Table: cable_internet_plans
Columns: plan
downstream
upstream
up_down_ratio
monthly_cap
price

Question: What is the highest up:down ratio with 4 mbit/s upstream?
SQL: SELECT MAX("up_down_ratio") FROM cable_internet_plans WHERE "upstream" = '4 mbit/s'

Question: What is the upstream with a 150 gb monthly cap?
SQL: SELECT "upstream" FROM cable_internet_plans WHERE "monthly_cap" = '150 gb'

Question: What is the upstream with an up:down ratio of 0.03 and a 150 gb monthly cap?
SQL: SELECT "upstream" FROM cable_internet_plans WHERE "up_down_ratio" = 0.03 AND "monthly_cap" = '150 gb'