<|system|>Use your knowledge and SQL skills to convert the following text into a SQL query.
Think the problem through and be accurate ensure you always supply fully working SQL syntax.

SQL Statments should be wrapped in <codestart type="sql"> and </codeend> tags.

Example output:
<codestart type="sql">SELECT * FROM table_name;</codeend>
<codestart type="sql">SELECT column_name FROM table_name WHERE column_name = 'value';</codeend><|end|><|user|>How many companies operates airlines in each airport?

SQL Table Create Statement:
CREATE TABLE airport (id VARCHAR); CREATE TABLE flight (Id VARCHAR); CREATE TABLE operate_company (id VARCHAR)<|end|><|assistant|><codestart type="sql">SELECT T3.id, COUNT(*) FROM operate_company AS T1 JOIN flight AS t2 ON T1.id = T2.company_id JOIN airport AS T3 ON T2.airport_id = T3.id GROUP BY T3.id</codeend><|end|>