Question: what is the soap opera when the duration is 18 years and the character is Miley Byrne?
SQL: SELECT "Soap Opera" FROM "2-18772558-8" WHERE "Duration" = '18 years' AND "Character" = 'Miley Byrne';

Question: what is the years when the duration is 13 years and the character is Renee Phelan?
SQL: SELECT "Years" FROM "2-18772558-8" WHERE "Duration" = '13 years' AND "Character" = 'Renee Phelan';

Question: what is the years when the soap opera is Glenroe and the actor is Mick Lally?
SQL: SELECT "Years" FROM "2-18772558-8" WHERE "Soap Opera" = 'Glenroe' AND "Actor" = 'Mick Lally';

Question: who is the actor when the character is Dinny Byrne?
SQL: SELECT "Actor" FROM "2-18772558-8" WHERE "Character" = 'Dinny Byrne';

Question: what is the soap opera when the actor is Dave Duffy?
SQL: SELECT "Soap Opera" FROM "2-18772558-8" WHERE "Actor" = 'Dave Duffy';