Exception Clause

It is important to distinguish the various types of error conditions that might exist in PL/SQL. A compile time error occurs when there is a problem with PL/SQL code at the time it is saved to the database. A run time error occurs when a syntactically valid program encounters a problem during program execution. Many run time errors can be dealt with in the EXCEPTION section of a PL/SQL block. An exception handler is the special code implemented to handle a given exception.

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