我已经看到有一些类似的问题已经退出，但是我还不了解如何自己编写代码。请记住，我只是该领域的初学者。
基本上我想像这样旋转表：
zoom | day | point zoom | 2015-10-01 | 2015-10-02 | ......
------+-----------+------- ---> ------+------------+-------------+
1 | 2015-10-01 | 201 1 | 201 | 685 |
2 | 2015-10-01 | 43 2 | 43 | 346 |
3 | 2015-10-01 | 80 3 | 80 | 534 |
4 | 2015-10-01 | 324 4 | 324 | 786 |
5 | 2015-10-01 | 25 5 | 25 | 685 |
1 | 2015-10-02 | 685
2 | 2015-10-02 …创建临时表
CREATE TEMP TABLE total(
gid SERIAL,
zoom smallint NOT NULL,
point integer NOT NULL,
size integer NOT NULL
);
插入数据
INSERT INTO total(zoom, point, size) VALUES(9,51,21);
INSERT INTO total(zoom, point, size) VALUES(9,75,45);
INSERT INTO total(zoom, point, size) VALUES(9,74,34);
INSERT INTO total(zoom, point, size) VALUES(10,75,4);
INSERT INTO total(zoom, point, size) VALUES(10,72,63);
INSERT INTO total(zoom, point, size) VALUES(10,85,22);
计数点，根据缩放增加尺寸
SELECT zoom,
count(*) AS point,
SUM(size) AS size
FROM total
GROUP BY zoom
ORDER BY zoom;
结果：
zoom | point | size …