Where I am there are a lot of houses with drain tile on the inside of the footing. Where the water table is near floor level, it was not uncommon to run drain tiles crossing from side to side in shallow trenches backfilled filled with crushed stone before pouring the slab.
The drain can be another issue. Airflow is not coming out of the ground. In a perfect world one's drain tile could gravity drain to daylight somewhere lower than the footing- then there would be no need for a sump pump.