dota. Dota is a custom map for warcraft III, the most popular version being DotA Allstars, which is for Warcraft III: The Frozen Throne. DotA is a generally exciting game, with many comebacks, twists and turns.
Some of you may be familiar with relational databases other than Teradata and how those other RDBMs utilize indexes. In Teradata, an âIndexâ is a physical mechanism that is used to distribute, store, and access data rows. Indexes provide a physical access path to the data and their use can avoid unnecessary full-table scans to locate rows.
Primary key constraints perform the same thing as a unique index in the sense that a primary key constraint makes a unique index to enforce the unique values within the data column. A primary key constraint define a column or series of columns that uniquely identify a given row in a table. Defining a primary key on a table is optional and you can only define a single primary key on a table. A primary key constraint can consist of one or many columns (up to 32). Any column that is defined as a primary key column is automatically set with a NOT NULL status.