1)查询表中重复数据

SELECT * FROM "tbScenics"
WHERE "Scenic_Id"
NOT IN (
SELECT max("Scenic_Id")
FROM "tbScenics"
GROUP BY "Scenic_Name","Scenic_Des","Scenic_Price","Scenic_Ticket"

);

2)删除表中重复数据 DELETE * FROM "tbScenics" WHERE "Scenic_Id" NOT IN ( SELECT max("Scenic_Id") FROM "tbScenics" GROUP BY "Scenic_Name","Scenic_Ticket" );

原文链接：https://www.f2er.com/postgresql/194759.html