liczba tabel w bazie danych mysql
SELECT count(*)
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA = 'database_name'
Snippets
SELECT count(*)
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA = 'database_name'# get row count of all tables in all database in this server
select table_name, table_schema,table_rows from information_schema.tables;
# get row count of all tables in testdb database
select table_name, table_schema,table_rows from information_schema.tables where table_schema='testdb';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`