10 Questions
Match the following RDBMS integrity constraints with their descriptions:
Entity Integrity Constraints = Restrict the values in a row of an individual table Referential Integrity Constraints = Specifies that a row of one table that refers to another row must refer to an existing row in that table Domain Integrity Constraints = Includes Not null and Check constraints Key Constraints = Subcategory of Entity Integrity Constraints
Match the following characteristics of NULL value with their descriptions:
A NULL value distinct from zero or other numeric value for numerical data = Characteristic of NULL value A NULL value indicates ‘not applicable’, ‘missing’, or ‘not known’ = Characteristic of NULL value General-purpose programming = Python Client-side scripting for web applications = JavaScript
Match the following subcategories of Entity Integrity Constraints with their descriptions:
Domain Integrity Constraints = Subcategory of Entity Integrity Constraints Key Constraints = Subcategory of Entity Integrity Constraints Restrict the values in a row of an individual table = Entity Integrity Constraints Specifies that a row of one table that refers to another row must refer to an existing row in that table = Referential Integrity Constraints
Match the following general characteristics of Constraints provided by Oracle with their descriptions:
A rule that restricts the values that may be present in the database = Constraint Constraints provided by Oracle follows the general Constraints provided by relational model = Oracle-based Constraints Database queries = SQL Styling web pages = CSS
Match the following descriptions of NOT NULL Constraints with their characteristics:
There may be Records in table that do not contain any value for some fields = NOT NULL Constraints Null values are stored in such fields, representing an empty field = NOT NULL Constraints Subcategory of Entity Integrity Constraints = Key Constraints Specifies that a row of one table that refers to another row must refer to an existing row in that table = Referential Integrity Constraints
Explain the two broad categories into which database integrity constraints can be classified.
The two broad categories into which database integrity constraints can be classified are Entity Integrity Constraints and Referential Integrity Constraints.
What are Entity Integrity Constraints and how are they further classified?
Entity Integrity Constraints are constraints that restrict the values in a row of an individual table. They are further classified into Domain Integrity Constraints and Key Constraints.
What is the purpose of Referential Integrity Constraints?
Referential Integrity Constraints specify that a row of one table that refers to another row must refer to an existing row in that table.
Explain the NOT NULL Constraints in Oracle and their characteristics.
The NOT NULL Constraints ensure that there are no records in a table that do not contain any value for certain fields. In Oracle, Null values are stored in such fields. A NULL value represents 'not applicable', 'missing', or 'not known', and is distinct from zero or other numeric values for numerical data.
How are NULL values stored in Oracle and what do they represent?
In Oracle, Null values are stored in fields that do not contain any value. A NULL value represents 'not applicable', 'missing', or 'not known', and is distinct from zero or other numeric values for numerical data.
Test your knowledge of database integrity constraints and object constraints in RDBMS with this quiz. Explore the rules that restrict values in a database and understand how Oracle's constraints align with the relational model. Assess your understanding of the classification and application of these constraints in the context of Oracle databases.
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