Escape SQL Server Identifiers
You can often use the Windows PowerShell back-tick escape character (`) to escape characters that are allowed in SQL Server delimited identifiers but not Windows PowerShell path names. Some characters, however, cannot be escaped. For example, you cannot escape the colon character (:) in Windows PowerShell. Identifiers with that character must be encoded. Encoding is more reliable than escaping because encoding works for all characters.
Before You Begin
The back-tick character (`) is usually on the key in the upper left of the keyboard, under the ESC key.
This is an example of escaping a # character:
This is an example of escaping the parenthesis when specifying (local) as a computer name: