MySQL中常用的三种插入数据的语句: insert into表示插入数据,数据库会检查主键,如果出现重复会报错; replace into表示插入替换数据,需求表中有Primary Key,或者唯一索引,如果表中已经存在数据,则用新数据替换,如果没有数据效果则和insert into一样; insert ignore表示,如果表中如果已经存在相同的记录,则忽略当前新数据。
port=3306,database='jing_dong',user='root',password='mysql',charset='utf8')#获得Cursor对象cs1 =conn.cursor()#执行insert语句,并返回受影响的行数:添加一条数据#增加count = cs1.execute('insert into goods_cates(name) values("硬盘")')#打印受影响的行数print(count)...
sql = "insert into user(username,password) values(%s,%s)" rows = cursor.excute(sql,('jason','123')) # 修改 sql = "update user set username='jasonDSB' where id=1" rows = cursor.excute(sql) 增删改 单单执行excute并不会真正影响到数据 1. 2. 3. 4. 5. 6. 7. 8. conn = pymy...
host='127.0.0.1',# MySQL服务端的IP地址port=3306,# MySQL默认PORT地址(端口号)user='root',# 用户名password='root',# 密码 也可以简写 passwddatabase='db',# 库名称 也可以简写 dbcharset='utf8'# 字符编码 千万不要加杠utf-8) cursor = conn_obj.cursor( cursor=pymysql.cursors.DictCursor )# ...
mysql+pymysql://root:xxxx@localhost/mysql?charset=utf8')date_now=datetime.datetime.now()data={'id':[888,889],'code':[1003,1004],'value':[2000,2001],'time':[20220609,20220610],'create_time':[date_now,date_now],'update_time':[date_now,date_now]}insert_df=pd.DataFrame(data)insert...
Inserting or updating data is also done using the handler structure known as a cursor. When you use a transactional storage engine such as InnoDB (the default in MySQL 5.5 and higher), you must commit the data after a sequence of INSERT, DELETE, and UPDATE statements. This...
1、下载 MySQL for Python 地址:http://sourceforge.net/projects/mysql-python/files/mysql-python/ 我这里安装的是1.2.3版本 复制代码代码如下: wget http://sourceforge.net/projects/mysql-python/files/mysql-python/1.2.3/MySQL-python-1.2.3.tar.gz ...
mysql> update users set amount=amount-2 where id=1; -- 执行操作 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) ...
python复制代码 import mysql.connector from mysql.connector import Error def insert_data_...