Free Online Firebird 4.0 (Employee) Playground: Practice & Master SQL Skills

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SELECT J.JOB_TITLE, J.MIN_SALARY, J.MAX_SALARY FROM JOB J LEFT JOIN JOB_REQUIREMENT JR ON J.JOB_CODE = JR.JOB_CODE -- Или J.JOB_ID = JR.JOB_ID WHERE JR.JOB_CODE IS NULL -- Или JR.JOB_ID IS NULL ORDER BY J.MAX_SALARY DESC; ; SELECT 'Last_query_cost' AS "Variable_name", 0 AS "Value" FROM RDB$DATABASE;

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