python mysql創建表

表設計

表：student

字段名	類型	是否為空	主鍵	描述
StdID	int	否	是	學生ID
StdName	varchar(100)	否		學生姓名
Gender	enum('M','F')	是		性別
Age	int	是		年齡

表：Course

字段名	類型	是否為空	主鍵	描述
CouID	int	否	是	課程ID
CName	varchar(100)	否		課程名稱
TID	int	否		老師ID

表：Score

字段名	類型	是否為空	主鍵	描述
SID	int	否	是	分數ID
StdDI	int	否		學生ID
CouID	int	否		課程ID
Grade	int	否		分數

表：teacher

字段名	類型	是否為空	主鍵	描述
TID	int	否	是	老師ID
Tname	varchar(100)	否	是	老師姓名

創建表

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# @Time   : 2017/11/22 23:04
# @Author : lijunjiang
# @File   : Creater-tables.py
import MySQLdb

# sql 語句

#創建student表
Student = '''
    create table Student(
        StdID int primary key not null,
        StdName varchar(100) not null,
        Gender enum('M','F') not null,
        Age int 
    )
'''

# 創建 Course 表
Course = '''
    create table Course(
        CouID int primary key not null,
        CName varchar(100) not null,
        TID int not null
    )
'''

# 創建 Score 表
Score= '''
    create table Score(
        SID int primary key not null,
        StdID int not null,
        CouID int not null,
        Grade int not null
    )
'''

# 創建Teacher 表
Teacher='''
    create table Teacher(
        TID int primary key not null,
        TName varchar(100) not null
    )
'''
 # 創建TMP 表

TMP='''
    set @i :=0;
    create table TMP as select (@i := @i + 1) as id from information_schema.tables limit 10;
'''

def connect_mysql():
    db_config = dict(host="11.11.11.11", port=3306, db="python", charset="utf8", user="python", passwd="python")
    try:
        cnx = MySQLdb.connect(**db_config)
    except Exception as err:
        raise err
    return cnx

if __name__ == "__main__":
    sql = "create table test(id int not null);"
    cnx = connect_mysql()  # 連接mysql
    cus = cnx.cursor()     # 創建一個游標對象    try:
    try:
        cus.execute(Student)
        cus.execute(Course)
        cus.execute(Score)
        cus.execute(Teacher)
        cus.execute(TMP)
        cus.close()
        cnx.commit()
    except Exception as err:
        cnx.rollback()
        raise err
    finally:
        cnx.close()

查看

mysql> use python;
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
mysql> show tables;
+------------------+
| Tables_in_python |
+------------------+
| Course           |
| Score            |
| Student          |
| TMP              |
| Teacher          |
+------------------+
5 rows in set (0.00 sec)

mysql> select * from Student;
Empty set (0.00 sec)

mysql> show columns from Student;
+---------+---------------+------+-----+---------+-------+
| Field   | Type          | Null | Key | Default | Extra |
+---------+---------------+------+-----+---------+-------+
| StdID   | int(11)       | NO   | PRI | NULL    |       |
| StdName | varchar(100)  | NO   |     | NULL    |       |
| Gender  | enum('M','F') | NO   |     | NULL    |       |
| Age     | int(11)       | YES  |     | NULL    |       |
+---------+---------------+------+-----+---------+-------+
4 rows in set (0.00 sec)

mysql> show columns from Course;
+-------+--------------+------+-----+---------+-------+
| Field | Type         | Null | Key | Default | Extra |
+-------+--------------+------+-----+---------+-------+
| CouID | int(11)      | NO   | PRI | NULL    |       |
| CName | varchar(100) | NO   |     | NULL    |       |
| TID   | int(11)      | NO   |     | NULL    |       |
+-------+--------------+------+-----+---------+-------+
3 rows in set (0.00 sec)

mysql> show columns from Score;
+-------+---------+------+-----+---------+-------+
| Field | Type    | Null | Key | Default | Extra |
+-------+---------+------+-----+---------+-------+
| SID   | int(11) | NO   | PRI | NULL    |       |
| StdID | int(11) | NO   |     | NULL    |       |
| CouID | int(11) | NO   |     | NULL    |       |
| Grade | int(11) | NO   |     | NULL    |       |
+-------+---------+------+-----+---------+-------+
4 rows in set (0.00 sec)

mysql> show columns from Teacher;
+-------+--------------+------+-----+---------+-------+
| Field | Type         | Null | Key | Default | Extra |
+-------+--------------+------+-----+---------+-------+
| TID   | int(11)      | NO   | PRI | NULL    |       |
| TName | varchar(100) | NO   |     | NULL    |       |
+-------+--------------+------+-----+---------+-------+
2 rows in set (0.00 sec)

mysql> show columns from TMP;
+-------+------------+------+-----+---------+-------+
| Field | Type       | Null | Key | Default | Extra |
+-------+------------+------+-----+---------+-------+
| id    | bigint(21) | YES  |     | NULL    |       |
+-------+------------+------+-----+---------+-------+
1 row in set (0.00 sec)

mysql> select * from TMP;
+------+
| id   |
+------+
|    1 |
|    2 |
|    3 |
|    4 |
|    5 |
|    6 |
|    7 |
|    8 |
|    9 |
|   10 |
+------+
10 rows in set (0.00 sec)

mysql>