python-centos-mysql-mysqldb

yum install MySQL-python -y
 
conn = MySQLdb.Connect(host='localhost', user='root', passwd='root', db='python',charset='utf8')
The charset should be the same as the encoding of your database. If the database is gb2312, write charset='gb2312'.
 Then, this connection object also provides support for transactional operations, standard methods
commit() commit
rollback() rollback

The method used by the cursor to execute the command:
callproc(self, procname, args): used to execute the stored procedure, the received parameters are the stored procedure name and parameter list, and the return value is the number of rows affected
execute(self, query, args): execute a single sql statement, the received parameters are the sql statement itself and the list of parameters used, and the return value is the number of rows affected
executemany(self, query, args): executes the single-shot sql statement, but repeatedly executes the parameters in the parameter list, and the return value is the number of rows affected
nextset(self): move to the next result set

The method used by cursor to receive the return value:
fetchall(self): Receive all returned result rows.
fetchmany(self, size=None): Receive size pieces and return result rows. If the value of size is greater than the number of returned result rows, cursor.arraysize pieces of data will be returned.
fetchone(self): Returns a result row.
scroll(self, value, mode='relative'): Move the pointer to a row. If mode='relative', it means to move the value bar from the current row, if mode='absolute', it means to move from the first row of the result set Move the value bar one line.
 
import MySQLdb
try:
    conn=MySQLdb.connect(host='127.0.0.1',user='root',passwd='admin',db='mysql',port=3306)
    cur=conn.cursor()
    #cur.execute('select * from user')
    cur.execute('select version()')
    data = cur.fetchone ()
    print "Databases version: %s " %  data
    cur.close()
    conn.close()
except MySQLdb.Error,e:
     print "Mysql Error %d: %s" % (e.args[0], e.args[1])
 
import MySQLdb as mdb
import sys
conn = mdb.connect(host='127.0.0.1',user='root',passwd='admin',db='game',port=3306)
with conn:

    cur = conn.cursor()
    cur.execute("Create TABLE IF NOT EXISTS \
        Writers(Id INT PRIMARY KEY AUTO_INCREMENT,NAME VARCHAR(25))")
    cur.execute("INSERT INTO Writers(Name) VALUES('Jack Luo')")
    cur.execute("INSERT INTO Writers(Name) VALUES('Kity Alice')")
    cur.execute("INSERT INTO Writers(Name) VALUES('Alex ok')")
 
import MySQLdb as mdb
import sys
conn = mdb.connect(host='127.0.0.1',user='root',passwd='admin',db='game',port=3306)
with conn:
    cur = conn.cursor()
    cur.execute("SELECT * from Writers")
    rows = cur.fetchall()
    for row in rows:
        print row
 
import MySQLdb as mdb
import sys
conn = mdb.connect(host='127.0.0.1',user='root',passwd='admin',db='game',port=3306)
with conn:
    cur = conn.cursor()
    cur.execute("SELECT * from Writers")
    numrows = int(cur.rowcount)
    for i in range(numrows):
        row = cur.fetchone()
        print row[0],row[1]


####

import MySQLdb as mdb
import sys
conn = mdb.connect(host='127.0.0.1',user='root',passwd='admin',db='game',port=3306)
with conn:
    cur = conn.cursor(mdb.cursors.DictCursor)
    cur.execute("SELECT * FROM Writers")

    rows = cur.fetchall()

    for row in rows:
        print "%s %s" % (row["Id"],row["NAME"])
import MySQLdb as mdb
import sys

conn = mdb.connect(host='127.0.0.1',user='root',passwd='admin',db='game',port=3306)
with conn:
    cur = conn.cursor()
    cur.execute("SELECT * from Writers")
    rows = cur.fetchall()
    desc = cur.description
    print 'cur.description:',desc
    print "%s %3s" % (desc[0][0],desc[1][0])
    for row in rows:
        print "%2s %3s" % row


import MySQLdb as mdb
import sys
conn = mdb.connect(host='127.0.0.1',user='root',passwd='admin',db='game',port=3306)
with conn:
    cur = conn.cursor()
    cur.execute("UPDATE Writers SET NAME=%s WHERE Id = %s",("Guy de Maupasant","4"))
    print "Number of rows updated: %d" % cur.rowcount
import MySQLdb as mdb
import sys
try:
    fin = open("logo.png")
    img = fin.read()
    fin.close()
except IOError,e:
    print "Error %d: %s" % (e.args[0],e.args[1])
    sys.exit(1)
try:
    conn = mdb.connect(host='127.0.0.1',user='root',passwd='admin',db='game',port=3306)
    cursor = conn.cursor()
    cursor.execute("INSERT INTO Images SET Data='%s'" % mdb.escape_string(img))
    conn.commit()
    cursor.close()
    conn.close()
except mdb.Error,e:
    print "Error %d:%s" % (e.args[0],e.args[1])
    sys.exit(1)


###


import MySQLdb as mdb
import sys
try:
    conn = mdb.connect(host='127.0.0.1',user='root',passwd='admin',db='game',port=3306)
    cursor = conn.cursor()
    cursor.execute("SELECT Data FROM Images LIMIT 1")
    fout = open('logo2.png','wb')
    fout.write(cursor.fetchone()[0])
    fout.close()
    cursor.close()
    conn.close()
except IOError,e:
    print "Error %d: %s" %(e.args[0],e.args[1])
    sys.exit(1)



####

import MySQLdb as mdb
import sys
try:
    conn = mdb.connect(host='127.0.0.1',user='root',passwd='admin',db='game',port=3306)
    cursor = conn.cursor()
    cursor.execte("UPDATE Writers SET Name = %s WHERE Id = %s",("JACK LUO","1"))
    cursor.execte("UPDATE Writers Set Name = %s where Id = %s ",("Alex LI",'2'))
    cursor.execte("UPDATE Writers Set Name = %s where Id = %s",("Leonid Leonov",'3'))
    conn.commit()
    cursor.close()
    conn.close()
except mdb.Error,e:
    conn.rollback()
    print "Error %d: %s" % (e.args[0],e.args[1])