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_20 (rd__number INTEGER, pl_gp VARCHAR, reg_gp VARCHAR)

### Question ###
What is the largest Rd# for a PI GP greater than 0 and a Reg GP less than 62?

### Accurate SQL ###

SELECT MAX(rd__number) FROM table_name_20 WHERE pl_gp > 0 AND reg_gp < 62