autocommit 是什么 “ In InnoDB, all user activity occurs inside a transaction. If autocommit mode is enabled, each SQL statement forms a single transaction on its own. By default, MySQL starts the session for each new connection with autocommit enabled, so MySQL does a commit after each SQL statement if that statement did not return an error. If a statement returns an error, the commit or rollback...
在mysql中用户的任何一个更新操作（写操作）都被视为一个事务，set autocommit=0指事务非自动提交，自此句执行以后，每个SQL语句或者语句块所在的事务都需要显示"commit"才能提交事务。set autocommit=1指事务自动提交，当用户每执行一条更新sql语句系统都会立即保存在数据表中。1、不管autocommit 是1还是0 START TRANSACTION 后，只有当commit数据才会生效，ROLLBACK后就会回滚。 2、当autocommit 为 0 时 不管有没有S...
import pymysqlmysql_host = 192.168.0.106 port = 3306 mysql_user = root mysql_pwd = 123 encoding = utf8# 建立 连接mysql服务端conn = pymysql.connect(host=mysql_host, # mysql服务端ipport=port, # mysql端口user=mysql_user, # mysql 账号password=mysql_pwd, # mysql服务端密码db=db10, # 操作的库charset=encoding # 读取字符串编码)# 拿到游标对象 cur = conn.cursor() 游标是给mysql提交命令的接口 mysql> 把s...