SQL statements may return any number of rows, but most host languages deal with one row at a time by declaring a cursor that presents each row at a unique isolation level.
An intent lock is at the table level for a segmented tablespace or at the tablespace level for a nonsegmented tablespace. They indicate at the table or tablespace level the kinds of locks at lower levels.
Latest Answer : how to eliminate duplicate rows from a table leaving one from the duplicates ...
This is a key concept for any relational database. Isolation level is the manner in which locks are applied and released during a transaction. For DB@ a 'repeatable read' holds all locks untile
Latest Answer : Isolation level means the extent to which the transaction isolates the data is accessed ...
They are the opposite of root pages. Leaf pages are the lowest level index pages - the pages that contain index entries and information to the corresponding table rows.
Latest Answer : Leaf pages are used in context of indexes and contain data. ...
The opposite of a leaf page; it is the highest level index page. An index can contain only the one root page; all other index pages are associated to the root.
Given a read-only application that requires consistent data for every query, which isolation levels should it use to provide the most concurrency with other applications doing updates?
Given a read-only application that requires consistent data for every query, which of the following isolation levels should it use to provide the most concurrency with other applications doing updates?
