Table: computus_data
Columns: expression
y_2008
y_2009
y_2010
y_2011

Question: What is the y = 2008 when y = 2011 is a = 3?
SQL: SELECT "y_2008" FROM computus_data WHERE "y_2011" = 'a = 3'

Question: What is the y = 2011 when the expression is month = floor ((d + e + 114) / 31)?
SQL: SELECT "y_2011" FROM computus_data WHERE "expression" = 'month = floor ((d + e + 114) / 31)'

Question: What is the y = 2011 when the y = 2010  is 22 march 2010?
SQL: SELECT "y_2011" FROM computus_data WHERE "y_2010" = '22 March 2010'

Question: What is the y = 2011 when the y = 2009 is 6 april 2009?
SQL: SELECT "y_2011" FROM computus_data WHERE "y_2009" = '6 April 2009'

Question: what is the y = 2008 when the expression is easter day (julian calendar)?
SQL: SELECT "y_2008" FROM computus_data WHERE "expression" = 'Easter Day (Julian calendar)'

Question: what is  the y = 2009 when the expression is month = floor ((d + e + 114) / 31)?
SQL: SELECT "y_2009" FROM computus_data WHERE "expression" = 'month = floor ((d + e + 114) / 31)'