Column database - Study guides, Class notes & Summaries

Data definition language - ️️DDL Data manipulation language - ️️DML CREAT SCHEMA AUTHORIZATION - ️️Creates a database schema CREATE TABLE - ️️Creates a new table in the user's databse schema NOT NULL - ️️Ensures that a column will not have null values UNIQUE - ️️Ensures that a column will not have duplicate values PRIMARY KEY - ️️Defines a primary key for a table FOREIGN KEY - ️️Defines a foreign key for a table DEFAULT - ️️Defines a d...

WGU - C175 Actula Exam Questions And Answers 2025 With Complete Solutions 1. Three Basic Characteristics Of Big Data Databases: Volume, Velocity, And Variety. A) 3 Vs B) 4 Vs C) Big Data Factors D) Data Attributes 2. Data Type That Describes A Set Of Similar Objects With Shared And Encapsulated Data Representation And Methods. A(N) ___ Is Generally Used To Describe Complex Objects. See Also Class. A) Abstract Data Type (ADT) B) Data Class C) Object-Oriented Data D) Structured Data...

DBI202 LATEST 2024 REAL EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) A GRADE What is the hierarchical data model? - Answer A hierarchical data model is a data model in which the data is organized into a tree-like structure A person who is responsible for the structure or schema of the database is called: - Answer a database administrator A database administrator (DBA) is a person that is also known by the title: - Answer Database Coordinator or Database Programmer A ___ is ...

CSCI 201 ACTUAL EXAM QUESTIONS AND ANSWERS ALL CORRECT A server can handle multiple clients by _______ A) ... starting a new thread for each client connected to the server B) ... serving one client at a time C) ... using different ports for different clients - Answer- A) ... starting a new thread for each client connected to the server Can I have two primary keys in a table? A) No, there can only be one primary key but it can span multiple columns. B) Yes, but you must edit the S...

AIT Final Exam 650 Questions with Verified Answers Structured Query Language (SQL) is generally used to interact with a database. - CORRECT ANSWER True A field is a basic unit of data also referred to as a record. - CORRECT ANSWER False A field in the logical design of a database corresponds to a row in the physical table of a relational database. - CORRECT ANSWER False Tables can be linked or joined together through their primary keys. - CORRECT ANSWER False Data is in second nor...

WGU D426 Study Guide (Latest 2024/ 2025 Update) Data Management Foundations | Questions and Verified Answers|100% Correct| Grade A Q: Crows Foot Notation Depicts cardinality as a circle (zero), or a short line (one), or three short lines (many). The short likes look like a bird's foot. Q: Single-level index Answer: A file containing column values, along with points to rows containing the column value. Q: Multi-column index Answer: A composite of values from all indexed ...

WGU D426 V2 Questions and Answers Already Passed What is a transaction in the context of a database? A transaction is a sequence of database operations that are treated as a single unit, ensuring that all operations are completed successfully or none at all, to maintain data integrity. What are ACID properties in database management? ACID properties—Atomicity, Consistency, Isolation, Durability—ensure that database transactions are processed reliably and maintain data integr...

CHDA EXAM QUESTIONS AND ANSWERS 100% CORRECTCHDA EXAM QUESTIONS AND ANSWERS 100% CORRECTCHDA EXAM QUESTIONS AND ANSWERS 100% CORRECTCHDA EXAM QUESTIONS AND ANSWERS 100% CORRECT When an Entity Relationship Diagram (ERD) is implemented as a relational database, an attribute will become a(n): - ANSWER-Field Attributes are the characteristics or data elements to be collected about each entity. They can be depicted in an ERD as oval shapes coming off an entity. Attributes become the fields or c...

PY4E: Chapter 15 (Part 2) Questions and Answers 100% Pass What is the purpose of the `SELECT` statement in SQL? To retrieve data from a database How do you sort the results of a query in SQL? By using the `ORDER BY` clause What is the role of `LIMIT` in an SQL query? To restrict the number of rows returned How do you count the number of rows in a table? By using the `COUNT()` function What is a foreign key used for in a database? To establish a relationship between two tab...

CS 514 Final Exam Study Questions | Answered with complete solutions The analysis phase of database design includes which process? Specifying requirements that are not dependent on a specific database system. When data is produced and stored as numeric, textual, or visual information, it varies in _____. Format A database designer installs MySQL Community Edition to create a database. Which account does the designer use to gain full control of MySQL? Root What does a user that interacts with ...