J
Java online analytical processing (JOLAP)A Java API for the J2EE platform that can be used for creation, storage, access and management of data in an OLAP application.
JoinA two-table operation in which the data from the two tables of a relational database is merged into one larger and more detailed so-called joined table.
Journal fileA file in which update information is stored to enable roll back and data recovery actions at a later stage. Journal files are often used to take snapshots of the status of a data warehouse at specific times. Journal files are less likely to become corrupt in a system crash than regular files.
Junk dimensionA separate dimension table to group combinations of indicators and flags with low cardinality to avoid a monster star scheme and poor performance. A junk dimension is a composite of a number of small dimensions that exist for the purpose of decoding operational codes. In a situation where there are many such small dimensions, it is possible to merge them …