pyrhon3与mysql:查、更、删49

import pymysql

conn = pymysql.connect(host='localhost',user='root',passwd='123456',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