python關於mysql模塊的安裝和使用

mysql模塊 環境部署: unbutu12.04 python2.7.3 mysql 5.5.40python

1.若是沒有setup_tools也須要安裝。mysql

軟件下載地址:https://pypi.python.org/pypi/setuptools/28.8.0查找相應的的軟件。sql

安裝語句: python setup.py install數據庫

2.須要安裝MySQL-python-1.2.5.zippython2.7

軟件下載地址:https://pypi.python.org/pypi/MySQL-python/1.2.5fetch

安裝語句: python setup.py buildui

python setup.py installcode

若是出現報錯:_mysql.c:29:20: fatal error: Python.h: No such file or directory對象

須要安裝: apt_get install python-devip

3.再次執行
python setup.py build

python setup.py install

4.報錯:在導入import MySQLdb時候報錯:ImportError: libmysqlclient.so.18: cannot open shared object file: No such file or directory

解決方法: ln -s /usr/local/mysql/lib/libmysqlclient.so.18 /usr/lib/libmysqlclient.so.18 (32位)

ln -s /usr/local/mysql/lib/libmysqlclient.so.18 /usr/lib64/libmysqlclient.so.18 (64位)

數據庫連接:

import MySQLdb
#方法一 不指定數據庫 
db=MySQLdb.connect(host='localhost',user='root',passwd='123456')
#方法二  指定數據庫
db=MySQLdb.connect(host='localhost',user='root',passwd='123456',db="數據庫名")
cursor=db.cursor()

#建立數據庫

cursor.execute("create database ceshi")   
print "ceshi databases created" 
db.close()             #關閉數據庫

#建立表:

db.select_db("ceshi")    #選擇數據庫
sql="""create table student (
       id int,
       name varchar(10),
      age int,
       class char(10) )"""

cursor.execute(sql)
db.close()

#表的增,刪,改

db.select_db("student")     #選擇數據庫
sql="insert into student(id,age) values (2,34)"  #插入數據
sql="update student set name='wang' where id=2 " #更新數據
sql="delete from student where id=2 "            #刪除記錄
try:
    cursor.execute(sql)
    db.commit()      #提交數據庫執行(×在對錶進行操做的時候,須要提交數據庫執行,才能成功×)
except:
    db.rollback()
db.close()

#表查找: 1.單條記錄查詢:

db.select_db('ceshi')
sql="select count(*) from student"
cursor.execute(sql)

data = cursor.fetchone()    #獲取下一個查詢結果集。結果集是一個對象
print "ten record:",data
db.close()

2.多條數據查詢:

db.select_db('ceshi')
sql="select * from student where id < '%d'" % (10)
#sql="select * from student where id = '%d'" % (10) 等價與 #sql="select * from student where id = 10"

try:
    cursor.execute(sql)
    results = cursor.fetchall()     #接收所有的返回結果行
    for row in results:
        sid = row[0]
        sname = row[1]
        sage = row[2]
        sclass = row[3]
        print "id=%d,name=%s,age=%d,class=%s" % (sid,sname,sage,sclass) 
except:
    print "error: unable to fecth data"
db.close()
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