SQL：指向矩形的点列表
我有两张桌子：SQL：指向矩形的点列表,sql,points,regions,Sql,Points,Regions,我有两张桌子： regions <id> points <region_id, x, y> 区域 要点 假设每个区域正好有4个点，这些点描述了一个矩形——是否有SQL查询可以为我提供以下视图： rectangular_regions <region_id, x1, y1, x2, y2> 矩形_区域 ? SELECT region_id, MIN(x) AS x1, MIN(y) AS y1, MAX(x) AS x2, MAX(y) AS y2 F
regions <id>
points <region_id, x, y>
区域
要点
rectangular_regions <region_id, x1, y1, x2, y2>
矩形_区域
SELECT region_id, MIN(x) AS x1, MIN(y) AS y1, MAX(x) AS x2, MAX(y) AS y2
FROM points
GROUP BY region_id.