1、建立一个名为student的表：CREATE TABLE student_tb
mysql> USE itcast;
Database changed
mysql> CREATE TABLE student_tb
-> (
-> id INT(20),
-> name CHAR(20),
-> age INT(2),
-> sex CHAR(4)
-> );
Query OK, 0 rows affected
2、显示创建表的全部信息：SHOW TABLES
mysql> SHOW TABLES;
+------------------+
| Tables_in_itcast |
+------------------+
| student_tb |
| tb_grade |
+------------------+
2 rows in set
3、显示创建的student的表：SHOW CREATE TABLE student_tb
mysql> SHOW CREATE TABLE student_tb;
+------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table | Create Table |
+------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| student_tb | CREATE TABLE `student_tb` (
`id` int(20) DEFAULT NULL,
`name` char(20) DEFAULT NULL,
`age` int(2) DEFAULT NULL,
`sex` char(4) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=utf8 |
+------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set
4、查看建的student表结构的详细信息： DESC student_tb
mysql> DESC student_tb;
+-------+----------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+----------+------+-----+---------+-------+
| id | int(20) | YES | | NULL | |
| name | char(20) | YES | | NULL | |
| age | int(2) | YES | | NULL | |
| sex | char(4) | YES | | NULL | |
+-------+----------+------+-----+---------+-------+
4 rows in set
5、删除student表中的student_tb_1923字段：ALTER TABLE student_tb RENAME TO student_tb_1923
mysql> ALTER TABLE student_tb RENAME TO student_tb_1923;
Query OK, 0 rows affected
mysql> SHOW TABLES;
+------------------+
| Tables_in_itcast |
+------------------+
| student_tb_1923 |
| tb_grade |
+------------------+
2 rows in set
6、删除student表中的student_id INT(20)：ALTER TABLE student_tb_1923 CHANGE id student_id
INT(20)
mysql> ALTER TABLE student_tb_1923 CHANGE id student_id
INT(20);
Query OK, 0 rows affected
Records: 0 Duplicates: 0 Warnings: 0
7、查看student表： DESC student_tb_1923
mysql> DESC student_tb_1923;
+------------+----------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+------------+----------+------+-----+---------+-------+
| student_id | int(20) | YES | | NULL | |
| name | char(20) | YES | | NULL | |
| age | int(2) | YES | | NULL | |
| sex | char(4) | YES | | NULL | |
+------------+----------+------+-----+---------+-------+
4 rows in set
8、修改表student，在name后面加上tel：ALTER TABLE student_tb_1923 ADD tel INT (11) AFTER name
mysql> ALTER TABLE student_tb_1923 ADD tel INT (11) AFTER name;
Query OK, 0 rows affected
Records: 0 Duplicates: 0 Warnings: 0
9、修改完表之后查看一下表：DESC student_tb_1923
mysql> DESC student_tb_1923;
+------------+----------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+------------+----------+------+-----+---------+-------+
| student_id | int(20) | YES | | NULL | |
| name | char(20) | YES | | NULL | |
| tel | int(11) | YES | | NULL | |
| age | int(2) | YES | | NULL | |
| sex | char(4) | YES | | NULL | |
+------------+----------+------+-----+---------+-------+
5 rows in set
10、使用删除语句将tel删除： ALTER TABLE student_tb_1923 DROP tel
mysql> ALTER TABLE student_tb_1923 DROP tel;
Query OK, 0 rows affected
Records: 0 Duplicates: 0 Warnings: 0
11、出现上面语句就表示删除成功，删除后可以查看一下表： DESC student_tb_1923
mysql> DESC student_tb_1923;
+------------+----------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+------------+----------+------+-----+---------+-------+
| student_id | int(20) | YES | | NULL | |
| name | char(20) | YES | | NULL | |
| age | int(2) | YES | | NULL | |
| sex | char(4) | YES | | NULL | |
+------------+----------+------+-----+---------+-------+
4 rows in set
以上就是用Mysql创建表，修改表名，修改字段，删除字段，查看表，添加字段等语句就如以上所列大概！