Table: big_tymers_discography
Columns: year
u_s
u_s_r_b
u_s_rap
album

Question: What is the U.S. rap ranking in 2000 of the U.S. 105 single?
SQL: SELECT "u_s_rap" FROM big_tymers_discography WHERE "year" = 2000 AND "u_s" = '105'

Question: What is the U.S. rap rank for the song with a U.S. R&B 23 rank?
SQL: SELECT "u_s_rap" FROM big_tymers_discography WHERE "u_s_r_b" = '23'

Question: What is the U.S. R&B rank in 2003?
SQL: SELECT "u_s_r_b" FROM big_tymers_discography WHERE "year" = 2003