CREATE TABLE "winning_head_of_the_river_championship_e" (
  "crew" real,
  "open_1st_viii" text,
  "open_2nd_viii" text,
  "open_3rd_viii" text,
  "u16_1st_viii" text,
  "u16_2nd_viii" text,
  "u16_3rd_viii" text,
  "u15_1st_iv" text,
  "u15_2nd_iv" text,
  "u15_3rd_iv" text,
  "u15_4th_iv" text,
  "u15_5th_iv" text,
  "u15_6th_iv" text
);

Question: what are all the open 1st viii with u15 6th iv being bgs
SQL: SELECT "open_1st_viii" FROM "winning_head_of_the_river_championship_e" WHERE "u15_6th_iv"='BGS';

Question: what are all the u16 2nd viii with u15 3rd iv being bbc
SQL: SELECT "u16_2nd_viii" FROM "winning_head_of_the_river_championship_e" WHERE "u15_3rd_iv"='BBC';

Question: what are all the open 1st viii with u15 4th iv being gt
SQL: SELECT "open_1st_viii" FROM "winning_head_of_the_river_championship_e" WHERE "u15_4th_iv"='GT';

Question: how many crew had u15 3rd iv being bgs and u15 1st iv being acgs and open 1st viii being acgs
SQL: SELECT COUNT("crew") FROM "winning_head_of_the_river_championship_e" WHERE "u15_3rd_iv"='BGS' AND "u15_1st_iv"='ACGS' AND "open_1st_viii"='ACGS';

Question: what are all the u15 3rd iv with u15 4th iv being bbc
SQL: SELECT "u15_3rd_iv" FROM "winning_head_of_the_river_championship_e" WHERE "u15_4th_iv"='BBC';

Question: how many open 2nd viii had u15 3rd iv being gt
SQL: SELECT COUNT("open_2nd_viii") FROM "winning_head_of_the_river_championship_e" WHERE "u15_3rd_iv"='GT';