Question

我正在尝试检索mysql中的所有行。

import mysql.connector,sys

user,pw, host,db = 'root','12345','127.0.0.1','CA2Database'
cnx = mysql.connector.connect(user=user, password=pw, host=host, database=db)
cursor = cnx.cursor()

try:
    print(cursor.execute('SELECT * FROM student'))
except mysql.connector.Error as err:
    print(err)
    print("Error Code:", err.errno)
    print("SQLSTATE", err.sqlstate)
    print("Message", err.msg)
finally:
    print()

输出为None。表中有数据。 https://imgur.com/a/APUuZot

Answer 1

可能您缺少一些必要的函数调用。这样做：

user,pw, host,db = 'root','12345','127.0.0.1','CA2Database'
cnx = mysql.connector.connect(user=user, password=pw, host=host, database=db)
cursor = cnx.cursor()

sql_query = 'SELECT * FROM student;'
cursor.execute(sql_query)
data = cursor.fetchall()

cnx.commit()
cursor.close()

检索数据不返回

1 个答案: