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About query

Query is just like question which required to be expressed in a formal way. In computers all the user are wants to search some data form the search engine or database that called the query. A database query can be either a select Query or an action query. A select Query is simply a data retrieval Query. An action Query can ask for additional operations on the data, such as insertion, updating, or deletion.Languages used to interact with databases are called Query languages, of which the Structured Query Language (SQL) is the well-known standard.