python operation database data table operation-Python Tutorial-php.cn

python operation database data table operation

巴扎黑

Release： 2017-06-23 15:13:16

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Data table:

Data type:

Three forms of help ：

Input in cmd: help The topic word you want to help, or? The topic word you want to help or \h The topic word you want to help.

##Creation of data table:

CREATE database IF NOT exists zbltest2 default character set 'utf8';USE zbltest2;CREATE TABLE IF NOT EXISTS `user`(
id SMALLINT,
username VARCHAR(20)
) ENGINE=INNODB CHARSET=UTF8;

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 1 #SELECT NOW(); 2 # SELECT * FROM student 3 -- 注释 alter 4 CREATE database IF NOT exists zbltest2 default character set 'utf8'; 5 USE zbltest2; 6 CREATE TABLE IF NOT EXISTS `user`( 7 id SMALLINT, 8 username VARCHAR(20) 9 ) ENGINE=INNODB CHARSET=UTF8;10 11 -- 新闻分类12 CREATE TABLE IF NOT EXISTS cms_cate(13 id TINYINT,14 cateName varchar(50),15 cateDesc varchar(200)16 )ENGINE=MyISAM CHARSET=UTF8;17 18 #创建新闻表19 CREATE TABLE IF NOT EXISTS cms_news(20 id INT,21 title VARCHAR(50),22 content TEXT,23 pubTime INT,24 clickNum INT,25 isTop TINYINT(1) COMMENT '0代表不置顶，1代表置顶'26 )ENGINE=INNODB CHARSET=UTF8;

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Insert:

Insert data into student through sql command:

 1 CREATE database IF NOT exists zbltest1 default character set 'utf8'; 2 USE zbltest1; 3 #下面的`student`是反引号,在数字1左边和波浪线在一个按键上,目的是为了不和sql自带关键字重合 4 CREATE TABLE IF NOT EXISTS `student`( 5 id INT, 6 `name` VARCHAR(45), 7 gender VARCHAR(45) 8 ) ENGINE=INNODB CHARSET=UTF8; 9 INSERT student values(1,'ZBL1','MAN');10 INSERT student values(2,'ZBL2','MAN');11 INSERT student values(3,'ZBL3','MAN');12 select * FROM student;

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The data structure can be seen through mysql workbench.

The following connects and controls mysql through python:

 1 import pymysql 2 try: 3 # 获取一个数据库连接，注意如果是UTF-8类型的，需要制定数据库 4     conn=pymysql.connect(host='localhost',user='root',passwd='root',db='zbltest1',port=3306,charset='utf8') 5     cur=conn.cursor()#获取一个游标 6     cur.execute("INSERT student VALUES ('4', 'zbl4', 'man')") 7     cur.execute('select * from student') 8     # data=cur.fetchall() 9     for d in cur :10 11         #注意int类型需要使用str函数转义12         print("ID: "+str(d[0])+'  名字： '+d[1]+"  性别： "+d[2])13         print("row_number:" , (cur.rownumber) )14         #print('hello')15 16     cur.close()#关闭游标17     conn.close()#释放数据库资源18 except  Exception :print("发生异常")

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To run the following python code, you need to install the pymysql module first, which can be done on the command line (i.e. cmd) Enter: pip install pymysql

Haha, finally connected. Python controls the database by passing SQL statements to the database management system through functions.

Note that python must use 3.4 and mysql must use 5.7.

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