事务隔离级别，执行“select@@tx_isolation；”时出现ERROR1103(HY000):Unknownsystemvariable‘tx_isolation‘

在Mysql8中&＃xff0c;tx_isolation变量已修改为transaction_isolation

同时&＃xff0c;修改事务隔离级别的操作可以修改为

SET transaction_isolation &＃61; ‘READ-UNCOMMITTED’;
或
SET SESSION transaction_isolation &＃61; ‘READ-UNCOMMITTED’;

CMD下&＃xff1a;set session transaction isolation level read uncommitted;