【简答题】专门的关系运算包括 ________ 、投影、连接、除运算等。
【单选题】在企业活动中,库存有多种类型。装运库存是指在价值链末端工厂的库房里,那些已经准备好可以随时出货的产品。在途库存又称中转库存,指尚未到达目的地,正处于运输状态或等待运输状态而储备在运输工具中的库存。 根据上述定义,下列选项属于在途库存的是: A.小张给自己网购了一件毛衣,下单两天后查知该毛衣已到某中转站 B.某高速服务区内一辆大货车满载着A.超市从B.地采购的各类毛巾
C.
某皮鞋厂的卡车里,堆满了该厂用于制造新款皮鞋的牛皮
D.
某公司在城南的自有库房中存放着给城北门店销售的玩具
【判断题】专门的关系运算包括选择、投影、连接和除运算等。
【单选题】______ is unfit for the office. A. It seems to me that B. It seems to me that he C. That seems he D. That seems to him that
B.
It seems to me that he
D.
That seems to him that
【简答题】专门的关系运算包括()、()、()、除等运算。
【判断题】专门的关系运算包括选择、投影、连接和除运算等。
【单选题】选择填空。 That glass looks nice. Please pass______. [ ]
【简答题】Now, talk about what sickens you and what bugs you in your life.(造两个句子) ---- It sickens me to see / It sickens me that .. ----It bugs me to see/It bugs me that..
【单选题】四章六节P123正在转运或等待转运的,或已装在运输工具上的存货称为( )。