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Return only a single row from duplicate rows with MySQL
To return only a single row from duplicate rows, use DISTINCT keyword −
mysql> create table DemoTable1998 ( Name varchar(20) ); Query OK, 0 rows affected (0.61 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1998 values('Robert'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1998 values('Chris'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1998 values('Robert'); Query OK, 1 row affected (0.30 sec) mysql> insert into DemoTable1998 values('David'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1998 values('Bob'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1998 values('David'); Query OK, 1 row affected (0.10 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable1998;
This will produce the following output −
+--------+ | Name | +--------+ | Robert | | Chris | | Robert | | David | | Bob | | David | +--------+ 6 rows in set (0.00 sec)
Here is the query to return only a single row from duplicates −
mysql> select distinct * from DemoTable1998;
This will produce the following output −
+--------+ | Name | +--------+ | Robert | | Chris | | David | | Bob | +--------+ 4 rows in set (0.01 sec)
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