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Sagot :
select pat_fname, pat_lname from patron order by lower(pat_lname), lower(pat_fname); and a query that displays the first and last name of every patron, sorted by last name and then first name.
A query can be a request for information from your database, a request for action on the information, or a request for both. A query can perform calculations, combine data from various tables, add, change, or remove data from a database in addition to providing an answer to a straightforward question. A query language known as "query by example" is used in relational databases to enable users to search for data in tables and fields by offering a straightforward user interface where the user may provide an example of the data that he or she wishes to access. Structured Query Language is what it stands for. Databases may be accessed and changed using .
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