When we use execute immediate in Oracle?

The EXECUTE IMMEDIATE statement executes a dynamic SQL statement or anonymous PL/SQL block. You can use it to issue SQL statements that cannot be represented directly in PL/SQL, or to build up statements where you do not know all the table names, WHERE clauses, and so on in advance.

How do you handle exceptions in Oracle?

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 rows. To handle other Oracle errors, you can use the OTHERS handler.

How do you handle exceptions in PL SQL?

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 do you catch exceptions 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.

Can we use execute immediate for select statement?

To execute a dynamic SELECT statement, use one of the following methods: If your program knows the data types of the SELECT statement result columns, use the EXECUTE IMMEDIATE statement with the INTO clause to execute the select. EXECUTE IMMEDIATE defines a select loop to process the retrieved rows.

What is SQLCODE in Oracle?

The function SQLCODE returns the number code of the most recent exception. For internal exceptions, SQLCODE returns the number of the associated Oracle error. The number that SQLCODE returns is negative unless the Oracle error is no data found, in which case SQLCODE returns +100 .

What is the difference between execute immediate and DBMS_SQL in Oracle?

EXECUTE IMMEDIATE is quick and easy but kind of dumb. DBMS_SQL is a little more complex but gives the developer a lot more control.