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Consider the following relation.
Table: Customers(C_id, C_name, C_age, C_Country)
What is the output for the given SQL Query?
Query:
ALTER TABLE Customers
ADD income INT;
What is the degree of the customer relationship?
  • a)
    4
  • b)
    5
  • c)
    6
  • d)
    error
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Consider the following relation.Table: Customers(C_id, C_name, C_age, ...
The correct answer is option B.
Concept:
Add an attribute to an existing table:
Sometimes, we may need to add an additional attribute to a table. It can be done using the syntax given below:
Syntax:
ALTER TABLE table_name ADD attribute_name DATATYPE;
DEGREE:
The number of attributes in a relation is called the Degree of the relation.
Explanation:
The customer relation adds a new attribute to the customer relationship. Now the Customers relation becomes the Customers(C_id, C_name, C_age, C_Country, income)
Query:
ALTER TABLE Customers
ADD income INT;
Hence the degree of the relation becomes 5.
Hence the correct answer is 5.
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Community Answer
Consider the following relation.Table: Customers(C_id, C_name, C_age, ...
Explanation:

The given SQL query is:

```
ALTER TABLE Customers
ADD income INT;
```

This query is used to add a new column named "income" to the existing table "Customers". The data type of the new column is specified as "INT", which means it will store integer values.

To determine the degree of the customer relationship, we need to count the number of attributes or columns in the table "Customers". The degree of a relation refers to the number of attributes or columns in a table.

The given table "Customers" has the following attributes or columns:
1. C_id
2. C_name
3. C_age
4. C_Country
5. income (added by the ALTER TABLE statement)

Therefore, the degree of the customer relationship is 5. Thus, option 'B' is the correct answer.

Summary:
The SQL query adds a new column named "income" to the table "Customers". The degree of the customer relationship is the number of attributes or columns in the table, which is 5 in this case.
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Consider the following relation.Table: Customers(C_id, C_name, C_age, C_Country)What is the output for the given SQL Query?Query:ALTER TABLE CustomersADD income INT;What is the degree of the customer relationship?a)4b)5c)6d)errorCorrect answer is option 'B'. Can you explain this answer?
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