如何使用mysql.connector傳輸結果

Question

自從uni天以來，我非常生疏地使用sql和python。

我不知道如何逐行讀取查詢結果而不是fetchall？

這裏是我目前的測試代碼：

#!/usr/bin/python 
import time 
import csv 
import mysql.connector 

start_time = time.time() 
cnx = mysql.connector.connect(user='user', password='1234', 
           host='10.0.10.100', 
           database='serverDB') 

try: 
cursor = cnx.cursor() 
cursor.execute("select * from serverDB.task") 
result = cursor.fetchall() 
with open("query.csv", "wb") as csv_file: 
    csv_writer = csv.writer(csv_file) 
    csv_writer.writerow([i[0] for i in cursor.description]) # write headers 
    csv_writer.writerows(result) 

for x, row in enumerate(result): 
    print x 
    print row 
    #print result 
finally: 
cnx.close() 
print "there are ", numrows, "rows" 
print("--- %s seconds ---" % (time.time() - start_time)) 

Answer 1

有一個叫fetchone功能。這個功能的用法如下：

connect = MySQLdb.connect(......) 
cursor = connect.cursor() 
cursor.execute('select......') 
row_count = cursor.rowcount 

for i in range(row_count): 
    line = cursor.fetchone() #you can operate each line