????? 今天學習到表的增操作，寫個博客總結一下，PS:以下所有的凝視都是我在電腦上所有操作完畢后，再拷貝到記事本上加入的。至于在運行的時候可不能夠那樣加入凝視，就有待考證了。

選擇庫

      mysql> show databases;#查看眼下有哪些數據庫存在
+--------------------+
| Database           |
+--------------------+
| information_schema |
| ceshi_ku           |
| mysql              |
| performance_schema |
+--------------------+
4 rows in set (0.00 sec)

mysql> use ceshi_ku;#選擇該數據庫，等下用來建表，貌似選擇數據庫能夠不要"；"
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
    

建表

      mysql> create table biao
    -> (
    -> id int,
    -> name char(10),
    -> gender char(2),
    -> gongsi char(15),
    -> gongzi float
    -> );#先建立一個簡單的表，編號、名字、性別、公司、工資，建表眼下不是重點，是方便接下來的操作
Query OK, 0 rows affected (0.13 sec)

mysql> select * from biao;#查看表中的內容，眼下是空表
Empty set (0.00 sec)
    

插入數據（所有列，多行）

      mysql> insert into biao#選擇要插入哪張表
    -> (id,name,gender,gongsi,gongzi)#往哪些列里面插入內容
    -> values#接下來開始插入3條，分別用","隔開，最后一個用";"
    -> (1,'ma yun','n','tao bao',6000.5),#把要插入內容依次寫好，不可調換順序！要一一相應
    -> (2,'xiao hong','v','xin lang',5000.7),
    -> (3,'xiao ming','n','bai du',3000.4);
Query OK, 3 rows affected (0.08 sec)
Records: 3  Duplicates: 0  Warnings: 0

mysql> select * from biao;#查看表中的內容，如今會發現多了3行
+------+-----------+--------+----------+--------+
| id   | name      | gender | gongsi   | gongzi |
+------+-----------+--------+----------+--------+
|    1 | ma yun    | n      | tao bao  | 6000.5 |
|    2 | xiao hong | v      | xin lang | 5000.7 |
|    3 | xiao ming | n      | bai du   | 3000.4 |
+------+-----------+--------+----------+--------+
3 rows in set (0.01 sec)
    

插入數據（缺省列，單行）

      mysql> insert into biao#這次沒有指定往哪些列里面插入，沒指定就是往全部列插入
    -> values
    -> (4,'li si','n','sou hu',9000.2);#這次是僅僅插入一行，也能夠插入多行，僅僅需用","隔開
Query OK, 1 row affected (0.07 sec)

mysql> select * from biao;#查看表內容，會發現比上次多了一行
+------+-----------+--------+----------+--------+
| id   | name      | gender | gongsi   | gongzi |
+------+-----------+--------+----------+--------+
|    1 | ma yun    | n      | tao bao  | 6000.5 |
|    2 | xiao hong | v      | xin lang | 5000.7 |
|    3 | xiao ming | n      | bai du   | 3000.4 |
|    4 | li si     | n      | sou hu   | 9000.2 |
+------+-----------+--------+----------+--------+
4 rows in set (0.00 sec)
    

插入數據（指定列，多行）

      mysql> insert into biao
    -> (id,name,gongsi,gongzi)#這次不是往全部列插入，而是部分列
    -> values
    -> (5,'lao wang','wang yi',1000.5),#依次寫好便可，記得相應關系，
    -> (6,'xiao li','ku gou',700.1);
Query OK, 2 rows affected (0.15 sec)
Records: 2  Duplicates: 0  Warnings: 0

mysql> select * from biao;#查看表內容，這次會上次發現多了2行，可是"gender"是空的
+------+-----------+--------+----------+--------+
| id   | name      | gender | gongsi   | gongzi |
+------+-----------+--------+----------+--------+
|    1 | ma yun    | n      | tao bao  | 6000.5 |
|    2 | xiao hong | v      | xin lang | 5000.7 |
|    3 | xiao ming | n      | bai du   | 3000.4 |
|    4 | li si     | n      | sou hu   | 9000.2 |
|    5 | lao wang  | NULL   | wang yi  | 1000.5 |
|    6 | xiao li   | NULL   | ku gou   |  700.1 |
+------+-----------+--------+----------+--------+
6 rows in set (0.00 sec)