Gebruik SUM/CASE...
SELECT
COUNT(*), --total
SUM(CASE WHEN name = 'system' THEN 1 ELSE 0 END) --conditional
FROM
myTable
Gebruik SUM/CASE...
SELECT
COUNT(*), --total
SUM(CASE WHEN name = 'system' THEN 1 ELSE 0 END) --conditional
FROM
myTable