What is the lowest population for the neighborhood with the color blue that commenced its construction before 1987?
CREATE TABLE table_name_20 (population INTEGER, colour VARCHAR, construction_commenced VARCHAR)
SELECT MIN(population) FROM table_name_20 WHERE colour = "blue" AND construction_commenced < 1987
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_20 (population INTEGER, colour VARCHAR, construction_commenced VARCHAR) Question: What is the lowest population for the neighborhood with the color blue that commenced its construction before 1987? [/INST] SELECT MIN(population) FROM table_name_20 WHERE colour = "blue" AND construction_commenced < 1987 </s>