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Oracle Tutorials - Initialize Variables with Default Values

By: FYIcenter.com

(Continued from previous topic...)

How To Initialize Variables with Default Values?

There are two ways to assign default values to variables at the time of declaration:

  • Using key word DEFAULT - Appending "DEFAULT value" to the end of declaration statements.
  • Using assignment operator - Appending ":= value" to the end of declaration statements.

The script below show you some examples of declaration statements with default values:

PROCEDURE proc_var_1 AS
  domain VARCHAR2(80) := 'fyicenter.com';
  price REAL DEFAULT 999999.99;
  is_for_sale CHAR := 'N';
BEGIN
  -- Executable statements
END;

(Continued on next topic...)

  1. Is PL/SQL Language Case Sensitive?
  2. How To Enter Comments in PL/SQL?
  3. What Are the Types of PL/SQL Code Blocks?
  4. What Is an Anonymous Block?
  5. What Is a Named Program Unit?
  6. What Is a Procedure?
  7. What Is a Function?
  8. How To Declare a Local Variable?
  9. How To Initialize Variables with Default Values?
  10. How To Assign Values to Variables?
  11. What Are the Arithmetic Operations?
  12. What Are the Numeric Comparison Operations?
  13. What Are the Logical Operations?
  14. How Many Categories of Data Types?
  15. How Many Scalar Data Types Are Supported in PL/SQL?
  16. How To Convert Character Types to Numeric Types?
  17. What Are the Execution Control Statements?
  18. How To Use "IF" Statements on Multiple Conditions?
  19. How To Use "WHILE" Loop Statements?
  20. How To Use "FOR" Loop Statements?
  21. What Is NULL in PL/SQL?
  22. How To Test NULL Values?

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