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How to Apply Avg Function on Top Of Select Query In Oracle?

4 minutes read

To apply the AVG function on top of a SELECT query in Oracle, you would need to use the AVG function in your SELECT statement. For example, if you have a table called 'employees' and you want to find the average salary of all employees, you can write a query like this:


SELECT AVG(salary) as average_salary FROM employees;


This query will calculate the average salary of all employees in the 'employees' table and display the result as 'average_salary'. You can also use the AVG function with other conditions or clauses in your SELECT query to further refine the results as needed.


How to filter specific data before applying AVG function in Oracle?

To filter specific data before applying the AVG function in Oracle, you can use a WHERE clause in your SQL query to exclude unwanted rows.


Here's an example of how you can filter specific data before calculating the average using the AVG function:

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SELECT AVG(column_name) 
FROM table_name 
WHERE condition;


Replace column_name with the column you want to calculate the average for, table_name with the name of the table you are selecting data from, and condition with the specific filter criteria you want to apply.


For example, if you want to calculate the average of a column named sales_amount from a table named sales_data for only the sales made in January, you can use the following query:

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SELECT AVG(sales_amount) 
FROM sales_data 
WHERE MONTH(sales_date) = 1;


This query will calculate the average sales amount for only the sales made in January. You can adjust the WHERE clause based on your specific filtering requirements.


How to use AVG function with SELECT query in Oracle?

To use AVG() function with SELECT query in Oracle, you need to follow these steps:

  1. Open your SQL command line or Oracle SQL Developer.
  2. Write a SELECT query that includes the AVG() function. The syntax for using AVG() function is as follows: 
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SELECT AVG(column_name) 
FROM table_name;


Replace "column_name" with the name of the column for which you want to calculate the average, and "table_name" with the name of the table containing that column.

  1. Execute the query by pressing the Enter key or clicking the "Execute" button.
  2. The query will return the average value of the specified column from the table.


For example, if you want to find the average salary of employees from the "employees" table, you can use the following query:

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SELECT AVG(salary) 
FROM employees;


This will calculate the average salary of all employees in the "employees" table and return the result.


What is the syntax for using AVG function in Oracle?

The syntax for the AVG function in Oracle is:

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SELECT AVG(column_name)
FROM table_name;


In this syntax:

  • AVG is the function that calculates the average value of a column.
  • column_name is the name of the column for which you want to calculate the average.
  • table_name is the name of the table containing the column you want to calculate the average for.


How to display average value in Oracle query output?

You can display the average value in the Oracle query output by using the AVG() function. Here is an example of how you can do this:

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SELECT AVG(column_name) AS average_value
FROM your_table;


In this query, replace column_name with the name of the column for which you want to calculate the average value, and your_table with the name of your table.


When you run the query, it will return the average value of the specified column as average_value in the output.


What is the output format of AVG function in Oracle?

The output format of the AVG function in Oracle is a numeric value with up to 38 digits of precision.


How to calculate average value within a specific range using AVG function in Oracle?

To calculate the average value within a specific range using the AVG function in Oracle, you need to use the WHERE clause to specify the range of values you want to include in the calculation. Here is the general syntax:

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SELECT AVG(column_name) 
FROM table_name
WHERE column_name BETWEEN lower_bound AND upper_bound;


In this syntax:

  • column_name is the name of the column that contains the values you want to calculate the average for.
  • table_name is the name of the table that contains the column.
  • lower_bound and upper_bound are the lower and upper bounds of the specific range of values you want to include in the calculation.


For example, if you have a table named sales_data with a column named sales_amount and you want to calculate the average sales amount for products with ID between 100 and 200, you would use the following query:

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SELECT AVG(sales_amount) 
FROM sales_data
WHERE product_id BETWEEN 100 AND 200;


This query will return the average value of the sales_amount column for products with ID between 100 and 200 in the sales_data table.

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