You could also target by content an update to doubly-linked list: insert before the leftmost cell value 'XYZ'; delete 3 cells to the right of the rightmost cell value 'ABC'.

You could also target by content an update to doubly-linked list: insert before the leftmost cell value 'XYZ'; delete 3 cells to the right of the rightmost cell value 'ABC'.

The rewrites for updates given in this approach take that a target for update can be any relational expression, with a view name (virtual relvar) merely standing for its defining expression in a target context.

The rewrites for updates given in this approach take it that a target for update can be any relational expression, with a view name (virtual relvar) merely standing for its defining expression in a target context.

== [[Update through views: rewrites]] ==

== [[Update through views: rewrites]] ==