如何插入，更新删除在python数据库中使用循环选择

Question

import MySQLdb conn=MySQLdb.connect("localhost","root","","python") 
c=conn.cursor()  
city=raw_input("Enter city name :") 
c.execute("insert into city (city_name) values (%s)",(city)) 

c.execute("select * from city") 
rows=c.fetchall() 
for row in rows: 
    print row dno=input("Enter id you want to delete :") 
c.execute("delete from city where city_id='%s'",(dno)) 

eno=input("Enter the id you want to UPDATE :") 
cityName=raw_input("Enter name you want to change :"); 
update=("update city set city_name=%s where city_id=%s") 
c.execute(update,(cityName,eno)) 

c.execute("select * from city") 
rows=c.fetchall() 
for row in rows: 
    print row 

conn.commit() 
conn.close() 
print "Data are finised" 

Answer 1

此代码将为您工作。

import MySQLdb 
conn=MySQLdb.connect("128.66.203.247","it1618a14","sumo@123","it1618a14") 
c=conn.cursor() 
# sudo apt-get install python-mysqldbstrong text 
task=1 
while(task!=0): 
    print "=============================================="; 
    print "0. Exit"; 
    print "1. Insert Data"; 
    print "2. Show Data"; 
    print "3. Delete Data"; 
    print "4. Update Data"; 
    print "=============================================="; 
    task=input("Enter your choice : "); 
    print "=============================================="; 
    if(task==1): 
     # Insert Data Into table 
     city=raw_input("Enter city name :") 
     c.execute("insert into city (city_name) values (%s)",(city)) 
     conn.commit() 
     # Select Data from Table 
     print "===========After Inserting data records are==========="; 
     c.execute("select * from city") 
     rows=c.fetchall() 
     for row in rows: 
      print row 
     print "=============================================="; 
    elif(task==2): 
     # Select Data from Table 
     print "===========All Data from table================="; 
     c.execute("select * from city") 
     rows=c.fetchall() 
     for row in rows: 
      print row 
     print "=============================================="; 
    elif(task==3): 
     # Select Data from Table 
     c.execute("select * from city") 
     rows=c.fetchall() 
     for row in rows: 
      print row 
     # Delete Data 
     print "======Check The data you want to delete==========="; 
     dno=input("Enter id you want to delete :") 
     c.execute("delete from city where city_id='%s'",(dno)) 
     conn.commit() 
     # Select Data from Table 
     c.execute("select * from city") 
     rows=c.fetchall() 
     for row in rows: 
      print row 
     print "=========After deleted Data====================="; 
    elif(task==4): 
     # Select Data from Table 
     c.execute("select * from city") 
     rows=c.fetchall() 
     for row in rows: 
      print row 
     print "=======Check The data you want to update========="; 
     # Update Data Code 
     eno=input("Enter the id you want to UPDATE :") 
     cityName=raw_input("Enter name you want to change :"); 
     update=("update city set city_name=%s where city_id=%s") 
     c.execute(update,(cityName,eno)) 
     conn.commit() 
     print "=========After updated data================"; 
     # Select Data from Table 
     c.execute("select * from city") 
     rows=c.fetchall() 
     for row in rows: 
      print row 
    elif(task>4): 
     print "Your choice is wrong!! Please Enter right choice"; 
     print ""; 
    elif(task<0): 
     print "Your choice is wrong!! Please Enter right choice"; 
     print ""; 
conn.commit() 
conn.close() 
print "You have exit the program!!!!" 
print "";