CREATE TABLE table_7442 ("geohash length" FLOAT, "lat bits" FLOAT, "lng bits" FLOAT, "lat error" TEXT, "lng error" TEXT, "km error" TEXT)

What is the highest geohash length when there is a ng error of 0.00017, and a lng bits smaller than 20?
SELECT MAX("geohash length") FROM table_7442 WHERE "lng error" = '±0.00017' AND "lng bits" < '20'
SELECT MAX("geohash length") FROM "table_7442" WHERE "lng bits" < '20' AND "lng error" = '±0.00017'