Selecting a specific column value in SQL

I have a column in a table with values like this:

ID    Quarter
 1    February-2009,March-2009,April-2009,

If this is the value in the first row with a primary key id of 1, and suppose 开发者_运维知识库I want to select a single month, say for example I want april, then how to query the table to get the result as 4 (since I want to get april, it is 4th month).

Thanks, Shakul.