Table: fa_cup_1978_79
Columns: tie_no
home_team
score
away_team
date

Question: What home team has a tie no of 20?
SQL: SELECT "home_team" FROM fa_cup_1978_79 WHERE "tie_no" = '20'

Question: What date was the score 3–3, and away team was Barnet?
SQL: SELECT "date" FROM fa_cup_1978_79 WHERE "score" = '3–3' AND "away_team" = 'barnet'

Question: What is the Tie no when Wimbledon is the home team?
SQL: SELECT "tie_no" FROM fa_cup_1978_79 WHERE "home_team" = 'wimbledon'

Question: What is the score when the Tie no is replay, and the away team is York City?
SQL: SELECT "score" FROM fa_cup_1978_79 WHERE "tie_no" = 'replay' AND "away_team" = 'york city'

Question: What is the Tie no when Chester is the away team?
SQL: SELECT "tie_no" FROM fa_cup_1978_79 WHERE "away_team" = 'chester'