Question: what are advantages and disadvantages of using a data warehouse?
Answer: PROS of Data Warehousing.
– Speedy Data Retrieving. How many times have you had a piece of information that you wanted to retrieve, but forgot where it was placed? ... 
– Error Identification & Correction. ... 
– Easy Integration. ... 
CONS of Data Warehousing.
– Time Consuming Preparation. ... 
– Difficulty in Compatibility. ... 
– Maintenance Costs.