Which of the following is not a valid data type in a relational databa...
Array is not a valid data type in a relational database. Common data types include integers, text, boolean, float, etc.
Which of the following is not a valid data type in a relational databa...
Invalid Data Type in a Relational Database
In a relational database, data is organized into tables consisting of rows and columns. Each column in a table has a specific data type that defines the kind of data it can store. The most commonly used data types in a relational database include integer, text, and boolean. However, arrays are not a valid data type in a relational database.
Explanation:
1. Integer:
- Integer is a valid data type in a relational database.
- It represents whole numbers without decimal places.
- It can store both positive and negative values.
- Examples: 1, 2, -10, 100, etc.
2. Text:
- Text is another valid data type in a relational database.
- It is used to store alphanumeric characters and textual data.
- It can hold a variable length of characters.
- Examples: "Hello", "World", "123abc", etc.
3. Boolean:
- Boolean is also a valid data type in a relational database.
- It represents logical values of either true or false.
- It is often used to store binary information or as a flag to indicate the state of a condition.
- Examples: true, false.
4. Array:
- Arrays are not a valid data type in a relational database.
- An array is a collection of elements that can be of different data types.
- Arrays are typically used in programming languages to store multiple values under a single variable.
- However, in a relational database, each column in a table should have a single data type.
- Instead of using arrays, relational databases use multiple tables and relationships to store and retrieve data efficiently.
Conclusion:
In a relational database, arrays are not a valid data type. The valid data types include integer, text, and boolean, which are commonly used to store different kinds of data in the tables.
To make sure you are not studying endlessly, EduRev has designed Software Development study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Software Development.