如何从 SQL 查询中获取列名？

Question

我需要将 SQL 查询中的数据放入 Pandas 数据框中。请告诉我是否可以获取查询结果的列名？我发现在 sqlalchemy 中有一个 keys() 函数，但它对我不起作用：

import mysql.connector
import pandas as pd

mydb = mysql.connector.connect(
  host="SQLServer",
  user="sqlusr",
  password="usrpasswd",
  database="sqldb"
)

cursor = mydb.cursor()

Query="SELECT Title, Review, Rate FROM reviews;"
cursor.execute(Query)

df = pd.DataFrame(cursor.fetchall())
df.columns = cursor.keys()

AttributeError: 'CMySQLCursor' object has no attribute 'keys'

Answer 1

显示您的数据库中的列-name.your-table-名称

Answer 2

我认为你正在寻找

cnx = mysql.connector.connect(user=DB_USER, password=DB_USER_PASSWORD, host=DB_HOST, database=DB_NAME)
cursor = cnx.cursor()
query = ("SELECT `name`, `ftp_name`, `created_at`, `status` AS `status_customer` FROM `customers"
         "WHERE `status` = %(status)s")

cursor.execute(query, { 'status': 1 })

# cursor.description will give you a tuple of tuples where [0] for each is the column header.

num_fields = len(cursor.description)
field_names = [i[0] for i in cursor.description]

print(num_fields)

print(field_names)

>>> 4
>>> [u'name', u'ftp_name', 'created_at', u'status_customer']

# OR just use this cursor function:

print(cursor.column_names)

>>> (u'name', u'ftp_name', 'created_at', u'status_customer')

希望对您有所帮助！

如何从 SQL 查询中获取列名？

How to get column names from a SQL query?

mysql

sql

mysql-connector

python-3.x

pandas