Table: joel_mackenzie
Columns: name
bodyweight
snatch
clean_jerk
total_kg

Question: Who has a Snatch of 157.0?
SQL: SELECT "name" FROM joel_mackenzie WHERE "snatch" = '157.0'

Question: What is the total bodyweight of everyone that has a Snatch of 153.0?
SQL: SELECT SUM("bodyweight") FROM joel_mackenzie WHERE "snatch" = '153.0'