What is querries?

Queries are requests made to a database in order to retrieve specific data or information. They are used to search large databases for specific data or to extract useful information from them. Queries can be written in Structured Query Language (SQL) or other database programming languages and are used to retrieve, insert, modify, or delete data entries in a database. There are different types of queries, including select queries, action queries, parameter queries, and aggregate queries. Select queries are used to retrieve specific data from tables, action queries are used to modify data, parameter queries are used to prompt the user for input, and aggregate queries are used to perform calculations on data. Efficient use of queries can help retrieve relevant data from large databases, which is helpful in decision-making and analysis.