How many coins have a diameter of 23mm?
CREATE TABLE table_1307572_1 (reverse VARCHAR, diameter VARCHAR)
SELECT COUNT(reverse) FROM table_1307572_1 WHERE diameter = "23mm"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_1307572_1 (reverse VARCHAR, diameter VARCHAR) Question: How many coins have a diameter of 23mm? [/INST] SELECT COUNT(reverse) FROM table_1307572_1 WHERE diameter = "23mm" </s>