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Get MySQL DISTINCT to work correctly if the records contain whitespace?
To get distinct including whitespace, you can use below syntax −
SELECT DISTINCT replace(yourColumnName,' ','') FROM yourTableName;
Let us first create a table:
mysql>create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Name varchar(20) ); Query OK, 0 rows affected (0.63 sec)
Insert some records in the table using insert command −
mysql>insert into DemoTable(Name) values('John ');
Query OK, 1 row affected (0.14 sec)
mysql>insert into DemoTable(Name) values(' John ');
Query OK, 1 row affected (0.14 sec)
mysql>insert into DemoTable(Name) values('John');
Query OK, 1 row affected (0.09 sec)
mysql>insert into DemoTable(Name) values('Sam');
Query OK, 1 row affected (0.15 sec)
mysql>insert into DemoTable(Name) values('Carol');
Query OK, 1 row affected (0.22 sec)
mysql>insert into DemoTable(Name) values(' Sam');
Query OK, 1 row affected (0.14 sec)
mysql>insert into DemoTable(Name) values('Mike ');
Query OK, 1 row affected (0.12 sec)
mysql>insert into DemoTable(Name) values('David');
Query OK, 1 row affected (0.17 sec)Following is the query to display all records from the table using select statement:
mysql>select *from DemoTable;
This will produce the following output −
+----+-----------+ | Id | Name | +----+-----------+ | 1 | John | | 2 | John | | 3 | John | | 4 | Sam | | 5 | Carol | | 6 | Sam | | 7 | Mike | | 8 | David | +----+-----------+ 8 rows in set (0.00 sec)
Here is the query to get distinct including whitespace:
mysql>SELECT DISTINCT replace(Name,' ','') FROM DemoTable;
This will produce the following output −
+----------------------+ | replace(Name,' ','') | +----------------------+ | John | | Sam | | Carol | | Mike | | David | +----------------------+ 5 rows in set (0.00 sec)
Updated on: 30-Jul-2019
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