When the network mask is  255.255.255.128 what is the lowest available subnet?
CREATE TABLE table_149426_4 (available_subnets INTEGER, network_mask VARCHAR)
SELECT MIN(available_subnets) FROM table_149426_4 WHERE network_mask = "255.255.255.128"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_149426_4 (available_subnets INTEGER, network_mask VARCHAR) Question: When the network mask is  255.255.255.128 what is the lowest available subnet? [/INST] SELECT MIN(available_subnets) FROM table_149426_4 WHERE network_mask = "255.255.255.128" </s>