為方便廣大考生考后估分對答案，希賽網特向廣大學員和網友搜集整理了2022年數據庫系統(tǒng)工程師上午真題（71-75），供大家參考。希賽網老師也將在考后進行真題答案解析，敬請廣大考生關注。

71-75、Corporate decision makers require access to information from multiplesuch sources.Seting up queries on individual sources is both cumbersome and （71）.Moreover，the sources of data may store only current data，whereas decision makers may need access to （72） dataas well.A data warehouse is a repository （or archive）of information gathered from multiple sources，stored under a unified schema，at a （73）site.Oncegathered，the data are stored for a long time，permitting access to historical data.Thus，data warehouses provide the user with a single consolidated（74）to data，making decision-support queries easier to write.Moreover，by accessing information fordecision support from a data warehouse，the decision maker ensures that online transaction-processing systems are not（75）by the decision-supportworkdoad.

（71）

A.inefficient

B.efficient

C.easy

（72）

A.many

B.past

C.big

（73）

A.distributed

B.single

C.many

（74）

A.table

B.row

C.system

（75）

A.used

B.affected

C.supported