Table: eccc_1996_97_3
Columns: team
tries_for
tries_against
try_diff
points_for
points_against
points_diff

Question: What is Tries Against, when Points Against is 213?
SQL: SELECT "tries_against" FROM eccc_1996_97_3 WHERE "points_against" = '213'

Question: What is Tries Against, when Tries For is 21?
SQL: SELECT "tries_against" FROM eccc_1996_97_3 WHERE "tries_for" = '21'

Question: What is Try Diff, when Points Diff is +71?
SQL: SELECT "try_diff" FROM eccc_1996_97_3 WHERE "points_diff" = '+71'

Question: What is Try Diff, when Points Against is 213?
SQL: SELECT "try_diff" FROM eccc_1996_97_3 WHERE "points_against" = '213'

Question: What is Tries Against, when Try Diff is +15?
SQL: SELECT "tries_against" FROM eccc_1996_97_3 WHERE "try_diff" = '+15'