[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fIhQyOzx6mLf1j5yIT6ZiT0COmbPl01ZrNzJkuiM9ISo":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":24,"type":25},[],"2023-05-18 14:01:53",15486457,[8,9,10,11],"增量加载","全量加载","批量加载","分段加载",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},29,"73fb9ba14136bd59f644bbb08138bfe2","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff935e51b005b73cf58a97ea23d2ed2bb.png","数据清洗（ETL）","031374862c2446fca9504a58fe0e93c2","第10次 课内测试","【 】是指将目标数据表中的数据全部删除后,进行数据加载的操作",[21,26,35,45,50,57,62,67,75,80],{"answer":22,"createTime":5,"id":6,"options":23,"question":19,"source":24,"type":25},[],[8,9,10,11],"v1",0,{"answer":27,"createTime":5,"id":28,"options":29,"question":34,"source":24,"type":25},[],15486458,[30,31,32,33],"全量加载是指将目标数据表中的数据全部删除后,进行数据加载的操作","全量加载是指目标表只加载源数据表中变化的数据","全量加载比增量加载的操作要复杂很多","以上说法均错误","下列说法中,关于全量加载说法正确的是()",{"answer":36,"createTime":5,"id":37,"options":38,"question":43,"source":24,"type":44},[],15486459,[39,40,41,42],"新增","修改","源数据","删除","而增量加载是指目标表只加载源数据表中变化的数据,其中变化的数据包含【 】、【 】和【 】的数据",1,{"answer":46,"createTime":5,"id":47,"options":48,"question":49,"source":24,"type":44},[],15486460,[9,8,10,11],"数据的加载机制与数据的抽取机制相类似,数据的加载机制可以分为【 】和【 】",{"answer":51,"createTime":52,"id":53,"options":54,"question":55,"source":24,"type":56},[],"2023-05-18 15:27:12",15890024,[],"当数据迁移量过于庞大时,就不能使用INSERT语句,因为执行INSERT、UPDATE以及DELETE语句的操作都会生成【】",2,{"answer":58,"createTime":52,"id":59,"options":60,"question":61,"source":24,"type":56},[],15890025,[],"数据的预处理过程,除了包括数据抽取、数据本身的清洗与检验以及数据转换操作,还包括【】操作",{"answer":63,"createTime":52,"id":64,"options":65,"question":66,"source":24,"type":56},[],15890026,[],"增量加载是指目标表仅加载源数据表中【】和发生变化的数据",{"answer":68,"createTime":52,"id":69,"options":70,"question":73,"source":24,"type":74},[],15890027,[71,72],"正确","错误","当数据迁移量过于庞大时,需要针对数据采取全量加载操作",3,{"answer":76,"createTime":52,"id":77,"options":78,"question":79,"source":24,"type":74},[],15890028,[71,72],"通常情况下,对于几千条甚至几十万条记录的数据迁移而言,采取DML",{"answer":81,"createTime":52,"id":82,"options":83,"question":84,"source":24,"type":74},[],15890029,[71,72],"优秀的增量加载机制不但能够将业务系统中的变化数据按一定的频率准确地捕获到并加载到目标表中,同时还不会对业务系统造成太大的压力,也不会影响现有业务"]