Python连接MySQL,进行数据库表变更和查询:
python mysql insert delete query:
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#!/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。
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原文链接:http://blog.csdn.net/jiyingying_up/article/details/9928905