importpymysql# 建立连接conn=pymysql.connect(host='localhost',port=3306,user='root',password='your_password',database='your_db',charset='utf8mb4')# 获取游标cursor=conn.cursor() 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 2、mysql-connector-python 示例 importmysql.connec...
首先,必须先和数据库建立一个传输数据的连接通道,需要用到pymysql下的connect()方法 pymysql.connect() 方法返回的是Connections类下的Connection 实例,connect() 方法传参就是在给Connection类的 _init_ 初始化不定长参数,也可以理解为 connect() 方法就是在创建新的 Connetion 对象 importpymysql#建立传输...
mysql>updateuserssetamount=amount-2whereid=1;-- 执行操作Query OK,1rowaffected (0.00sec)Rowsmatched:1Changed:1Warnings:0mysql>updateuserssetamount=amount+2whereid=2;-- 执行操作Query OK,1rowaffected (0.00sec)Rowsmatched:1Changed:1Warnings:0mysql>commit;-- 提交事务 rollback;Query OK,0rowsaffect...
By default, Connector/Python tries to connect to a MySQL server running on the local host using TCP/IP. The host argument defaults to IP address 127.0.0.1 and port to 3306. Unix sockets are supported by setting unix_socket. Named pipes on the Windows platform are not supported. Connector/...
# $ pip install databases[sqlite]# Create a database instance,and connect to it.from databasesimportDatabase database=Database('sqlite:///example.db')awaitdatabase.connect()# Create a table.query="""CREATE TABLE HighScores (id INTEGER PRIMARY KEY, name VARCHAR(100), score INTEGER)"""awai...
socket=/var/lib/mysql/mysql.sock # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid``` 通过配置文件,我们可以修改 MySQL 服务使用的端口、字符集、最大连接数、套接字队列大小、最大数据...
Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> update users set amount=amount+2 where id=2; -- 执行操作 Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> commit; -- 提交事务 rollback; ...
except mysql.connector.Error as q: print("["+datetime.datetime.now().strftime("%a %b %d, %Y %I:%M:%S %p")+"] Database Error: "+str(q)+"\nProcedure: fetch_count()") def choose(): a=input("\nDo you want to re-run the query (y/n)?") if a=='y' or a=='Y':...
import mysql.connector cnx = mysql.connector.connect(user='python', password='Passw0rd!Python', host='127.0.0.1', port='6450', database='test') cnx.autocommit = True cursor = cnx.cursor() for i in range(3): query = ("""insert into t1 values(0, @@port, ( ...
import mysql.connector # Establish connection to MySQL server mydb = mysql.connector.connect( host="localhost", user="root", password="root@123", database="employee" ) # Create a cursor object mycursor = mydb.cursor() # Execute SELECT query on employee table mycursor.execute("SELECT * ...