What does pre aggregation mean?
What does pre aggregation mean?
Pre-aggregate all of the data. This means that all of the data for the variable will be aggregated and stored in the database. This is likely to result in relatively slow build performance and extremely fast user query performance.
What is aggregation define in your words?
aggregated; aggregating. Definition of aggregate (Entry 2 of 3) transitive verb. 1 : to collect or gather into a mass or whole The census data were aggregated by gender. 2 : to amount to (a whole sum or total) : total audiences aggregating several million people.
What does Egragated mean?
1 : the act or process of segregating : the state of being segregated. 2a : the separation or isolation of a race, class, or ethnic group by enforced or voluntary residence in a restricted area, by barriers to social intercourse, by separate educational facilities, or by other discriminatory means.
What are aggregate tables in data warehouse?
Aggregate tables are tables that aggregate or “roll up” the data to one level higher than a base or derived table (and other functions can also be in the aggregate tables such as average, count, min, max, and others).
Why is aggregate used in dimensional model of data warehouse Mcq?
Aggregates are used in dimensional models of the data warehouse to produce dramatic positive effects on the time it takes to query large sets of data. A more common use of aggregates is to take a dimension and change the granularity of this dimension.
Which is the best dictionary definition of aggregation?
Definition of aggregation. 1 : a group, body, or mass composed of many distinct parts or individuals A galaxy is an aggregation of stars and gas. 2a : the collecting of units or parts into a mass or whole. b : the condition of being so collected.
When was the first known use of aggregation?
The first known use of aggregation was in 1547. Kids Definition of aggregation. 1 : the collecting of units or parts into a mass or whole The formation of a blood clot begins with the aggregation of platelets.
What is the meaning of aggregation in art?
the process of combining things or amounts into a single group or total: Installation art – the aggregation of objects in a space – has long dominated the visual arts. Some animals avoid being eaten by aggregation in groups, such as schools of fish. [ U or C ]
Which is the correct way to pronounce aggregate?
aggregate. verb. ag·gre·gate | ˈa-gri-ˌgāt. How to pronounce aggregate (audio) . aggregated; aggregating. Definition of aggregate (Entry 2 of 3) transitive verb. 1 : to collect or gather into a mass or whole The census data were aggregated by gender.