A query can get its data from one or more tables, from existing queries, or from a combination of the two: True.
A structured query language (SQL) can be defined as a domain-specific language that is designed and developed for the management of various data that are saved in a relational or structured database.
A query can be defined as a computational request for data (information) that are saved either in a database table, from existing queries, or from a combination of both a database table and existing queries.
In conclusion, a query can request or generate for data from one or more tables, from existing queries, or from a combination of the two.
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