Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE Templates (template_type_code VARCHAR, template_id VARCHAR); CREATE TABLE Documents (template_id VARCHAR, document_name VARCHAR)
### Question:
What is the template type code of the template used by document with the name "Data base"?
### Answer:
SELECT T1.template_type_code FROM Templates AS T1 JOIN Documents AS T2 ON T1.template_id = T2.template_id WHERE T2.document_name = "Data base"