About

Case sensitivity refers to the condition of being uppercase or lowercase (ie lettercase)

For example, in a Latin alphabet:

• A is the uppercase glyph
• a is the lowercase glyph.

If a language is:

• case-sensitive, it will do a difference between them
• case-insensitive, it will see no differnce.

Example

SQL for instance, is a case-insensitive language.

The following select word are equals:

• SeLEcT
• SELECT
• select

Where the terms lower and uppercase text came from