How many locations have the callsign DXGH?
CREATE TABLE table_28794440_1 (location VARCHAR, callsign VARCHAR)
SELECT COUNT(location) FROM table_28794440_1 WHERE callsign = "DXGH"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_28794440_1 (location VARCHAR, callsign VARCHAR) Question: How many locations have the callsign DXGH? [/INST] SELECT COUNT(location) FROM table_28794440_1 WHERE callsign = "DXGH" </s>