What is the Serial Number of the Locomotive that Entered Service October 1989?
CREATE TABLE table_name_26 (serial_no VARCHAR, entered_service VARCHAR)
SELECT serial_no FROM table_name_26 WHERE entered_service = "october 1989"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_26 (serial_no VARCHAR, entered_service VARCHAR) Question: What is the Serial Number of the Locomotive that Entered Service October 1989? [/INST] SELECT serial_no FROM table_name_26 WHERE entered_service = "october 1989" </s>