Nigeria competed on July2, 1999.
CREATE TABLE table_1231316_5 (date VARCHAR, nation VARCHAR)
SELECT date FROM table_1231316_5 WHERE nation = "Nigeria"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_1231316_5 (date VARCHAR, nation VARCHAR) Question: Nigeria competed on July2, 1999. [/INST] SELECT date FROM table_1231316_5 WHERE nation = "Nigeria" </s>