What is exception and its types in PL SQL?

What is exception and its types in PL SQL?

An exception is an error condition during a program execution. PL/SQL supports programmers to catch such conditions using EXCEPTION block in the program and an appropriate action is taken against the error condition. There are two types of exceptions − System-defined exceptions. User-defined exceptions.

What are the types of exceptions in Oracle?

There are three types of exceptions:

  • Predefined exceptions are error conditions that are defined by PL/SQL.
  • Non-predefined exceptions include any standard TimesTen errors.
  • User-defined exceptions are exceptions specific to your application.

Is Too_many_rows is a user-defined exception?

The pre-defined exception TOO_MANY_ROWS is raised when A cursor fetches value in a variable having incompatible data type. SELECT INTO statement returns more than one row.

What does PL SQL do with an unhandled exception?

If no handler is found, PL/SQL returns an unhandled exception error to the host environment. Exceptions cannot propagate across remote procedure calls done through database links. A PL/SQL block cannot catch an exception raised by a remote subprogram.

What is exception in Oracle PL SQL?

In PL/SQL, a warning or error condition is called an exception. When an error occurs, an exception is raised. That is, normal execution stops and control transfers to the exception-handling part of your PL/SQL block or subprogram. Internal exceptions are raised implicitly (automatically) by the run-time system.

How many types of exception are there in PL SQL?

Exception types There are three types of exceptions: Predefined exceptions are error conditions that are defined by PL/SQL. Non-predefined exceptions include any standard TimesTen errors. User-defined exceptions are exceptions specific to your application.

Where are exceptions used in PL SQL?

An error occurs during the program execution is called Exception in PL/SQL. PL/SQL facilitates programmers to catch such conditions using exception block in the program and an appropriate action is taken against the error condition. There are two type of exceptions: System-defined Exceptions.

What is Sqlcode and Sqlerrm in PL SQL?

SQLCODE and SQLERRM are Oracle’s built-in error reporting functions in PL/SQL. When an error occurs in PL/SQL at runtime: SQLCODE returns the number of the last encountered error. SQLERRM returns the message associated with its error-number argument.

What are types of exception in SQL?

There are three types of exceptions: Predefined exceptions are error conditions that are defined by PL/SQL. Non-predefined exceptions include any standard TimesTen errors. User-defined exceptions are exceptions specific to your application.

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