2.
A query is a request for data results, for
action on data, or for both.
3.
You can use a query to answer a simple
question, to perform calculations, to combine
data from different tables, or even to add,
change, or delete table data. Queries that you
use to retrieve data from a table or to make
calculations are called select queries. Queries
that add, change, or delete data are called
action queries.
4.
The Maximum Value for a Column
The Row Holding the Maximum of a Certain
Column
Maximum of Column per Group
The Rows Holding the Group-wise Maximum
of a Certain Column
Using User-Defined Variables
Using Foreign Keys
Searching on Two Keys
Calculating Visits Per Day
5.
1.)What is a query?
2-3.)Give two uses of queries.
4-5.)Give two common examples of queries.
