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_1 (weekly_rank___number_ VARCHAR)

### Question ###
Name the 18-49 rating for weekly rank of 30

### Accurate SQL ###

SELECT 18 AS _49__rating_share_ FROM table_name_1 WHERE weekly_rank___number_ = "30"