Question: What is the Doha, Qatar when the snatch is Total?
SQL: SELECT "Doha , Qatar" FROM "2-18547949-2" WHERE "Snatch" = 'Total';

Question: What shows for Chen Yanqing (CHN) when Doha, Qatar is —?
SQL: SELECT "Chen Yanqing ( CHN )" FROM "2-18547949-2" WHERE "Doha , Qatar" = '—';

Question: What is the Doha, Qatar when the snatch is Clean & Jerk?
SQL: SELECT "Doha , Qatar" FROM "2-18547949-2" WHERE "Snatch" = 'Clean & Jerk';