Return a list of surnames, with each surname appearing only once? : Distinct « Select Clause « SQL / MySQL






  1. SQL / MySQL
  2. Select Clause
  3. Distinct

Return a list of surnames, with each surname appearing only once?

       
mysql>
mysql>
mysql> CREATE TABLE sales_rep(
    ->   employee_number INT,
    ->   surname VARCHAR(40),
    ->   first_name VARCHAR(30),
    ->   commission TINYINT
    -> );
Query OK, 0 rows affected (0.01 sec)

mysql>
mysql>
mysql> INSERT INTO sales_rep values(4,'Rive','Mongane',10);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO sales_rep values(5,'Smith','Mike',12);
Query OK, 1 row affected (0.00 sec)

mysql>
mysql>
mysql> SELECT DISTINCT surname FROM sales_rep ORDER BY surname;
+---------+
| surname |
+---------+
| Rive    |
| Smith   |
+---------+
2 rows in set (0.00 sec)

mysql>
mysql> drop table sales_rep;
Query OK, 0 rows affected (0.01 sec)








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