Some specific steps are perform by the oracle engine each time whenever user access record from the data base table. It will first search for a specific table on the hard diskRead More…
VIEW
A view is a logical entity which is created from the base table. The main purpose of creating a view is to provide security over the database table. In some cases whenRead More…
DUAL TABLE
A dual table is oracle’s in built table. It can be used for arithmetic calculations. We can retrieve data from the dual table but cannot insert the data. It has only singleRead More…
DEFAULT VALUE
Insert statement is used to insert record into the table but we have to specify each value for the column list. There are cases in which some value gets repeated for majorityRead More…
USER CONSTRAINTS
We can use describe command to view logical structure of the table. It displays table structure including column name, data type, size & not null constant. It does not provide information aboutRead More…