mysql подсчитывает слова
SELECT description, LENGTH(TRIM(description)) - LENGTH(REPLACE(TRIM(description), ' ', '')) + 1 FROM test.city
Friendly Hawk
SELECT description, LENGTH(TRIM(description)) - LENGTH(REPLACE(TRIM(description), ' ', '')) + 1 FROM test.citySELECT COUNT(*) FROM count_demos;//returns the total number of values
SELECT COUNT(name) FROM employee; select table_name, sum(table_rows) as sum
from information_schema.tables
where table_schema = '[DB NAME]'
group by table_name
order by sum desc;SELECT sum( case when `tags_Column` CONTAINS 'tag2' then 1 else 0 end ) as tag2,
sum( case when `tags_Column` CONTAINS 'tag3' then 1 else 0 end ) as tag3,
.....
sum( case when `tags_Column` CONTAINS 'tag256' then 1 else 0 end ) as tag256,
sum( case when `tags_Column` CONTAINS `tag2` OR
`tags_Column` CONTAINS 'tag3`
then 0 else 1 end ) as doesnt_contains_tags_2_3
FROM `TableContainsTags`