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Referential integrity is a property of data stating that all its references are valid. In the context of relational databases , it requires that if a value of one attribute (column) of a relation (table) references a value of another attribute (either in the same or a different relation), then the referenced value must exist.
Windmill Tilter: The Story of Don Quixote is an album by trumpeter Kenny Wheeler, his first as a leader. It was recorded in March 1968 and was released in 1969 by Fontana Records. On the album, Wheeler, credited as "Ken Wheeler," is joined by the John Dankworth Orchestra. In 2010, the album was reissued by BGO Records in remastered form.
Wheeler was born in Toronto, Ontario, on 14 January 1930. Growing up in Toronto, he began playing the cornet at age 12 and became interested in jazz in his mid-teens. Wheeler spent a year studying composition at The Royal Conservatory of Music in 1950. In 1952 he moved to Britain.
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The Express Series 90 is a development of the earlier Wheeler Express designed by Ken Wheeler. It incorporates a 20% larger tail which gives it a wider center of gravity range, while also enhancing pitch and yaw stability.
Wheeler added mental health to the list of underfunded county priorities, noting that the county budget for mental health services has not been increased since 2008 and is $22 million in the hole.
An example of a data-integrity mechanism is the parent-and-child relationship of related records. If a parent record owns one or more related child records all of the referential integrity processes are handled by the database itself, which automatically ensures the accuracy and integrity of the data so that no child record can exist without a parent (also called being orphaned) and that no ...