get average in sql code example
Example 1: sql count
/*COUNT(column_name) will return the number of rows from the column
that are not NULL*/
SELECT COUNT(column_name)
FROM table_name;
/*COUNT(*) will return the number of rows from the table*/
SELECT COUNT(*)
FROM table_name;
Example 2: sql avg()
/*AVG() is an aggregate function that returns the
average value for a numeric column*/
SELECT AVG(column_name)
FROM table_name;
Example 3: how to find average in sql
SELECT FIRST_NAME FROM EMPLOYEES
WHERE SALARY = (SELECT AVG(SALARY) FROM EMPLOYEES);