如何使用python转移mysql数据库中的全部数据

import pymysql
 
# 连接源数据库
source_conn = pymysql.connect(
    host="源数据库地址",
    user="用户名",
    password="密码",
    database="源数据库名"
)
source_cursor = source_conn.cursor()
 
# 连接目标数据库
target_conn = pymysql.connect(
    host="目标数据库地址",
    user="用户名",
    password="密码",
    database="目标数据库名"
)
target_cursor = target_conn.cursor()
 
# 查询源数据库中的所有表
source_cursor.execute("SHOW TABLES")
tables = source_cursor.fetchall()
 
for table in tables:
    table_name = table[0]
    source_cursor.execute(f"SELECT * FROM {table_name}")
    rows = source_cursor.fetchall()
 
    source_cursor.execute(f"SHOW CREATE TABLE {table_name}")
    create_table_sql = source_cursor.fetchone()[1]
 
    target_cursor.execute(f"DROP TABLE IF EXISTS {table_name}")
    target_cursor.execute(create_table_sql)
 
    for row in rows:
        placeholders = ", ".join(["%s"] * len(row))
        insert_sql = f"INSERT INTO {table_name} VALUES ({placeholders})"
        target_cursor.execute(insert_sql, row)
 
    target_conn.commit()
 
 
source_cursor.close()
source_conn.close()
target_cursor.close()
target_conn.close()

import pymysql
import csv
 
 
source_conn = pymysql.connect(
    host="源数据库地址",
    user="用户名",
    password="密码",
    database="源数据库名"
)
source_cursor = source_conn.cursor()
 
source_cursor.execute("SHOW TABLES")
tables = source_cursor.fetchall()
 
for table in tables:
    table_name = table[0]
    source_cursor.execute(f"SELECT * FROM {table_name}")
    rows = source_cursor.fetchall()
 
    columns = [desc[0] for desc in source_cursor.description]
 
    with open(f"{table_name}.csv", "w", newline="", encoding="utf-8") as file:
        writer = csv.writer(file)
        writer.writerow(columns)
        writer.writerows(rows) 
 
source_cursor.close()
source_conn.close()