MySQL中如何横向显示结果集
当我们的查询结果字段比较多的时候，显示会比较乱，比如查询mysql数据库中的user表，一般查询会显示如下：(root@localhost) > select * from user;
+-----------------------+------+-------------------------------------------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+--------------+-----------+------------+-----------------+------------+------------+--------------+------------+-----------------------+------------------+--------------+-----------------+------------------+------------------+----------------+---------------------+--------------------+------------------+----------+------------+-------------+--------------+---------------+-------------+-----------------+----------------------+
|Host | User |Password | Select_priv | Insert_priv |Update_priv | Delete_priv | Create_priv | Drop_priv | Reload_priv |Shutdown_priv | Process_priv | File_priv | Grant_priv | References_priv| Index_priv | Alter_priv | Show_db_priv | Super_priv |Create_tmp_table_priv | Lock_tables_priv | Execute_priv |Repl_slave_priv | Repl_client_priv | Create_view_priv | Show_view_priv| Create_routine_priv | Alter_routine_priv | Create_user_priv |ssl_type | ssl_cipher | x509_issuer | x509_subject | max_questions |max_updates | max_connections | max_user_connections |
+-----------------------+------+-------------------------------------------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+--------------+-----------+------------+-----------------+------------+------------+--------------+------------+-----------------------+------------------+--------------+-----------------+------------------+------------------+----------------+---------------------+--------------------+------------------+----------+------------+-------------+--------------+---------------+-------------+-----------------+----------------------+
|localhost | root| | Y | Y | Y | Y | Y | Y | Y |Y | Y | Y | Y | Y | Y | Y | Y | Y |Y | Y | Y |Y | Y | Y | Y | Y | Y | Y | | | | | 0| 0 | 0 | 0 |
|localhost.localdomain | root| | Y | Y | Y | Y | Y | Y | Y |Y | Y | Y | Y | Y | Y | Y | Y | Y |Y | Y | Y |Y | Y | Y | Y | Y | Y | Y | | | | | 0| 0 | 0 | 0 |
|127.0.0.1 | root| | Y | Y | Y | Y | Y | Y | Y |Y | Y | Y | Y | Y | Y | Y | Y | Y |Y | Y | Y |Y | Y | Y | Y | Y | Y | Y | | | |
。。。。。。
这个结果几乎无法进行查看，当然，我们可以垂直显示，这也是我们经常使用的方法：
(root@localhost) > select * from user G;
*************************** 1. row ***************************
Host: localhost
User: root
Password:
Select_priv: Y
Insert_priv: Y
Update_priv: Y
Delete_priv: Y
Create_priv: Y
Drop_priv: Y
Reload_priv: Y
Shutdown_priv: Y
Process_priv: Y
File_priv: Y
Grant_priv: Y
References_priv: Y
Index_priv: Y
Alter_priv: Y
Show_db_priv: Y
Super_priv: Y
Create_tmp_table_priv: Y
Lock_tables_priv: Y
Execute_priv: Y
Repl_slave_priv: Y
Repl_client_priv: Y
Create_view_priv: Y
Show_view_priv: Y
Create_routine_priv: Y
Alter_routine_priv: Y
Create_user_priv: Y
ssl_type:
ssl_cipher:
x509_issuer:
x509_subject:
max_questions: 0
max_updates: 0
max_connections: 0
max_user_connections: 0
*************************** 2. row ***************************
Host: localhost.localdomain
User: root
。。。。。。
但是当我们的结果记录有很多时候，这种垂直显示明显效率不高，这时候有啥好办法吗？
我们可以借助与pager工具，pager可以和操作系统的文档显示命令进行结合，来进行记录的分页显示：
(root@localhost) > pager less
PAGER set to 'less'
(root@localhost) > select * from user G;
*************************** 1. row ***************************
Host: localhost
User: root
Password:
Select_priv: Y
Insert_priv: Y
Update_priv: Y
Delete_priv: Y
Create_priv: Y
Drop_priv: Y
Reload_priv: Y
Shutdown_priv: Y
Process_priv: Y
File_priv: Y
Grant_priv: Y
References_priv: Y
Index_priv: Y
Alter_priv: Y
Show_db_priv: Y
Super_priv: Y
Create_tmp_table_priv: Y
Lock_tables_priv: Y
Execute_priv: Y
Repl_slave_priv: Y
Repl_client_priv: Y
Create_view_priv: Y
Show_view_priv: Y
Create_routine_priv: Y
Alter_routine_priv: Y
Create_user_priv: Y
ssl_type:
ssl_cipher:
x509_issuer:
x509_subject:
max_questions: 0
max_updates: 0
max_connections: 0
max_user_connections: 0
*************************** 2. row ***************************
Host: localhost.localdomain
User: root
Password:
Select_priv: Y
Insert_priv: Y
:通过less的翻页功能可以让记录上下翻页，此时我们加上less的-S功能，即显示长行功能，即可以实现我们的翻页+水平显示功能：
(root@localhost) > pager less -S
PAGER set to 'less -S'
(root@localhost) > select * from user ;
+-----------------------+------+-------------------------------------------+-------------+-------------+-------------+-------------+
|Host | User |Password | Select_priv | Insert_priv |Update_priv | Delete_priv |
+-----------------------+------+-------------------------------------------+-------------+-------------+-------------+-------------+
|localhost | root| | Y | Y | Y | Y |
| localhost.localdomain | root| | Y | Y | Y | Y |
| 127.0.0.1 | root| | Y | Y | Y | Y |
| localhost | z1| | N | N | N | N |
| localhost | z4| | N | N | N | N |
| localhost | z | | N | N | N | N |
| localhost | z3| | N | N | N | N |
| test_hostname | z1| | N | N | N | N |
| 192.168 | z1| | N | N | N | N |
| 1921168 | z1| | N | N | N | N |
| localhost | z10 | | N | N | N | N |
| % | z1| | N | N | N | N |
| % | z2 |*23AE809DDACAF96AF0FD78ED04B6A265E05AA257 | N | N |N | N |
| % | z3| | N | N | N | N |
| % | z4 |*23AE809DDACAF96AF0FD78ED04B6A265E05AA257 | Y | N |N | N |
+-----------------------+------+-------------------------------------------+-------------+-------------+-------------+-------------+
(END)
此时我们再按左右键就可以水平显示剩余字段的内容，如下：
---------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+----------
| Select_priv | Insert_priv | Update_priv | Delete_priv | Create_priv |Drop_priv | Reload_priv | Shutdown_priv | Process_p
---------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+----------
| Y | Y | Y | Y | Y |Y | Y | Y | Y
|Y | Y | Y | Y | Y |Y | Y | Y | Y
|Y | Y | Y | Y | Y |Y | Y | Y | Y
|N | N | N | N | N |N | N | N | N
|N | N | N | N | N |N | N | N | N
|N | N | N | N | N |N | N | N | N
|N | N | N | N | N |N | N | N | N
|N | N | N | N | N |N | N | N | N
|N | N | N | N | N |N | N | N | N
|N | N | N | N | N |N | N | N | N
|N | N | N | N | N |N | N | N | N
|N | N | N | N | N |N | N | N | N
E05AA257 |N | N | N | N | N |N | N | N | N
|N | N | N | N | N |N | N | N | N
E05AA257 |Y | N | N | N | N |N | N | N | N
---------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+----------
~
~这个功能在对字段比较多的表查询时将非常方便。
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