What is the signal power for JOAB-DTV?
CREATE TABLE table_2638104_1 (signal_power VARCHAR, callsign VARCHAR)
SELECT signal_power FROM table_2638104_1 WHERE callsign = "JOAB-DTV"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_2638104_1 (signal_power VARCHAR, callsign VARCHAR) Question: What is the signal power for JOAB-DTV? [/INST] SELECT signal_power FROM table_2638104_1 WHERE callsign = "JOAB-DTV" </s>