In this video, I explain data query language. Query languages, often known as DQLs or Data Query Languages, are computer languages that are used to make various queries in information systems and databases. The Structured Query Language (SQL) is a well-known example. DQL statements are used to query the data contained in schema objects.

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A Data Query Language (DQL) is a subset of SQL (Structured Query Language) used to query databases and retrieve data. DQL only allows the retrieval of data, not the modification or deletion of data. The primary statement of DQL is the SELECT statement.