CREATE TABLE table_64191 ("2005/ 06" CLOB, "2006/ 07" CLOB, "2007/ 08" CLOB, "2009/ 10" CLOB, "2010/ 11" CLOB, "2011/ 12" CLOB, "2012/ 13" CLOB)

Which 2010/ 11 has a 2011/ 12 of wr?
SELECT "2010/ 11" FROM table_64191 WHERE "2011/ 12" = 'wr'
SELECT "2010/ 11" FROM "table_64191" WHERE "2011/ 12" = 'wr'