What is the main function of the SMALLINT data type and where is it appropriate to use?

The SMALLINT data type is an integer type with a smaller range of values compared to INT. It typically occupies 2 bytes of memory and stores values approximately from -32,768 to 32,767 (for signed SMALLINT).

The main function of SMALLINT is to save memory when storing numerical data that does not require a large range of values. It is advisable to use when it is known that the values will not exceed the specified range, for example:

• User age (0–120)
• Number of items in stock, if few
• Status or category codes with a limited number of options

Using SMALLINT helps optimize memory usage and can improve performance when working with large volumes of data.