What does avg mean in sql

In SQL, the AVG function calculates the average of a given column or expression. Here are the steps: 1. Specify the column or expression to calculate the average. 2. Apply the function to the data set for which the average needs to be calculated.

AVG in SQL

In SQL, AVG is an aggregate function used to calculate a set of The average of the values. The average is the sum of all values ​​divided by the number of values.

Syntax

<code>AVG(expression)</code>

Where expression is the column or expression that needs to be calculated.

how to use?

When using the AVG function to calculate the average, you can use the following steps:

• Specify a column or expression: In the AVG function Parameters specify the column or expression to calculate the average. For example, to calculate the average of the column named "salary", you would use the following code:

  <code>AVG(salary)</code>

• Apply to the data set: Apply the AVG function to the desired Calculate the average value on the data set. For example, to calculate the average of the "salary" column in the table "employees", you can use the following query:

  <code>SELECT AVG(salary) FROM employees;</code>

Example

Below The example shows how to use the AVG function to calculate the average of the "salary" column in the "employees" table:

<code>SELECT AVG(salary) AS average_salary FROM employees;</code>

The query results will display the "average_salary" column, which contains the average of the "salary" column.

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