Oracle PL/SQL也提供了一系列预定义的异常( Explicitly Raising Predefined Exception),这些异常在Oracle的数据库操作中自动被抛出,例如NO_DATA_FOUND(当SELECT INTO语句未返回任何行时)或VALUE_ERROR(当尝试将值赋给变量时,该值超出了变量的允许范围)。 你可以直接在EXCEPTION部分捕获这些预定义的异常,但你不能直接RA...
In PL/SQL, a warning or error condition is called anexception. Exceptions can be internally defined (by the run-time system) or user defined. Examples of internally defined exceptions includedivision by zeroandout of memory. Some common internal exceptions have predefined names, such asZERO_DIVID...
16.What are types of exceptions in PL/SQL? Answer : There are 2 types of exceptions in PL SQL : 1.Predefined Exceptions : These exceptions are system defined exceptions. 2.User defined Exceptions: User defined exceptions are exceptions which are defined by the user in the program. 17.Give ...
Predefined Exceptions:Built-in exceptions likeNO_DATA_FOUND,TOO_MANY_ROWS, andZERO_DIVIDE. User-Defined Exceptions:Custom exceptions are declared usingEXCEPTIONand raised usingRAISE. For example, the following PL/SQL block retrieves the salary of an employee with ID 100, raises a custom exception ...
Implicitly : Predefined Oracle Server , Nonpredefined Oracle Server Explicitly : User-defined Syntax : EXCEPTION WHEN exception1 THEN WHEN exception2 THEN …… WHEN OTHERS THEN 当程序抛出异常时 , 程序不会象设想一样 , 返回到某段程序... 直接退出程序 . ...
Associating a PL/SQL Exception with a Number: Pragma EXCEPTION_INIT Defining Your Own Error Messages: Procedure RAISE_APPLICATION_ERROR Redeclaring Predefined Exceptions How PL/SQL Exceptions Are Raised Raising Exceptions with the RAISE Statement ...
Oracle rule or exceeds a system-dependent limit. Every Oracle error has a number, but exceptions must be handled by name. So, PL/SQL predefines some common Oracle errors as exceptions. For example, PL/SQL raises the predefined exception NO_DATA_FOUND if a SELECT INTO statement returns no ...
predefined exceptions: No-data-found == when no rows are returned Cursor-already-open == when a cursor is opened in advance Dup-val-On-index == for duplicate entry of index.. Storage-error == if memory is damaged Program-error == internal problem in pl/sql ...
Implicitly : Predefined Oracle Server , Nonpredefined Oracle Server Explicitly : User-defined Syntax : EXCEPTION WHEN exception1 THEN WHEN exception2 THEN …… WHEN OTHERS THEN 当程序抛出异常时 , 程序不会象设想一样 , 返回到某段程序... 直接退出程序 . ...
How to handle exceptions A list of predefined exceptions Other scripting and PL/SQL skills How to drop database objects without displaying errors How to use bind variables How to use substitution variables How to use dynamic SQL How to run a script from a command line Chapter 14 How to manag...