Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_15 (joined VARCHAR, conference_championships VARCHAR, nickname VARCHAR)

### Question ###
What is the year joined with a Conference championships of 5, and a Nickname of wolfpack?

### Accurate SQL ###

SELECT joined FROM table_name_15 WHERE conference_championships = 5 AND nickname = "wolfpack"