14 Questions
What does DDL stand for in the context of database languages?
Data Definition Language
Which SQL element deals with managing and manipulating data in the database?
DML
What does a database schema refer to?
Logical and visual configuration of the entire relational database
Which command is used in DDL to modify the database structures?
ALTER
What is the primary purpose of DCL in database languages?
Granting or revoking access to data in the database
Which SQL command is used to create new database objects such as tables or indexes?
CREATE
What is the purpose of database normalization?
To avoid complexity and eliminate duplicates
Which SQL command is used to control data manipulation access for maintaining data consistency and accuracy?
LOCK
What does DML stand for in SQL?
Data Manipulation Language
Which type of normalization entails organizing a database into several tables to reduce redundancy?
3NF
What is the main purpose of DCL in SQL?
To grant and revoke access rights and permissions
Which SQL command is used to describe in detail how to obtain access to the data?
EXPLAIN PLAN
What is the primary key used for in database normalization?
It uniquely identifies the rows of data in a table
What does DDL stand for in the context of database languages?
Data Definition Language
Study Notes
Database Language Fundamentals
- DDL stands for Data Definition Language, which is used to define and manipulate the structure of a database.
Data Management
- DML stands for Data Manipulation Language, which deals with managing and manipulating data in the database.
Database Schema
- A database schema refers to the overall organization and structure of a database, including the relationships between different data entities.
Modifying Database Structures
- The ALTER command is used in DDL to modify the database structures.
Database Security
- The primary purpose of DCL (Data Control Language) is to control access to the database, ensuring data consistency and accuracy.
- The GRANT command is used to control data manipulation access for maintaining data consistency and accuracy.
Database Normalization
- The primary purpose of database normalization is to reduce redundancy and improve data integrity.
- One type of normalization is normalization, which entails organizing a database into several tables to reduce redundancy.
- The primary key is used in database normalization to uniquely identify each record in a table.
Creating Database Objects
- The CREATE command is used to create new database objects such as tables or indexes.
Access Control
- The PRIMARY KEY is used to describe in detail how to obtain access to the data.
- The main purpose of DCL in SQL is to control access to the database and ensure data consistency and accuracy.
Test your knowledge of database languages and schema with this quiz. Learn about data definition language (DDL), data manipulation language (DML), data control language (DCL), and database schema.
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