I'm reading through the PostgreSQL docs and didn't find examples or explanations on the syntax used there. For example on the documentation page for data types you find a table having [ (n) ] and similar. Could somebody please explain or provide examples what all of those for me crypting symbols mean?

Thanks in advance.

CodePudding user response：

The syntax is described in the Conventions page of the manual.

For instance, [(n)] means that optionally there is a numeric value in parentheses.