python从Oracle读取数据生成图表

 import os import cx_Oracle import openpyxl import time import csv import xlrd from matplotlib import pyplot as plt from matplotlib import font_manager

 import os os.environ['NLS_LANG'] = 'SIMPLIFIED CHINESE_CHINA.UTF8' #字符转换，如果配置了环境变量这里可用不要 os.environ['TNS_ADMIN'] = 'D:\\Python\\instantclient_12_2' #oracle客户端，如果配置了环境变量这里可用不要 os.environ['Path'] = 'D:\\Python\\instantclient_12_2' #自己电脑oracle客户端所在位置 import cx_Oracle # 方法一：用户名、密码和监听分开写 #  conn=cx_Oracle.connect('username/password@host/orcl')  #连接数据库 # 方法二：用户名、密码和监听写在一起 conn = cx_Oracle.connect('username/password@host:1521/ORCL') # utf-8显示中文 #方法三：配置监听并连接 #  tns=cx_Oracle.makedsn('host',1521,'orcl',encoding = 'utf-8',nencoding = "UTF-8") #  conn=cx_Oracle.connect('username','password',tns) curs=conn.cur<strong style="color:transparent">来源gaodai#ma#com搞@@代~&码*网</strong>sor()     #获取cursor printHeader = True # include column headers in each table output sql="select b.name,sum（a.tot_qty） from m_retail a ,c_store b " \ "where a.c_store_id=b.id and a.billdate=20200923 group by b.name" #sql语句 x=curs.execute(sql)             #使用cursor进行各种操作 rows= x.fetchall() for row in rows: print(row)

 def export_excel(sql,fileName): rr = curs.execute(sql) rows = curs.fetchall() #获取字段名 title = [ i[0] for i in curs.description ] #创建excel表 wb = openpyxl.Workbook() ws = wb.active #插入字段名到第一行 for c in range(len(title)): ws.cell(1,c+1,value = title[c]) #写入查询数据 for r in range(len(rows)): for c in range(len(rows[r])): if rows[r][c]: #值不为空时写入，空值不写入 ws.cell(r+2,c+1,value=str(rows[r][c])) #str()防止用科学计数法写入造成信息丢失 # # #保存sql脚本 # ws1 = wb.create_sheet('sql') # ws1.cell(1,1,value=sql) # wb.save(fileName) wb.close() curs.close() if __name__ == '__main__': # 方法一：用户名、密码和监听分开写 #  conn=cx_Oracle.connect('username/password@host/orcl')  #连接数据库 # 方法二：用户名、密码和监听写在一起 conn = cx_Oracle.connect('username/password@host:1521/ORCL') # utf-8显示中文 #方法三：配置监听并连接 #  tns=cx_Oracle.makedsn('host',1521,'orcl',encoding = 'utf-8',nencoding = "UTF-8") #  conn=cx_Oracle.connect('username','password',tns) curs= conn.cursor() #打开sql文件获取sql语句 with open('零售查询.sql',encoding= 'utf-8') as sql_0:#encoding= 'utf-8' sql = sql_0.read() # sql = "select b.name as 店仓,sum（a.tot_qty） as 数量 from m_retail a ,c_store b " \ #    "where a.c_store_id=b.id and a.billdate=20201010 group by b.name" cur_date = time.strftime("%Y-%m-%d", time.localtime())#"%Y-%m-%d-%H%M%S",取值日期 wjm='零售2'+cur_date+'.xlsx' export_excel(sql,wjm) conn.close()

 # 打开文件 data = xlrd.open_workbook(wjm) cur_month = time.strftime("%m", time.localtime())#取值月份 # 查看工作表 # data.sheet_names() # print("sheets：" + str(data.sheet_names())) # 通过文件名获得工作表,获取工作表Sheet # table = data.sheet_by_name(Sheet1) table =data.sheet_by_index(0)#默认读取sheet1 cel_A1=table.cell(0,0)#取指定单元格的值 cel_B1=table.cell(0,1) col_A=table.col_values(0,1)#取指定列的值 col_B=table.col_values(1,1)# col_B = [ int(x) for x in col_B ]#文本转数字 # print(cel_A1) # print(col_B) # print("整行值：" + str(table.row_values(0))) # print("整列值：" + str(table.col_values(0,1))) # print("整列值：" + str(table.col_values(1,1))) # print(col_A)

 #设置绘图时的，中文字符显示 #my_font=font_manager.FontProperties(fname=r"C:/Windows/Fonts/simhei.ttf", size=18) plt.rcParams ['font.family']=['sans-serif'] plt.rcParams ['font.sans-serif']=['simhei' ] plt.rcParams['font.size'] = '20' plt.rcParams['xtick.labelsize']=16 plt.rcParams['ytick.labelsize']=16 #设置图形大小 plt.figure(figsize=(20,8),dpi=80) #绘制条形图 plt.bar(range(len(col_A)),col_B) #设置x轴 plt.xticks(range(len(col_A)),col_A) plt.title(cur_month+"月份销售分布") #添加标题 plt.savefig("./sig_size3.png-600")#将图形保存到工程目录 plt.show()