Question

discuss the informal design guidelines of relation schemas​

Answer 1

Explanation:

of several parts. Not every part is present in every grid; it depends on the sort of grid. Here we will look at the most important parts of a grid.

You might recognize many of these terms from document creation programs like Microsoft Word, Google Docs or Pages. The way your document looks is defined by these sections of a grid, including the margins, the header, the footer and page numbers.

Format

The format is the full area where the final design will be laid out. In print design, the format is the page and in web design the format is the browser window.

Answer 2

• Making sure that the semantics of the attributes is clear in the scheme.
• Reducing the redundant information in tuples
• Reducing the NULL values in tuples
• Disallowing the possibility of generating spurious tuples