pyrhon3与mysql:查、更、删49

 import pymysql

 conn = pymysql.connect(host='localhost',user='root',passwd='',db='jodb1',port=3307,charset='utf8')
 # 172.31.10.225

 # 查询EMPLOYEE表中salary（工资）字段大于1000的所有数据：
 cursor = conn.cursor()

 print('1---------------------------------------------------------------------')
 sql = 'select * from employee where income > 2500'
 cursor.execute(sql)
 results = cursor.fetchall()
 try:
     for row in results:
         fname = row[0]
         lname = row[1]
         age = row[2]
         sex = row[3]
         income = row[4]
         print('first_name={0},last_name={1},age={2},sex={3},income={4}'.format(fname,lname,age,sex,income))

 except:
     print('oh,there a exception!')
 conn.close()
 print('select successfully')

 print('2---------------------------------------------------------------------')

 # sql_update = 'update employee set age = 28 where sex ={0}'.format('F')
 sql2 = "update employee set age = 28 where sex = '%c'"%('M')
 try:
     cursor.execute(sql2)
     conn.commit()
 except:
     conn.rollback()
     print('Execute this statement')

 print('3---------------------------------------------------------------------')

 sql3 = "delete from employee where income = '%d'"%(3900)
 try:
     cursor.execute(sql3)
     conn.commit()
 except:
     conn.rollback()

执行其中一部分时将其他部分删除，否则会有错误