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SQL: Display the sum of two numbers

SQL Basic Select Statement: Exercise-4 with Solution.

Write a SQL query to display the sum of two numbers 10 and 15 from the RDBMS server.

Sample Solution:

SELECT 10 + 15;

Output of the Query:

?column?
25

Explanation:

Syntax of display sum of two numbers

Pictorial presentation:

Result of the sum of two numbers

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Query Visualization:

Duration:

Query visualization of Display sum of two numbers - Duration

Rows:

Query visualization of Display sum of two numbers - Rows

Cost:

Query visualization of Display sum of two numbers - Cost

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Previous: Write a query to display three numbers in three columns.
Next: Write a query to display the result of an arithmetic simplification.

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SQL: Tips of the Day

Can a foreign key be NULL and/or duplicate?

First remember a Foreign key simply requires that the value in that field must exist first in a different table (the parent table). That is all an Foreign key is by definition. Null by definition is not a value. Null means that we do not yet know what the value is.

Ref: https://bit.ly/3uVu3OS