CREATE TABLE "polling" (
  "party" text,
  "results_2004" text,
  "csa_5_14_09" text,
  "viavoice_5_15_09" text,
  "ifop_la_croix_5_15_09" text,
  "ipsos_5_16_09" text,
  "opinion_way_5_18_09" text,
  "csa_5_20_09" text,
  "ipsos_5_25_09" text,
  "tns_sofres_5_26_09" text,
  "opinion_way_5_28_09" text,
  "tns_sofres_5_28_09" text
);

Question: Which Ipsos 5/25/09 has a TNS-Sofres 5/28/09 of 20%?
SQL: SELECT "ipsos_5_25_09" FROM "polling" WHERE "tns_sofres_5_28_09"='20%';

Question: Which TNS-Sofres 5/26/09 has an Ipsos 5/25/09 of 1%?
SQL: SELECT "tns_sofres_5_26_09" FROM "polling" WHERE "ipsos_5_25_09"='1%';

Question: Which OpinionWay 5/18/09 has an Ipsos 5/16/09 of 11%?
SQL: SELECT "opinion_way_5_18_09" FROM "polling" WHERE "ipsos_5_16_09"='11%';

Question: Which Ipsos 5/16/09 has a TNS-Sofres 5/28/09 of 2.5%?
SQL: SELECT "ipsos_5_16_09" FROM "polling" WHERE "tns_sofres_5_28_09"='2.5%';

Question: Which Ipsos 5/16/09 has an Ifop- La Croix 5/15/09 of 26%?
SQL: SELECT "csa_5_20_09" FROM "polling" WHERE "ifop_la_croix_5_15_09"='26%';

Question: Which Viavoice 5/15/09 has a CSA 5/14/09 of 5%, and a TNS-Sofres 5/28/09 of 4.5%?
SQL: SELECT "viavoice_5_15_09" FROM "polling" WHERE "csa_5_14_09"='5%' AND "tns_sofres_5_28_09"='4.5%';