Podcast
Questions and Answers
Match the following database terms with their definitions:
Match the following database terms with their definitions:
Primary Key = Each table can only have one primary key. Unique = Ensures that a column cannot contain duplicate values. Foreign Key = Creates a relationship between two tables. Linking = It is used to link data in one table to another table.
Match the following entities with their attributes:
Match the following entities with their attributes:
Student = id, name, major, grade Instructor = id, salary, name Department = id, name Course = id, name
Match the following relationships with their types:
Match the following relationships with their types:
Student-Course = M:M Course-Section = 1:M Department-Course = 1:M Instructor-Department = M:1
Match the following entities with their ER Diagram representations:
Match the following entities with their ER Diagram representations:
Signup and view all the answers
Match the following entity types with their examples:
Match the following entity types with their examples:
Signup and view all the answers
Match the following terms with their definitions:
Match the following terms with their definitions:
Signup and view all the answers
Match the following elements of a database with their corresponding functions:
Match the following elements of a database with their corresponding functions:
Signup and view all the answers
Match the following types of database components with their descriptions:
Match the following types of database components with their descriptions:
Signup and view all the answers
Match the following database concepts with their applications:
Match the following database concepts with their applications:
Signup and view all the answers
Match the following aspects of database design with their roles:
Match the following aspects of database design with their roles:
Signup and view all the answers
Match the SQL commands with their descriptions:
Match the SQL commands with their descriptions:
Signup and view all the answers
Match the SQL data types with their characteristics:
Match the SQL data types with their characteristics:
Signup and view all the answers
Match the SQL commands with their effects on the database:
Match the SQL commands with their effects on the database:
Signup and view all the answers
Match the SQL function types with their purposes:
Match the SQL function types with their purposes:
Signup and view all the answers
Match the SQL constraints with their definitions:
Match the SQL constraints with their definitions:
Signup and view all the answers
Match the following database constraints with their descriptions:
Match the following database constraints with their descriptions:
Signup and view all the answers
Match the following terms with their roles in a database:
Match the following terms with their roles in a database:
Signup and view all the answers
Match the following SQL keywords with their purposes:
Match the following SQL keywords with their purposes:
Signup and view all the answers
Match the following database normalization forms with their objectives:
Match the following database normalization forms with their objectives:
Signup and view all the answers
Match the following SQL statements with their functions:
Match the following SQL statements with their functions:
Signup and view all the answers
Match the following SQL keywords with their primary functions:
Match the following SQL keywords with their primary functions:
Signup and view all the answers
Match the following SQL operations with their intended purposes:
Match the following SQL operations with their intended purposes:
Signup and view all the answers
Match the following SQL data types with their descriptions:
Match the following SQL data types with their descriptions:
Signup and view all the answers
Match the following SQL functions with their functionality:
Match the following SQL functions with their functionality:
Signup and view all the answers
Match the following SQL clauses with their contexts:
Match the following SQL clauses with their contexts:
Signup and view all the answers
Study Notes
Database Design
- Database design involves analysis, entity-relationship diagrams (ER-diagrams), schema, DDL (Data Definition Language), and DML (Data Manipulation Language).
- Analysis phase involves identifying entities, attributes, and relationships.
- Entities represent objects or concepts.
- Attributes describe the characteristics of entities.
- Relationships define how entities relate to each other.
- ER-diagrams visually represent the structure of a database.
- Schema defines the logical structure of the database.
- DDL is used to define the database structure.
- DML is used to manipulate database data.
Attributes
- Key Attributes: Unique identifiers (e.g., ID, serial number, SSN).
- Composite Attributes: Composed of multiple smaller attributes (e.g., address).
- Single-valued Attributes: Have one value for each entity (e.g., name).
- Multi-valued Attributes: Can have multiple values for an entity (e.g., phone numbers).
- Derived Attributes: Calculated from other attributes (e.g., age).
Relationships
- Cardinality Ratio: Describes the relationship between entities.
- 1:1 (one-to-one): One entity relates to one other entity (e.g., a person has one driver's license).
- 1:M (one-to-many): One entity can relate to many other entities (e.g., a teacher teaches many students).
- M:M (many-to-many): Many entities can relate to many other entities (e.g., students can take many courses and courses can have many students).
- Participation Constraint: Describes whether an entity in a relationship is mandatory or optional.
- Total participation: Every entity must be involved in at least one relationship.
- Partial participation: An entity may or may not be involved in a relationship.
- Entity Relationships: Describes relationships between entities; examples include binary, recursive, and ternary relationships.
Strong vs. Weak Entities
- Strong entities have their own unique identifier.
- Weak entities do not have their own unique identifier.
Data Types
- char(n): Fixed-length string of n characters. If fewer than n characters are stored, the rest are filled with spaces.
- varchar(n): Variable-length string that can store up to n characters.
Constraints
- Constraints ensure data integrity.
- Not Null: Ensures a column cannot have a null value.
- Unique: Ensures that all values in the column are unique.
- Primary Key: A unique identifier for a table.
- Foreign Key: A key in one table that references a primary key in another table.
- Check: Ensures that values in a column satisfy a condition.
- Default: Provides a default value if no value is explicitly specified.
Database Operations
- DML are SQL commands involving data in the database. Specific DML commands include INSERT, UPDATE, DELETE, and SELECT.
- DDL are SQL commands defining the structure of the database. These include commands like CREATE, ALTER, and DROP.
Database Conversion Process
- Mapping algorithms are used converting an ERD to a relational schema.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Test your knowledge on various database terms, relationships, and SQL commands with this comprehensive quiz. Match elements such as entities, attributes, and constraints to enhance your understanding of database design and functionality. Ideal for students and professionals looking to strengthen their database skills.