我有一个 SQL 数据库,想知道您使用什么命令来获取该数据库中的表名称列表。
更完整一点:
import MySQLdb
connection = MySQLdb.connect(
host = 'localhost',
user = 'myself',
passwd = 'mysecret') # create the connection
cursor = connection.cursor() # get the cursor
cursor.execute("USE mydatabase") # select the database
cursor.execute("SHOW TABLES") # execute 'SHOW TABLES' (but data is not returned)
现在有两个选择:
tables = cursor.fetchall() # return data from last query
或迭代光标:
for (table_name,) in cursor:
print(table_name)
显示表格
15 个字符
show tables
会有所帮助。 这是文档。
还可以通过使用下面的驱动程序执行单个查询来从特定方案获取表。
python3 -m pip install PyMySQL
import pymysql
# Connect to the database
conn = pymysql.connect(host='127.0.0.1',user='root',passwd='root',db='my_database')
# Create a Cursor object
cur = conn.cursor()
# Execute the query: To get the name of the tables from a specific database
# replace only the my_database with the name of your database
cur.execute("SELECT table_name FROM information_schema.tables WHERE table_schema = 'my_database'")
# Read and print tables
for table in [tables[0] for tables in cur.fetchall()]:
print(table)
输出:
my_table_name_1
my_table_name_2
my_table_name_3
...
my_table_name_x
这是使用
sqlalchemy
和 pandas
库的另一个答案
from sqlalchemy import create_engine
import pandas as pd
# Make connection to server
def connect(self):
# create sqlalchemy engine
engine = create_engine("mysql+pymysql://{user}:{pw}@{server}/{db}"
.format(user=self.username,
pw=self.password,
server=self.server,
db=self.database))
return engine
if _name_ == '_main_':
server = 'myserver'
database = 'mydatabase'
username = 'myusername'
password = 'mypassword'
table = 'mytable'
con = connect()
my_query = f"SHOW COLUMNS FROM {table};"
df = pd.read_sql_query(sql=my_query, con=con)