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A package-based cache consists of one or more variables declared at the package level,rather than in any subprogram of the…

PRIVATE TEMPORARY TABLE Oracle 18c introduced the concept of a private temporary table, a memory-based temporary table that is dropped…

GLOBAL TEMPORARY TABLE Applications often use some form of temporary data store for processes that are too complicated to complete…

Oracle database allocates logical space for all data in the database. Logical storage structures are recognized by Oracle DB and…

When base tables contain large amount of data, it is expensive and time-consuming to compute the required aggregates or to…

INDEX SCAN define how the Optimizer will traverse the index block to get the result. It is a access path…

Oracle Database Cache improves the scalability and performance of applications that access Oracle databases by caching frequently used data on…

Index Organized Tables ( IOT ) have their primary key data and non-key column data stored within the same B*Tree…

In PL/SQL,we can use both VARRAY & NESTED TABLE collection type as table column datatype. The difference between these implementation…

CONCURRENT access is accessing same data by multiple users at the same time. • SHARED lock is acquired when user…

What Is A Transaction ? Transaction is logically joining multiple SQL statements (unit of work) which we can either commit/rollback.In…