一、获取MySQL数据库数据写入excel
import pymysql #导入pymysql
import xlwt #导入xlwt
#一、获取链接对象
connect = pymysql.connect(host="localhost",user="root",password="password",db="db_name",charset="utf8")
cursor = connect.cursor() #获取游标
sql = "SELECT b.sname,c.cname,a.score \
FROM score a INNER JOIN students b ON a.sno=b.sno \
INNER JOIN course c ON a.cno=c.course" #三表联查
cursor.execute(sql) #执行sql语句
all = cursor.fetchall() #查询所有
wbk = xlwt.Workbook() #创建工作簿
sheet = wbk.add_sheet("学生成绩表") #向工作簿添加工作表命名为：学生成绩表
fields = ["姓名","课程","成绩"] #写入表头数据
for i in range(len(fields)):
sheet.write(0,i,fields[i]) #第0行，第i列（表头）
#print(all)
for rows in range(len(all)):
for cols in range(len(all[rows])):
sheet.write(rows+1,cols,all[rows][cols]) #第1行，第col列写起（第0行是表头）
wbk.save("./studentResult.xls") #保存数据
print('---------------获取MySQL数据库的数据写入Excel-----------------------')
import pymysql
import xlwt
connect= pymysql.connect(host='localhost',user='root',password='password',\
db='database_name',charset='utf8')
cursor = connect.cursor() #获取游标
sql2="select *from table_name"
cursor.execute(sql2) #执行sql语句
fields=cursor.description #获取表头数据
list1=[]
for field in fields:
list1.append(field[0]) #获取表头数据存入list1
info_data=cursor.fetchall() #获取所有数据
workbook = xlwt.Workbook() #创建Excel表
sheet = workbook.add_sheet('表01') #为Excel添加表单"表01"
for i in range(len(list1)): #写入表头
sheet.write(0,i, list1[i])
for i in range(1,len(info_data)+1): #写入数据：从第二行开始写
for j in range(len(list1)):
sheet.write(i,j,info_data[i-1][j])
workbook.save('movieRank.xls')
二、查询数据
print('----------------从数据库中分页查询数据------------------')
import pymysql
connect = pymysql.connect(host="localhost",user="root",\
password="password",db="table_name",charset="utf8")
cursor = connect.cursor() #获取游标
currentPage = 1 #当前的页码
pageNum = 10 #每页显示的记录数
for page in range(1,21): #查询1-20页的数据
sql = "select * from jobs limit %d,%d" #组装sql语句
startIndex = (page-1)*pageNum #每页数据条数*(当前页-1)
cursor.execute(sql%(startIndex,pageNum))
print("************第{}页**********".format(page))
for row in cursor.fetchall():
print(row)
三、使用封装函数执行MySQL操作
import pymysql
class Connect(object): #创建Connect类，封装pymysql
def __init__(self,host,user,password,db,charset):
self.host = host
self.user = user
self.password = password
self.db = db
self.charset = charset
def getconnect(self):
connect = pymysql.connect(host = self.host, user = self.user,\
password = self.password,db = self.db,charset = self.charset)
return connect
if __name__ == '__main__':
print('这是这是测试代码')
print('-----------使用封装函数--------插入mysql数据-------------------')
#from day15_pymsql.def_mysql_01 import Connect
def insert(data):
con1 = Connect('localhost','root','password','database_name','utf8') #实例化
conn = con1.getconnect() # 获取连接
cursor = conn.cursor() # 创建游标
sql = "insert into table_name values('%s','%d','%f','%d','%f')"
cursor.execute(sql % data)
conn.commit() # 提交
print('成功插入', cursor.rowcount, '条数据')
data = ('犬之岛',617.35,0.0908,2,139),('湮灭',135.34,0.0199,9,557) # 插入的数据
insert(data)
print('-----------使用封装函数-------修改mysql数据字段类型/属性---------')
#from day15_pymsql.def_mysql_01 import Connect
def modityData():
con2 = Connect('localhost','root','password','database_name','utf8') #实例化
conn = con2.getconnect() # 获取连接
cursor = conn.cursor() # 创建游标
sql2 = "update commoditytype set stu_name='%s' where ct_id='%d'"
cursor.execute(sql2%data) #执行
conn.commit()
print('成功修改', cursor.rowcount, '条数据')
data = ('科技产品',0)
modityData()
print('---------使用封装函数---------查找mysql数据-------------------')
#from day15_pymsql.def_mysql_01 import Connect
def selectAll():
con3 = Connect('localhost','root', 'password','database_name','utf8') # 实例化
conn = con3.getconnect() # 获取连接
cursor = conn.cursor() # 创建游标
sql3 = "select * from table_name"
cursor.execute(sq3) #执行
allProduct = cursor.fetchall() #查询所有数据
for row in allProduct:
print(row)
selectAll()