mysql query to get unique value from one column

i have a table named locations of which i want to select and get values in such a way that it should select only distinct values from a column but select all other values .

table name: locations column names 1: country values : America, India, India, India column na开发者_StackOverflow中文版mes 2: state/Province : Newyork, Punjab, Karnataka, kerala

when i select i should get India only once and all the three states listed under India . is ther any way..??? sombody please help

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You could do this:

SELECT country, GROUP_CONCAT(state SEPARATOR ', ')
FROM locations
GROUP BY country

But this sort of thing is often best done in the presentation layer.

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You want it displayed in that order, not selected?

In this case you have to add a condition inside of your loop to check a country and print ot out only if it was changed.