How to find average in sql

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;

How to find average in sql

SELECT FIRST_NAME FROM EMPLOYEES
WHERE SALARY = (SELECT AVG(SALARY) FROM EMPLOYEES);

Find below average salary in sql

SELECT first_name, salary FROM employees
WHERE salary <= (SELECT AVG(salary) FROM employees);

Above average salary in sql

SELECT FIRST_NAME FROM EMPLOYEES
WHERE SALARY > (SELECT AVG(SALARY) FROM EMPLOYEES);

Similar codes

0 vote134 views1 answer
Create table with primary key and foreign key in sql server
SQL
0 vote128 views1 answer
How to connect pgadmin with excel
SQL
3 votes124 views3 answers
Concatenation in sql
SQL
0 vote154 views2 answers
Php convert dbf to mysql
SQL
22 votes144 views6 answers
Create sql table
SQL
0 vote140 views1 answer
Sql query to force the database to be drop
SQL
0 vote150 views4 answers
What is unique key in sql
SQL
0 vote143 views1 answer
Django mysqlclient connection string
SQL
11 votes159 views4 answers
Reset identity column values in sql server
SQL
10 votes137 views2 answers
Oracle alter sequence nextval
SQL