python mysql data change and query
2013-08-12 16:33
316 查看
首先下载MySQLdb 安装
python连接mysql,进行数据库表变更和查询:
python mysql insert delete query:
之后可以在此基础上根据需要进行封装。
python连接mysql,进行数据库表变更和查询:
python mysql insert delete query:
#!/usr/bin/python import MySQLdb def doInsert(cursor,db): #insert # Prepare SQL query to INSERT a record into the database. sql = "UPDATE EMPLOYEE SET AGE = AGE+1 WHERE SEX = '%c'" %('M') try: cursor.execute(sql) db.commit() except: db.rollback() def do_query(cursor,db): sql = "SELECT * FROM EMPLOYEE \ WHERE INCOME > '%d'" % (1000) try: # Execute the SQL command cursor.execute(sql) # Fetch all the rows in a list of lists. results = cursor.fetchall() print 'resuts',cursor.rowcount for row in results: fname = row[0] lname = row[1] age = row[2] sex = row[3] income = row[4] # Now print fetched result print "fname=%s,lname=%s,age=%d,sex=%s,income=%d" % \ (fname, lname, age, sex, income ) except: print "Error: unable to fecth data" def do_delete(cursor,db): sql = 'DELETE FROM EMPLOYEE WHERE AGE > {}'.format(20) try: cursor.execute(sql) db.commit() except: db.rollback() def do_insert(cursor,db,firstname,lastname,age,sex,income): sql = "INSERT INTO EMPLOYEE(FIRST_NAME, \ LAST_NAME, AGE, SEX, INCOME) \ VALUES ('%s', '%s', '%d', '%c', '%d' )" % \ (firstname,lastname,age,sex,income) try: cursor.execute(sql) db.commit() except: db.rollback() # Open database connection # change this to your mysql account #connect(server,username,password,db_name) db = MySQLdb.connect("localhost","root","root","pydb" ) # prepare a cursor object using cursor() method cursor = db.cursor() do_query(cursor,db) doInsert(cursor,db) do_query(cursor,db) do_delete(cursor,db) do_query(cursor,db) do_insert(cursor,db,'hunter','xue',22,'M',2000) do_insert(cursor,db,'mary','yang',22,'f',5555) do_insert(cursor,db,'zhang','xue',32,'M',5000) do_insert(cursor,db,'hunter','xue',22,'M',333) do_query(cursor,db) # disconnect from server db.close()
之后可以在此基础上根据需要进行封装。
相关文章推荐
- Python and Django 001 MySQL
- python远程连接mysql以及pandas.DataFrame.to_sql写入数据库
- Pythonic Data Structures and Algorithms(Array 4)
- A Python snippet almanac for scientific computing and data visualization.
- SQL Server feature:Change Data Capture(CDC) and Change Tracking
- Pythonic Data Structures and Algorithms(Array 1)
- Linux服务器上日志报com.mysql.jdbc.PacketTooBigException: Packet for query is too large (1783 > 1024). You can change this value on the server by setting the max_allowed_packet' variable.
- Data manipulation primitives in R and Python
- Python Web-第五周-Web Services and XML(Using Python to Access Web Data)
- Pythonic Data Structures and Algorithms(Array 3)
- Machine learning and Data Mining - Association Analysis with Python
- Python数据结构与算法分析学习记录(2)——基于Problem Solving with Algorithms and Data Structures using Python的学习
- mysql 安装出错,提示“mysqld: Can't change dir to 'D:\MySQL\MySQL Server 5.7\data\'”
- Python Web-第六周-JSON and the REST Architecture(Using Python to Access Web Data)
- Python and MySQL
- Python-Day12 Python mysql and ORM
- Python数据结构与算法分析学习记录(1)——基于Problem Solving with Algorithms and Data Structures using Python的学习
- SPARK SQL - update MySql table using DataFrames and JDBC
- MySQL-python 1.2.3 for Windows and Python 2.7, 32bit and 64bit versions -(亲测可用)
- Hadoop, Python, and NoSQL lead the pack for big data jobs