Demo CompTIA FC0-U61 Exam Questions

A SELECT command is a SQL (Structured Query Language) statement that is used to return results for

a time range within a database. A SELECT command can specify the columns and rows to be

retrieved from one or more tables based on certain criteria or conditions. A SELECT command can

also use functions or operators to manipulate or filter the data. For example, a SELECT command can

use the BETWEEN operator to specify a time range for a date column89.

Reference := CompTIA IT

Fundamentals (ITF+) Study Guide, 2nd Edition, Chapter 5: Database Fundamentals3; SQL SELECT Statement - W3Schools10

A primary key is a value that uniquely identifies a database record or a row in a table. A primary key
can be a single column or a combination of columns that have unique values for each record. A
primary key ensures that each record can be distinguished from others and prevents duplicate
data. For example, in a database that stores information about employees, the employee ID column
can be used as a primary key for each employee record56.

Reference := CompTIA IT Fundamentals
(ITF+) Study Guide, 2nd Edition, Chapter 5: Database Fundamentals3; What is Primary Key? -
Definition from Techopedia7

A primary key is a value that uniquely identifies a database record or a row in a table. A primary key
can be a single column or a combination of columns that have unique values for each record. A
primary key ensures that each record can be distinguished from others and prevents duplicate
data. For example, in a database that stores information about employees, the employee ID column
can be used as a primary key for each employee record56.

Reference := CompTIA IT Fundamentals
(ITF+) Study Guide, 2nd Edition, Chapter 5: Database Fundamentals3; What is Primary Key? -
Definition from Techopedia7