The NVL function has been used for replacing the NULL values using given value or another value. The maximum size for a raw present in a table is said to be 32767 bytes. Raw datatype has been used to store the values in the binary data format. Oracle is developed with the use of C language In what language Oracle has been built?.Both are different with respect to space. Varchar occupies space for NULL values and Varchar2 won’t occupy any space. Varchar is capable of storing up to 2000 bytes whereas Varchar2 stores up to 4000 bytes. What is the difference between varchar & varchar2 data types?.Learn these Oracle Interview Questions to get placements in MNC. Schema objects are manipulated and created with SQL which comprises of the following object types: Clusters, Database links, Dimensions, Indexes, Java sources, Tables, Views, Operators, Sequences, Synonyms, etc. A schema has the same name as that user and is owned by the database user. A schema is said to be a collection of the logical structures of schema objects or data.
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