To select all the columns from a table named "Persons" in SQL, you would use the following syntax:
D. SELECT * FROM Persons
Option A) SELECT [all] FROM Persons - This option is incorrect because the correct syntax to select all columns is to use an asterisk (*) symbol.
Option B) SELECT All Persons - This option is incorrect because it doesn't follow the correct syntax. The keyword "All" should not be used to select all columns.
Option C) SELECT .Persons - This option is incorrect because the dot (.) operator is used to specify a column from a table, not to select all columns. The correct syntax to select all columns is to use an asterisk () symbol.
Option D) SELECT * FROM Persons - This option is correct because it uses the correct syntax to select all columns from the "Persons" table. The asterisk (*) symbol represents all columns in the table.
Therefore, the correct answer is D. SELECT * FROM Persons.