SELECT AVG(example_code__huc_) FROM table_name_35 WHERE example_name = "lower snake" AND digits = 6 AND level < 3
Apa kode contoh HUC rata -rata ketika contoh ular bawah nama contoh, ada 6 digit, dan kurang dari 3 level?
CREATE TABLE table_name_35 (example_code__huc_ INTEGER, level VARCHAR, example_name VARCHAR, digits VARCHAR)