Question

How do I select a checksum hash of a mysql table along with a row count?

select table_checksum,count(*) from activity

I am getting the following exception:

12:39:33 select table_checksum, count(*) from activity LIMIT 0, 1000
Error Code: 1054. Unknown column ‘table_checksum’ in ‘field
list’ 0.031 sec

Answer 1

CHECKSUM TABLE can’t be used directly in a SELECT clause.
You have to call it separately:
CHECKSUM TABLE activity and you get two columns, table name (TABLE) and checksum (CHECKSUM).