三篇文章帮你搞定怎样进行mysql数据库学习之mysql跨库查询

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import MySQLdb

# 打开数据库连接
db = MySQLdb.connect("localhost", "testuser", "test123", "TESTDB", charset='utf8' )

# 使用cursor()方法获取操作游标 
cursor = db.cursor()

# SQL 插入语句
sql = """INSERT INTO EMPLOYEE(FIRST_NAME,
 LAST_NAME, AGE, SEX, INCOME)
 VALUES ('Mac', 'Mohan', 20, 'M', 2000)"""

try:
 # 执行sql语句
 cursor.execute(sql)
 # 提交到数据库执行
 db.commit()
except:
 # Rollback in case there is any error
 db.rollback()
# 关闭数据库连接
db.close()

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import MySQLdb

# 打开数据库连接
db = MySQLdb.connect("localhost", "testuser", "test123", "TESTDB", charset='utf8' )

# 使用cursor()方法获取操作游标 
cursor = db.cursor()

# SQL 查询语句
sql = "SELECT * FROM EMPLOYEE 
 WHERE INCOME > '%d'" % (1000)
try:
 # 执行SQL语句
 cursor.execute(sql)
 # 获取所有记录列表
 results = cursor.fetchall()
 for row in results:
 fname = row[0]
 lname = row[1]
 age = row[2]
 sex = row[3]
 income = row[4]
 # 打印结果
 print "fname=%s,lname=%s,age=%d,sex=%s,income=%d" % 
 (fname, lname, age, sex, income )
except:
 print "Error: unable to fecth data"
 
关闭数据库连接
db.close()