我需要在一个中返回两个查询的结果。我读过其他帖子,不确定这是否应该是内部连接。
我想要这两个查询:
MariaDB [servers]> select * from servers;
+----+------------+---------+------------+
| id | servername | ip | returncode |
+----+------------+---------+------------+
| 1 | server1 | 0.0.0.0 | 0 |
| 2 | server2 | 0.0.0.0 | 1 |
| 3 | server2 | 0.0.0.0 | 0 |
| 4 | server3 | 0.0.0.0 | 0 |
| 5 | server3 | 0.0.0.0 | 4 |
| 6 | server3 | 0.0.0.0 | 4 |
| 7 | server3 | 0.0.0.0 | 4 |
+----+------------+---------+------------+
MariaDB [servers]> select servername,count(returncode) from servers where returncode<>0 group by servername;
+------------+-------------------+
| servername | count(returncode) |
+------------+-------------------+
| server2 | 1 |
| server3 | 3 |
+------------+-------------------+
变成这样:
MariaDB [servers]> select ?????????
+----+------------+---------+------------+-------------------+
| id | servername | ip | returncode | count(returncode) |
+----+------------+---------+------------+-------------------+
| 1 | server1 | 0.0.0.0 | 0 | 0 |
| 2 | server2 | 0.0.0.0 | 1 | 1 |
| 3 | server2 | 0.0.0.0 | 0 | 1 |
| 4 | server3 | 0.0.0.0 | 0 | 3 |
| 5 | server3 | 0.0.0.0 | 4 | 3 |
| 6 | server3 | 0.0.0.0 | 4 | 3 |
| 7 | server3 | 0.0.0.0 | 4 | 3 |
+----+------------+---------+------------+-------------------+
有人可以帮我理解如何做到这一点吗?我觉得这是一个内部连接,但是我不确定我是否完全理解这个概念..