在数据准备区中允许使用的数据结构有哪些?各有什么优缺点?
[试题]What is a logical data mapping and what does it mean to the ETL team?什么是逻辑数据映射?它对ETL项目组的作用是什么?
[试题]What are the primary goals of the data discovery phase of the data warehouse project?在数据仓库项目中,数据探索阶段的主要目的是什么?
[单选题]设串s1="Data Structures、with Java",s2="it",则子串定位函数index(s1,s2)的值为 ( )A.15B.16C.17D.18
[试题]What are the four basic Data Flow steps of an ETL process?在ETL过程中四个基本的过程分别是什么?
[单选题]A.s used in this passage, "structures" means ______.A. enduranceB. organizationC. necessary partsD. energy
[名词解释] 挡水建筑物(retaining structures)
[试题]what is IMO ?what is ISO 9000?what is ISM ?what is SMS system ?
[单选题]It is what you do rather than what you say ______matters.A. whatB. whenC. thatD. how
[试题]what do you know about “SOPEP”?what is VRP , and what is VCP ?
[试题]A. What do you mean B What about youC. I’m not sure D What a pityE. What do you think F Sounds greatG. Say, why don’t you come with us H Do you mean itJessica: I’m so excited! We have two weeks off! What are going to do?Natasha:__56__. I guess I’ll ju