tell me the total number of decile with a roll showing 251.
CREATE TABLE table_name_90 (decile VARCHAR, roll VARCHAR)
SELECT COUNT(decile) FROM table_name_90 WHERE roll = 251
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_90 (decile VARCHAR, roll VARCHAR) Question: tell me the total number of decile with a roll showing 251. [/INST] SELECT COUNT(decile) FROM table_name_90 WHERE roll = 251 </s>