MYSQL SELECT AND COUNT MULTIPLE ROWS BY MONTH

Question

I am trying to get the calculated result, how many were sold in January, February from one query.

$query = "SELECT COUNT(id) FROM tableName WHERE status='sold' AND YEAR(FROM_UNIXTIME( date )) = '$year' AND MONTH(FROM_UNIXTIME( date )) = '1', status='sold' AND YEAR(FROM_UNIXTIME( date )) = '$year' AND MONTH(FROM_UNIXTIME( date`)) = '2'";

Answer 1

In order to compute aggregate values you have to use GROUP BY

SELECT EXTRACT(YEAR_MONTH FROM `date`) AS year_month, COUNT(*) AS cnt
FROM tableName
WHERE `status` = 'sold'
GROUP BY EXTRACT(YEAR_MONTH FROM `date`)

Keep in mind that, because of the function EXTRACT() used in the GROUP BY clause, MySQL cannot use an index to optimize the processing of the GROUP BY and, if the WHERE condition selects a large number of rows the query will be slow.