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use information_schema;
select variable_name, s.variable_value, v.global_value
from global_variables s join system_variables v using (variable_name)
where not (s.variable_value <=> v.global_value);
variable_name variable_value global_value
select variable_name, s.variable_value, v.session_value
from session_variables s join system_variables v using (variable_name)
where v.variable_scope != 'GLOBAL' and
not (s.variable_value <=> v.session_value);
variable_name variable_value session_value
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