Scalar Variable Declaration

Syntax

variable_declaration ::=

See "expression ::=".

Semantics

variable

Name of the variable that you are declaring.

datatype

Name of a scalar data type, including any qualifiers for size, precision, and character or byte semantics. For information about scalar data types, see Chapter 3, "PL/SQL Data Types".

NOT NULL

Imposes the NOT NULL constraint on the variable. For information about this constraint, see "NOT NULL Constraint".

expression

Value to be assigned to the variable when the declaration is elaborated. expression and variable must have compatible data types.

Examples

• Example 2-9, "Scalar Variable Declarations"

• Example 2-11, "Variable and Constant Declarations with Initial Values"

• Example 2-12, "Variable Initialized to NULL by Default"

• Example 2-13, "Variable Declaration with NOT NULL Constraint"

Related Topics

In this chapter:

• "Assignment Statement"

• "Collection Variable Declaration"

• "Constant Declaration"

• "Expression"

• "Record Variable Declaration"

• "%ROWTYPE Attribute"

• "%TYPE Attribute"

In other chapters:

• "Variable Declarations"

• Chapter 3, "PL/SQL Data Types"