CREATE TABLE web_client_accelerator (id NUMBER, name CLOB, operating_system CLOB, client CLOB, connection CLOB)
CREATE TABLE browser (id NUMBER, name CLOB, market_share NUMBER)
CREATE TABLE accelerator_compatible_browser (accelerator_id NUMBER, browser_id NUMBER, compatible_since_year NUMBER)

How many main stream browsers whose market share is at least 5 exist?
SELECT COUNT(*) FROM browser WHERE market_share >= 5
SELECT COUNT(*) FROM "browser" WHERE "market_share" >= 5