Question

There’s a table that has three fields: id, word, username

And it currently has data like this:

1 | run | thisguy
2 | run | thisguy
3 | go | thatgirl
4 | go | thatguy
5 | go | thatgirl

The ones I want is 1, 3, and 4. I don’t want 2, and 5 because they’re duplicates.
How would I take them out?

Answer 1

1. Doing on the same table :
   Create a unique index on the required fields/

2. Doing in new table :

a) Create a temporary table by selecting unique data from original table.

b) Drop original table.

c) rename temporary table to original table’s name.

 CREATE TABLE tempr SELECT id, type,name FROM myTable GROUP BY type,name;
 DROP TABLE myTable;
 ALTER TABLE tempr RENAME TO myTable ;

Also create unique index on type,name on this table to prevent future duplicates.