why is batching of aggregate by weight is preferable than batching by volume
1. special requirements for its use in SQL joins. 2. special handling required by aggregate functions and SQL grouping operators
Usually there is no use of nulls but in some case there might be some use. Like consider a case a persons address has been changed but the new address is not known. In this case it is prefer to left the field null instead of wrong address.
Statistics is a mathematical science pertaining to the collection, analysis, interpretation or explanation, and presentation of data.It also provides tools for prediction and forecasting based on data. Statistical methods can be used to summarize or describe a collection of data. To create statistical reports aggregate are used.Aggregate functions compute a single result value from a set of input values.
A data warehouse functions as a repository for all the data held by an organisation. The main functions are to reduce cost of data storage, facilitate data mining, and facilitate ability to back up data at an organisational level.
FALSE
Yes, they are aggregate functions. They are also statistical functions.
nothing
aggregate functions.
The interest rate does affect aggregate demand. As the interest rate falls, aggregate demand increases and vice-versa.
aggregate functions
Sigma
Classical Aggregate Supply function is vertical whereas the Keynesian Aggregate Supply function is positively sloped.
Aggregate functions: COUNT, SUM, MIN, MAX, AVG NOTE: It can be used only in the SELECT list and in the HAVING clause. Using it anywhere else will be incorrect; also you cannot nest aggregate functions.
The aggregate demand curve shifts to the right
Zero
Consumption, investment, government spending, net exports, and aggregate expenditures.