“Bagaimana menemukan rata -rata di SQL” Kode Jawaban

Hitungan SQL

/*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;
Androidre

Bagaimana menemukan rata -rata di SQL

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

bagaimana melakukan rata -rata pada sql hitungan

SELECT avg(count)
  FROM 
    (
    SELECT COUNT (*) AS Count
      FROM Table T
     WHERE T.Update_time =
               (SELECT MAX (B.Update_time )
                  FROM Table B
                 WHERE (B.Id = T.Id))
    GROUP BY T.Grouping
    ) as counts
Shy Seal

Gaji di atas rata -rata di SQL

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

Temukan gaji di bawah rata -rata di SQL

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

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