CREATE TABLE table_name_1 (network VARCHAR2, d_erp VARCHAR2, callsign VARCHAR2)

What's the network that has a callsign of XHTM and a D ERP of ?
SELECT network FROM table_name_1 WHERE d_erp = "•" AND callsign = "xhtm"
SELECT "network" FROM "table_name_1" WHERE "callsign" = "xhtm" AND "d_erp" = "•"