Which Marriage has a Became Duchess of 12 december 1666?
CREATE TABLE table_name_68 (marriage VARCHAR, became_duchess VARCHAR)
SELECT marriage FROM table_name_68 WHERE became_duchess = "12 december 1666"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_68 (marriage VARCHAR, became_duchess VARCHAR) Question: Which Marriage has a Became Duchess of 12 december 1666? [/INST] SELECT marriage FROM table_name_68 WHERE became_duchess = "12 december 1666" </s>