How many listings under Melbourne has a distance at 15km?
CREATE TABLE table_2923917_4 (melbourne VARCHAR, distance VARCHAR)
SELECT COUNT(melbourne) FROM table_2923917_4 WHERE distance = "15km"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_2923917_4 (melbourne VARCHAR, distance VARCHAR) Question: How many listings under Melbourne has a distance at 15km? [/INST] SELECT COUNT(melbourne) FROM table_2923917_4 WHERE distance = "15km" </s>