (First Normal Form) - Answer Table Format. There are no recurring
groupings, and the primary key has been discovered.
2NF (Second Normal Form): ANSWER 1NF with no partial dependencies.
3NF (Third Normal Form): ANSWER 2NF with no transitive dependencies.
Dependencies (4) - ANSWER: Functional Dependency.
-Full functional dependency
-Partial dependency
-Transitive Dependency
Functional Dependency: ANSWER The attribute B is functionally reliant on the
characteristic A if each value of A affects exactly one value of B.
Full Functional Dependency - Answer If attribute B is functionally reliant on a
composite key A but not on any of its subsets, then it is fully functionally
dependent on A.
Partial Dependency - A functional dependence in which the determinant is only
part of the primary key.
Transitive Dependency - The ANSWER attribute depends on another attribute
that is not part of the main key.
, DDL (Data Definition Language): ANSWER Tables, views, functions, and
stored procedures are examples of database objects that may be created and
modified using SQL.
DML (Data Manipulation Language): ANSWER A portion of SQL that is used
to query, insert, update, and delete data from a database.
CREATE DATABASE – ANSWER The SQL command for creating a
database.
CREATE DATABASE database_name;
CREATE TABLE, ANSWER Adds a new table to the user's database schema.
CREATE TABLE tablename (AS)
ALTER TABLE, ANSWER Changes a table's definition (adds, updates, or
removes attributes or constraints)
ALTER TABLE Table_Name
ADD column_name, datatype;
OR ALTER COLUMN column_name datatype.
Alternatively, drop column_name.
DROP TABLE - ANSWER drops an existing table in a database.
DROP TABLE tablename.
INSERT -- ANSWER The INSERT INTO statement is used to create new
records in a table.
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