Mysql - selecting year from a unix timestamp

Question

I am using this:

SELECT FROM_UNIXTIME(my_unix_timestamp_column, \'%Y\') AS year FROM table_name WHERE year = 2009;

but it gives me an error

Answer 1

Another alternative, avoiding repetition of a biggish function call:

SELECT year
  FROM (SELECT FROM_UNIXTIME(my_unix_timestamp_column, '%Y') AS year
          FROM table_name) AS list_of_years
 WHERE year = 2009;

You might still need to use back-quotes around the word 'year' to avoid conflicts with YEAR as a keyword. The optimizer should not need to create an intermediate table to answer this query.