Final answer:
The clause to add before the SELECT statement to create a table is 'CREATE TABLE AS'. This SQL syntax allows the creation of a new table using the result set of a SELECT query.
Step-by-step explanation:
The clause that can be added before the SELECT statement to create a table is 'CREATE TABLE AS'. In SQL, if you want to create a new table using the result set of a SELECT query, you would use the CREATE TABLE AS syntax. For example, if you want to create a new table that includes all records from an existing table, you would write:
CREATE TABLE new_table_name AS SELECT * FROM existing_table_name;
This statement creates a new table called new_table_name with the same columns as existing_table_name and populates it with the records returned by the SELECT query.