count id in mysql code example

Example 1: select count from table mysql

SELECT COUNT(*) FROM count_demos;

Example 2: set id count mysql

ALTER TABLE name AUTO_INCREMENT=310;

Example 3: mysql count table rows

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;