When koki mizuno is the player how man positions are there?
CREATE TABLE table_18254488_2 (position VARCHAR, player VARCHAR)
SELECT COUNT(position) FROM table_18254488_2 WHERE player = "Koki Mizuno"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_18254488_2 (position VARCHAR, player VARCHAR) Question: When koki mizuno is the player how man positions are there? [/INST] SELECT COUNT(position) FROM table_18254488_2 WHERE player = "Koki Mizuno" </s>