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_23730973_5 (rating VARCHAR, viewers__millions_ VARCHAR)

### Question ###
What was the rating for the episode that had 5.90 million viewers? 

### Accurate SQL ###

SELECT rating FROM table_23730973_5 WHERE viewers__millions_ = "5.90"