What number episode had a 4.2 rating? 
CREATE TABLE table_23730973_5 (no INTEGER, rating VARCHAR)
SELECT MIN(no) FROM table_23730973_5 WHERE rating = "4.2"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_23730973_5 (no INTEGER, rating VARCHAR) Question: What number episode had a 4.2 rating?  [/INST] SELECT MIN(no) FROM table_23730973_5 WHERE rating = "4.2" </s>