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.
How do you handle exceptions in loop in PL SQL?
By putting a BEGIN-END block with an exception handler inside of a loop, you can continue executing the loop if some loop iterations raise exceptions. You can still handle an exception for a statement, then continue with the next statement. Place the statement in its own subblock with its own exception handlers.
How do you handle exceptions in PL SQL block?
PL/SQL allows you to define your own exceptions according to the need of your program. A user-defined exception must be declared and then raised explicitly, using either a RAISE statement or the procedure DBMS_STANDARD. RAISE_APPLICATION_ERROR.
How PL SQL exception handling done and why it is needed?
User-defined exceptions are declared in a package, subprogram, or within the declaration section of the PL/SQL block of code and should be assigned names. … Thus the exception handling helps to deal with the errors that are encountered during the run time execution and not while compiling the program.
How many types of exceptions are there in PL 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.
How do I catch all exceptions in PL SQL?
BEGIN SELECT VersionNumber FROM DbVersion; EXCEPTION WHEN OTHERS THEN DBMS_OUTPUT. put_line(SQLCODE); END; SQL Developer Script Output: Error starting at line 2 in command: BEGIN SELECT VersionNumber FROM DbVersion; EXCEPTION WHEN OTHERS THEN DBMS_OUTPUT.
How do you continue a loop in PL SQL?
The CONTINUE statement causes the loop to skip the remainder of its body and immediately retest its condition prior to reiterating. In other words, it forces the next iteration of the loop to take place, skipping any code in between.
What is a cursor Plsql?
A cursor contains information on a select statement and the rows of data accessed by it. … A cursor is used to referred to a program to fetch and process the rows returned by the SQL statement, one at a time. There are two types of cursors: Implicit Cursors.
What are cursor attributes in Oracle?
Every explicit cursor and cursor variable has four attributes: %FOUND , %ISOPEN %NOTFOUND , and %ROWCOUNT . When appended to the cursor or cursor variable, these attributes return useful information about the execution of a data manipulation statement.
Why PL SQL Exception handling is needed?
An exception is an error which disrupts the normal flow of program instructions. PL/SQL provides us the exception block which raises the exception thus helping the programmer to find out the fault and resolve it.
How do I handle ORA 01403 without data found?
To fix this, re-create tables from the initial controlling database. The good news is that the ORA-01403 error is highly preventable. By creating the proper exceptions, the program should now operate free of the error and remain that way until edited again.
How do you handle no data found exception in PL SQL?
When you are selecting INTO a variable and there are no records returned you should get a NO DATA FOUND error. I believe the correct way to write the above code would be to wrap the SELECT statement with it’s own BEGIN/EXCEPTION/END block.
What is procedure in PL SQL with example?
Procedure Vs. Function: Key Differences
|Used mainly to a execute certain process||Used mainly to perform some calculation|
|Cannot call in SELECT statement||A Function that contains no DML statements can be called in SELECT statement|
|Use OUT parameter to return the value||Use RETURN to return the value|
What type of exception requires a raise statement?
The RAISE statement stops normal execution of a PL/SQL block or subprogram and transfers control to an exception handler. RAISE statements can raise predefined exceptions, such as ZERO_DIVIDE or NO_DATA_FOUND , or user-defined exceptions whose names you decide.