SQL

mysql select multiple rows into one column

SELECT
	GROUP_CONCAT(DISTINCT id SEPARATOR ', ') AS 'ids'
FROM
	table_name
WHERE
	column_name = 'value'

mysql count multiple columns in one query

mysql count multiple columns in one query:
 SELECT 
        count(*)             as count_rows,
        count(col1)          as count_1,
        count(col2)          as count_2,
        count(distinct col1) as count_distinct_1,
        count(distinct col2) as count_distinct_2,
        count(distinct col1, col2) as count_distinct_1_2
    FROM `table` ;