0
执行我写了一个查询在MySQL的表来获取最新的税所有国家的。相同的查询在phpmyadmin（本地主机）和执行SQL提琴。两个结果都不一样。但SQL小提琴产生正确的结果。不同的结果相同的SELECT查询时上的phpmyadmin和SQL小提琴
我能找到发布堆栈溢出早些时候在这个Link
我没有从任何后帮助同样的问题。我的问题是如何得到phpmyadmin（本地主机）为SELECT我写下面的查询得到正确的结果;我的SELECT查询有问题吗？
选择查询：（我在这两个PHPMYADMIN和SQL小提琴伏法）
SELECT
t1.id, t1.country,
t1.tax, t1.created_by,
t1.created_on, t1.modified_by, t1.modified_on
FROM tax t1
INNER JOIN
(
SELECT country, MAX(created_on) AS latest
FROM tax GROUP BY country
) t4 ON t1.created_on=t4.latest AND t1.country=t4.country;
表
+-------------+--------------+------+-----+-------------------+-----------------
------------+
| Field | Type | Null | Key | Default | Extra
|
+-------------+--------------+------+-----+-------------------+-----------------
------------+
| id | int(11) | NO | PRI | NULL | auto_increment
|
| country | int(11) | NO | | NULL |
|
| tax | decimal(8,5) | NO | | NULL |
|
| created_by | int(11) | NO | | NULL |
|
| created_on | timestamp | NO | | CURRENT_TIMESTAMP |
|
| modified_by | int(11) | YES | | NULL |
|
| modified_on | timestamp | YES | | NULL | on update CURREN
T_TIMESTAMP |
+-------------+--------------+------+-----+-------------------+-----------------
------------+
创建表查询：（这是我在SQL小提琴试过）
CREATE TABLE tax (id int(11) NOT NULL AUTO_INCREMENT, country int(11) NOT NULL, tax decimal(8,5) NOT NULL, created_by int(11) NOT NULL, created_on timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, modified_by int(11) DEFAULT NULL, modified_on timestamp NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (id));
INSERT INTO tax(country, tax, created_by, created_on) VALUES (1,7,51,'2015-06-26 16:26:20');
INSERT INTO tax(country, tax, created_by, created_on) VALUES (1,7,51,'2015-06-26 16:26:20');
INSERT INTO tax(country, tax, created_by, created_on) VALUES (1,7,49,'2015-06-26 16:26:20');
INSERT INTO tax(country, tax, created_by, created_on) VALUES (1,7,50,'2015-06-26 16:26:20');
INSERT INTO tax(country, tax, created_by, created_on) VALUES (1,7,48,'2015-06-26 16:26:20');
INSERT INTO tax(country, tax, created_by, created_on) VALUES (6,9.45450,51,'2015-06-26 16:26:20');
INSERT INTO tax(country, tax, created_by, created_on) VALUES (3,8.88900,49,'2015-06-26 16:26:20');
INSERT INTO tax(country, tax, created_by, created_on) VALUES (2,9.08989,49,'2015-06-26 16:26:20');
INSERT INTO tax(country, tax, created_by, created_on) VALUES (2,4.00087,49,'2015-06-26 16:26:20');
INSERT INTO tax(country, tax, created_by, created_on) VALUES (1,1.88900,49,'2015-06-26 16:26:20');
INSERT INTO tax(country, tax, created_by, created_on) VALUES (4,5.54656,51,'2015-06-26 16:26:20');
INSERT INTO tax(country, tax, created_by, created_on) VALUES (5,7.45435,50,'2015-06-26 16:26:20');
INSERT INTO tax(country, tax, created_by, created_on) VALUES (1,43.88776,46,'2015-06-26 17:30:18');
INSERT INTO tax(country, tax, created_by, created_on) VALUES (2,5.67,46,'2015-06-26 17:39:12');
INSERT INTO tax(country, tax, created_by, created_on) VALUES (12,0.009,46,'2015-06-26 17:48:35');
INSERT INTO tax(country, tax, created_by, created_on) VALUES (11,3,46,'2015-06-26 17:55:14');
INSERT INTO tax(country, tax, created_by, created_on) VALUES (1,5,46,'2015-06-26 17:55:39');
结果在phpMyAdmin（本地主机）生产
+----+---------+---------+------------+---------------------+-------------+-----
--------+
| id | country | tax | created_by | created_on | modified_by | modi
fied_on |
+----+---------+---------+------------+---------------------+-------------+-----
--------+
| 3 | 3 | 7.00000 | 49 | 2015-06-26 16:26:20 | NULL | NULL
|
| 5 | 5 | 7.00000 | 48 | 2015-06-26 16:26:20 | NULL | NULL
|
| 6 | 6 | 9.45450 | 51 | 2015-06-26 16:26:20 | NULL | NULL
|
| 7 | 3 | 8.88900 | 49 | 2015-06-26 16:26:20 | NULL | NULL
|
| 11 | 4 | 5.54656 | 51 | 2015-06-26 16:26:20 | NULL | NULL
|
| 12 | 5 | 7.45435 | 50 | 2015-06-26 16:26:20 | NULL | NULL
|
| 14 | 2 | 5.67000 | 46 | 2015-06-26 17:39:12 | NULL | NULL
|
| 15 | 12 | 0.00900 | 46 | 2015-06-26 17:48:35 | NULL | NULL
|
| 16 | 11 | 3.00000 | 46 | 2015-06-26 17:55:14 | NULL | NULL
|
| 17 | 1 | 5.00000 | 46 | 2015-06-26 17:55:39 | NULL | NULL
|
+----+---------+---------+------------+---------------------+-------------+-----
--------+
您得到不同结果的明显原因是您使用不同的源数据。在phpmyadmin的输出示例中，有两行不存在于使用sql fiddle的数据集中。 – jpw
哦，我的坏。你是对的？现在我得到了两个结果相同@jpw –
可以帮助我编写查询以获取每个“国家”的所有最新“税”而不会有重复吗？ –