Question

I have a table with 2 column latitude and longitude.
some of data rows have exact match tandem values on 2 columns .

/* Points Table */
lat |long
2.1 |5.8
2.1 |5.6    -Set as Group
2.1 |5.6    -Set as Group
2.1 |5.6    -Set as Group
2.3 |5.2
2.4 |5.3
2.5 |5.3    -Set as Group
2.5 |5.3    -Set as Group
2.6 |5.3
2.5 |5.3

I want to set as Group tandem values of 2 columns , for example the result of my SQL Query Like :

/* Points Table */
lat |long
2.1 |5.8
2.1 |5.6    -Grouped
2.3 |5.2
2.4 |5.3
2.5 |5.3    -Grouped
2.6 |5.3
2.5 |5.3

How can i do this ?

Answer 1

Use DISTINCT keyword to remove duplicate record.

SELECT DISTINCT `lat`, `long` FROM MyTable;

Alternatively you can group them by GROUP BY clause like this:

SELECT `lat`, `long`
FROM MyTable GROUP BY `lat`, `long`;

See this SQLFiddle