MySQL GROUP BY and CONCAT() to display distinct first and last name
Let us first create a table −
mysql> create table DemoTable
(
FirstName varchar(100),
LastName varchar(100)
);
Query OK, 0 rows affected (0.92 sec)
mysql> alter table DemoTable add index(FirstName,LastName);
Query OK, 0 rows affected (1.00 sec)
Records: 0 Duplicates: 0 Warnings: 0
Insert some records in the table using insert command −
mysql> insert into DemoTable values('Adam','Smith');
Query OK, 1 row affected (0.73 sec)
mysql> insert into DemoTable values('Adam','Smith');
Query OK, 1 row affected (1.17 sec)
mysql> insert into DemoTable values('John','Doe');
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable values('Carol','Taylor');
Query OK, 1 row affected (0.25 sec)
mysql> insert into DemoTable values('John','Doe');
Query OK, 1 row affected (0.66 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+-----------+----------+
| FirstName | LastName |
+-----------+----------+
| Adam | Smith |
| Adam | Smith |
| Carol | Taylor |
| John | Doe |
| John | Doe |
+-----------+----------+
5 rows in set (0.00 sec)
Following is the query to combine distinct First and Last Name −
mysql> select concat(FirstName,' ',LastName) as combinedName from DemoTable
group by LastName,FirstName;
This will produce the following output −
+--------------+
| combinedName |
+--------------+
| Adam Smith |
| Carol Taylor |
| John Doe |
+--------------+
3 rows in set (0.00 sec)
Published on 25-Sep-2019 14:59:59
