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What Are The Uses Of Declare, From And Groupby Keywords?

Answer»

The KEYWORD declares provides the users the ABILITY to create any JS function, which can be reused with the help of select (that is when the projection is DONE)
The keyword from is used to find the source data that is to be used when any QUERY is executed.

The keyword group by is used to create an AGGREGATION query.

The keyword declares provides the users the ability to create any JS function, which can be reused with the help of select (that is when the projection is done)
The keyword from is used to find the source data that is to be used when any query is executed.

The keyword group by is used to create an aggregation query.


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