Name the total number of reason for change for not filled this congress
CREATE TABLE table_225200_4 (reason_for_change VARCHAR, date_successor_seated VARCHAR)
SELECT COUNT(reason_for_change) FROM table_225200_4 WHERE date_successor_seated = "Not filled this congress"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_225200_4 (reason_for_change VARCHAR, date_successor_seated VARCHAR) Question: Name the total number of reason for change for not filled this congress [/INST] SELECT COUNT(reason_for_change) FROM table_225200_4 WHERE date_successor_seated = "Not filled this congress" </s>