我正在尝试连接两个表,并遵循每一步,但我一直收到这个错误“缺少表”turbocharger的FROM-子句条目。我有两个表:turbocharger和engine。以下是查询:FROM "Engine"
FULL OUTER JOIN "Turbocharger" ON Turbocharger.Manufacturer_ID = Engine.Manufacturer_ID
我尝试使用UNION将前半部分中的total列附加到查询的后半部分。SELECT NULL as month, NULL as active, count(cage_player_id) as totalGROUP BYGROUP BY date_part('month', p.signup_date)我一直收到一个错误,说表p缺