Mysql count table rows

Count of tables in database mysql

SELECT count(*) 
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA = 'database_name'

Mysql get all tables row count

# 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';

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;

Mysql select count if contains

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`

-1

Source: stackoverflow.com

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