Regular expression to match optional tags (sqaure brackets)… (find & replace in SQL queries, Notepad++)

Question

I am trying to construct a regular expression that will find and replace occurrences of certain SQL schema qualifications in over 100 SQL files.

The original files can contain schema qualifications that may( optionally ) have square brackets ( '[' and ']' ) or not. For example a script file may contain:

[database].[dbo].[table_name]

or

database.[dbo].[table_name]

or

database.dbo.[table_name]

and all possible combinations...

I wrote something like this:

([)?database(])?\.([)?dbo(]?)\.([?)table_name(]?)

Not really working (regex101)

Update (with solution based on answer):

Expansion based on @Toto's selected answer below, with addition of a possible table alias to match following string and provision of space prefixes and suffixes

database.dbo.table_name  tn 

(\s+)(\[)?database(\])?\.(\[)?dbo(\]?)\.(\[?)table_name(\]?)((\s+)(tn))?(\s+)?

https://regex101.com/r/Rz9MLB/7

Answer 1

You have to escape the square brackets as they are special in regex.

And the groups are superfluous, your regex becomes:

\[?database\]?\.\[?dbo\]?\.\[?table_name\]?