Mysql添加数据和创建视图

从头开始学习mysql，把今天的log记录一下。

mysql> show tables;
+-----------------+
| Tables_in_test1 |
+-----------------+
| hardware        |
| monitor_type    |
+-----------------+
2 rows in set

mysql> DESC monitor_type;
+---------------+-------------+------+-----+---------+-------+
| Field         | Type        | Null | Key | Default | Extra |
+---------------+-------------+------+-----+---------+-------+
| serial_number | int(11)     | YES  |     | NULL    |       |
| cpu           | varchar(40) | YES  |     | NULL    |       |
| date          | date        | YES  |     | NULL    |       |
| MEMORY        | int(11)     | YES  |     | NULL    |       |
| HARDDISK      | varchar(20) | YES  | MUL | NULL    |       |
+---------------+-------------+------+-----+---------+-------+
5 rows in set

首先建了1个数据库test1，里面有2个表，为monitor_type表设置了5个参数。
为表格赋值。

mysql> INSERT INTO monitor_type(serial_number,cpu,date,MEMORY,HARDDISK)
    -> VALUES(1,'INTEL','2018-07-05',64,'3G');

查询一下，确实有了。

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mysql> SELECT *
    -> FROM monitor_type;
+---------------+-------+------------+--------+----------+
| serial_number | cpu   | date       | MEMORY | HARDDISK |
+---------------+-------+------------+--------+----------+
|             1 | INTEL | 2018-07-05 |     64 | 3G       |
+---------------+-------+------------+--------+----------+
1 row in set

创建一个名为product的视图

mysql> CREATE VIEW product
    -> AS SELECT MEMORY,cpu
    -> FROM monitor_type;
Query OK, 0 rows affected

查询视图，确实已经存在

mysql> SELECT * 
    -> FROM product;
+--------+-------+
| MEMORY | cpu   |
+--------+-------+
|     64 | INTEL |
|     64 | AMD   |
+--------+-------+
2 rows in set

mysql> show tables;
+-----------------+
| Tables_in_test1 |
+-----------------+
| hardware        |
| monitor_type    |
| product         |
+-----------------+
3 rows in set

mysql> SHOW TABLE STATUS
    -> FROM test1 
 ;
+--------------+--------+---------+------------+------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+-------------+------------+-----------------+----------+----------------+---------+
| Name         | Engine | Version | Row_format | Rows | Avg_row_length | Data_length | Max_data_length | Index_length | Data_free | Auto_increment | Create_time         | Update_time | Check_time | Collation       | Checksum | Create_options | Comment |
+--------------+--------+---------+------------+------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+-------------+------------+-----------------+----------+----------------+---------+
| hardware     | InnoDB |      10 | Compact    |    0 |              0 |       16384 |               0 |            0 |   9437184 | NULL           | 2018-07-05 13:26:22 | NULL        | NULL       | utf8_general_ci | NULL     |                |         |
| monitor_type | InnoDB |      10 | Compact    |    2 |           8192 |       16384 |               0 |        16384 |   9437184 | NULL           | 2018-07-05 14:06:35 | NULL        | NULL       | utf8_general_ci | NULL     |                |         |
| product      | NULL   | NULL    | NULL       | NULL | NULL           | NULL        | NULL            | NULL         | NULL      | NULL           | NULL                | NULL        | NULL       | NULL            | NULL     | NULL           | VIEW    |
+--------------+--------+---------+------------+------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+-------------+------------+-----------------+----------+----------------+---------+
3 rows in set
mysql> SHOW CREATE VIEW product;
+---------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+
| View    | Create View                                                                                                                                                                        | character_set_client | collation_connection |
+---------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+
| product | CREATE ALGORITHM=UNDEFINED DEFINER=`admin`@`%` SQL SECURITY DEFINER VIEW `product` AS select `monitor_type`.`MEMORY` AS `MEMORY`,`monitor_type`.`cpu` AS `cpu` from `monitor_type` | utf8                 | utf8_general_ci      |
+---------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+
1 row in set

mysql> DESCRIBE product;
+--------+-------------+------+-----+---------+-------+
| Field  | Type        | Null | Key | Default | Extra |
+--------+-------------+------+-----+---------+-------+
| MEMORY | int(11)     | YES  |     | NULL    |       |
| cpu    | varchar(40) | YES  |     | NULL    |       |
+--------+-------------+------+-----+---------+-------+
2 rows in set

好愁啊，数据库是一项很有挑战的技术。我要从原理到实践，迅速学习。

Mysql添加数据和创建视图

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