What's the minimal number of population served?
CREATE TABLE table_18268930_1 (population_served INTEGER)
SELECT MIN(population_served) FROM table_18268930_1
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_18268930_1 (population_served INTEGER) Question: What's the minimal number of population served? [/INST] SELECT MIN(population_served) FROM table_18268930_1 </s>