Queries that you use to retrieve data from a table or to make calculations are called select queries. With a query you can apply a filter to the table's data, so that you only get the information that you want. 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.Īs tables grow in size they can have hundreds of thousands of records, which makes it impossible for the user to pick out specific records from that table. A query is a request for data results, and for action on data.
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