[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f6NDl5nUBTimT9v_ZgkLwWoOsT7sJ5Rf6-H_6Sxw2s-4":3},{"id":4,"source":5,"question":6,"options":7,"answer":11,"related":12,"type":84,"origin":85,"createTime":79},112246307,"v1","下列事务中,可以避免脏读的有",[8,9,10],"read uncommitted","read committed","repeatable read",[],[13,26,34,42,48,54,60,67,73,80],{"id":14,"source":5,"question":15,"options":16,"answer":21,"related":22,"type":23,"origin":24,"createTime":25},112243428,"关于事务,说法不正确 的是()",[17,18,19,20],"mysql中数据库引擎InnoDB支持事务","事务是不可分割的最小工作单元.要么全成功,要么全失败","MySQL事务默认是自动提交状态","事务处理可对数据处理,也包括创建数据库和表",[],[],0,null,"2023-12-09T22:38:02+08:00",{"id":27,"source":5,"question":28,"options":29,"answer":31,"related":32,"type":23,"origin":24,"createTime":33},112243429,"哪个是mysql默认的隔离级别",[9,8,10,30],"serializable",[],[],"2023-12-09T22:38:03+08:00",{"id":35,"source":5,"question":36,"options":37,"answer":38,"related":39,"type":40,"origin":24,"createTime":41},112246281,"有订单表order(id,gid,num,gdate)分别表示订单id(主键自增),商品id,购买数量,购买日期 商品包 goods(id,name,stock,price) 分别表示商品id(主键,整数),商品名,库存量,价格. 利用事务实现在用户下单后,订单表的购买数量大于商品的库存量,取消对订单的插入操作. ___________1空__________________; 开启事务 ______________order values(_______); -- 购买商品id为2,商品数量为30. ________________________________________; -- 修改 ________________",[],[],[],2,"2023-12-09T22:50:57+08:00",{"id":43,"source":5,"question":44,"options":45,"answer":46,"related":47,"type":40,"origin":24,"createTime":41},112246286,"若设置事务A隔离级别为读取未提交. 事务A 事务B 开启事务 开启事务 查看自己余额:7000 给事务A转账1000 查看自己余额:_______;(直接给出数字) rollback; 查看自己余额:_______;(直接给出数字)",[],[],[],{"id":49,"source":5,"question":50,"options":51,"answer":52,"related":53,"type":40,"origin":24,"createTime":41},112246288,"若实现下面的效果, 设置事务A隔离级别为____________. 事务A 事务B 开启事务 开启事务 查看自己余额:7000 给事务A转账1000 查看自己余额:7000 commit; 查看自己余额:8000 Commit",[],[],[],{"id":55,"source":5,"question":56,"options":57,"answer":58,"related":59,"type":40,"origin":24,"createTime":41},112246290,"若实现下面效果,设置事务A隔离级别为____________. 事务A 事务B 开启事务 开启事务 查看自己余额:7000 给事务A转账1000 查看自己余额:7000 commit; 查看自己余额:7000 Commit; 查看自己余额:8000",[],[],[],{"id":61,"source":5,"question":62,"options":63,"answer":64,"related":65,"type":66,"origin":24,"createTime":41},112246298,"脏读是指一个事务读取了另一个事务未提交的数据",[],[],[],3,{"id":68,"source":5,"question":69,"options":70,"answer":71,"related":72,"type":66,"origin":24,"createTime":41},112246302,"读取未提交 (read uncommitted) 是事务中隔离级别最低的,在该级可产生脏读,不会产生不可重复读和幻读",[],[],[],{"id":74,"source":5,"question":75,"options":76,"answer":77,"related":78,"type":66,"origin":24,"createTime":79},112246305,"repeatable read 是mysql中默认的事务隔离级别,它解决了脏读,不可重复读和幻读",[],[],[],"2023-12-09T22:50:58+08:00",{"id":4,"source":5,"question":6,"options":81,"answer":82,"related":83,"type":84,"origin":24,"createTime":79},[8,9,10],[],[],1,{"courseName":86,"courseImg":87,"workName":88,"workId":88,"count":23,"courseId":89},"数据库原理与应用（2023级","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3610f1ffbf10e2079795f5f4e434e846.jpg","","c23de67869bf8a8157fc4c0a609d6503"]