Category: SQL

Interview Questions SQL

Varray is another kind of collection in PLSQL. It can be compared with a PLSQL table where the elements are identified and accessed by a subscript. The subscripts or indexes…

PL/SQL

Many times we require a number of data elements on which similar type of operation is required. For such needs PL/SQL provides an ordered group of specific data type called…

PL/SQL

Good programming practice involves organizing coding elements and reusing the existing codes for minimizing efforts and reducing project development duration. For this, grouping the procedures and functions is one of…

PL/SQL

PLSQL Function is a PLSQL block with a name and declared with FUNCTION keyword. It may accept some input arguments, and perform some activities. A function always returns a value.…

PL/SQL

PLSQL Procedure is a PLSQL block with a name and declared with PROCEDURE keyword. It may accept some input arguments, and perform some activities. A procedure does not return a…

PL/SQL

Python SQL

Triggers which are executed only once for all rows in the transaction are called Statement Level Triggers. These triggers, when fired, make changes in the affected row in one go.…

PL/SQL

PL/SQL Trigger is block of code attached to an event that may occur on a data table.   Trigger is a stored block with [Declare], Begin, End and Associated with a…

PL/SQL

There are two types of exceptions in PL/SQL Built-in Exceptions and User-Defined Exceptions. Built-in exceptions are predefined in Oracle with a exception (error code) and its details. User Defined exceptions…

PL/SQL