when the nickname halley is used, what are the date completed
CREATE TABLE table_15070195_1 (date_completed VARCHAR, nickname VARCHAR)
SELECT date_completed FROM table_15070195_1 WHERE nickname = "Halley"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_15070195_1 (date_completed VARCHAR, nickname VARCHAR) Question: when the nickname halley is used, what are the date completed [/INST] SELECT date_completed FROM table_15070195_1 WHERE nickname = "Halley" </s>