What is the total number of drivers who have cars constructed by Mercedes-Benz?
CREATE TABLE table_18893428_1 (driver VARCHAR, constructor VARCHAR)
SELECT COUNT(driver) FROM table_18893428_1 WHERE constructor = "Mercedes-Benz"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_18893428_1 (driver VARCHAR, constructor VARCHAR) Question: What is the total number of drivers who have cars constructed by Mercedes-Benz? [/INST] SELECT COUNT(driver) FROM table_18893428_1 WHERE constructor = "Mercedes-Benz" </s>