Table: alex_davies_snooker_stats
Columns: 2004_05
2007_08
2010_11
2011_12
2012_13

Question: What shows for 2004/ 05 when 2007/ 08 shows not held, 2012/ 13 is A, 2011/ 12 of A, and a 2010/ 11 of not held?
SQL: SELECT "2004_05" FROM alex_davies_snooker_stats WHERE "2007_08" = 'not held' AND "2012_13" = 'a' AND "2011_12" = 'a' AND "2010_11" = 'not held'

Question: What shows for 2012/ 13 when the 2007/ 08 is not held, and the 2011/ 12 is non-ranking?
SQL: SELECT "2012_13" FROM alex_davies_snooker_stats WHERE "2007_08" = 'not held' AND "2011_12" = 'non-ranking'

Question: What is the 2011/ 12 when the 2010/ 11 is not held, and the 2012/ 13 is A?
SQL: SELECT "2011_12" FROM alex_davies_snooker_stats WHERE "2010_11" = 'not held' AND "2012_13" = 'a'

Question: What is the 2004/ 05 when the 2011/ 12 is non-ranking?
SQL: SELECT "2004_05" FROM alex_davies_snooker_stats WHERE "2011_12" = 'non-ranking'

Question: What is the 2012/ 13 when the 2011/ 12 is non-ranking?
SQL: SELECT "2012_13" FROM alex_davies_snooker_stats WHERE "2011_12" = 'non-ranking'

Question: What is the 2010/ 11 when the 2011/ 12 is ranking tournaments?
SQL: SELECT "2010_11" FROM alex_davies_snooker_stats WHERE "2011_12" = 'ranking tournaments'