When the call sign is wpib, what is lowest ERP W?
CREATE TABLE table_name_21 (erp_w INTEGER, call_sign VARCHAR)
SELECT MIN(erp_w) FROM table_name_21 WHERE call_sign = "wpib"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_21 (erp_w INTEGER, call_sign VARCHAR) Question: When the call sign is wpib, what is lowest ERP W? [/INST] SELECT MIN(erp_w) FROM table_name_21 WHERE call_sign = "wpib" </s>