Question: What's the Ri Song-Hui when the Olympic record is the world record and Snatch was Snatch?
SQL: SELECT "Ri Song-Hui ( PRK )" FROM "2-18547439-2" WHERE "World record" = 'Olympic record' AND "Snatch" = 'Snatch';

Question: What's the 102kg when the Ri Song-Hui was 226kg?
SQL: SELECT "102kg" FROM "2-18547439-2" WHERE "Ri Song-Hui ( PRK )" = '226kg';

Question: What's the 102kg when the Snatch was Snatch and the Olympic record was the world record?
SQL: SELECT "102kg" FROM "2-18547439-2" WHERE "World record" = 'Olympic record' AND "Snatch" = 'Snatch';