Pseudocolumns in SQL
Pseudocolumns are not really columns in a table; they just have characteristics of columns. These pseudocolumns will return values when referenced just like real table columns. However, you cannot do any other DML or DDL statements on these pseudocolumns. Pseudocolumns are primarily used to give the programmer more tools to use in his code. They [...]
Written by admin on December 18th, 2010 with comments disabled.
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