Data Model contains relationships between tables that which addresses cardinality and nullability of the relationships. Developed for a specific version of a DBMS, location, data storage or technology to be used in the project. Columns should have exact datatypes, lengths assigned and default values. ...
We will be discussing Oracle indexes,types of indexes in oracle with example, and how to create index in oracle in this post. I will through light on all the options on how to create an index in oracle. I hope you will like this post. I will be looking forward tofeedback on this p...
A VIR table is a virtual table having only Special or Virtual columns. Its only property is its “size”, or cardinality, meaning the number of virtual rows it contains. It is created using the syntax: CREATETABLEname[coldef]ENGINE=CONNECTTABLE_TYPE=VIR[BLOCK_SIZE=n]; ...
18.The system of claim 17, wherein the query optimizer is adapted to compare the tree representation for the fields of the data structure and the tree representation for the data modification statement by, for each relational operator in the tree representation for the fields of the data structu...
have the same cardinality, and their elements are equal. Elements are equal depending on whether they are equal by the elements own equality definitions, except for object types which require a map method. Equality is determined in the existing order of the elements, because nested tables are un...