Oracle variable
时间: 2023-09-26 09:09:34 浏览: 38
Oracle variables are named storage locations that hold a single value of a specific data type. They are used in PL/SQL program units, such as stored procedures, functions, triggers, and packages, to store and manipulate data. Variables in Oracle are declared using the variable declaration statement, which specifies the variable name, data type, and optionally, an initial value.
For example, the following statement declares a variable named "num" of type INTEGER and assigns it an initial value of 10:
```
DECLARE
num INTEGER := 10;
BEGIN
-- code that uses the variable num
END;
```
Once a variable is declared, its value can be assigned, retrieved, and manipulated using various PL/SQL statements and functions. Variables in Oracle can be of various data types, including numeric, character, date/time, Boolean, and user-defined types.