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SQL Aggregate Concatenation

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SQL Aggregate Concatenation are used to perform operation on concatenation of different records from different fields. The database provides you the solution to concatenate the different field.

SQL Aggregate Concatenation

     

SQL Aggregate Concatenation are used to perform operation on concatenation of different records from different fields. The database provides you the solution to concatenate the different field. The Syntax given below helps you to concatenate different fields in Mysql :

concat ( ): The Syntax is used to combine the result set from different fields name.

Understand with Example

The Tutorial illustrate an example from 'SQL Aggregate Concatenation'. To understand example, we create a table 'Stu' that include required fieldnames and datatypes respectively. 

 

 

Create Table Stu:

create table Stu(Id varchar(2), Name varchar(15), 
Class  varchar(10),sub_id varchar(2),marks varchar(3));

Insert data into Stu:

The insert into is used to add the records or rows to the table 'Stu'.

insert into Stu values(1,'Komal',10,1,45);
insert into Stu values(2,'Ajay',10,1,56);
insert into Stu values(3,'Rakesh',10,1,67);
insert into Stu values(4,'Santosh',10,1,67);
insert into Stu values(1,'Komal',10,2,47);
insert into Stu values(2,'Ajay',10,2,53);
insert into Stu values(3,'Rakesh',10,2,57);
insert into Stu values(4,'Santosh',10,2,67);
insert into Stu values(5,'Bhanu',10,2,67);
insert into Stu values(1,'Komal',10,3,45);
insert into Stu values(2,'Ajay',10,3,56);
insert into Stu values(3,'Rakesh',10,3,67);
insert into Stu values(4,'Santosh',10,3,67);
insert into Stu values(5,'Bhanu',10,3,67);
insert into Stu values(1,'Komal',10,4,65);
insert into Stu values(2,'Ajay',10,4,56);
insert into Stu values(3,'Rakesh',10,4,37);
insert into Stu values(4,'Santosh',10,4,67);
insert into Stu values(5,'Bhanu',10,2,67);
insert into Stu values(1,'Komal',10,5,65);
insert into Stu values(2,'Ajay',10,5,46);
insert into Stu values(3,'Rakesh',10,5,63);

Concatenate Functions:

The Query below is used to combine the records set from different fields and group by keyword is performed on the multiple columns listed in select query  from table 'Stu'.

mysql> select id, name, GROUP_CONCAT(marks order by sub_id)
    -> from stu  group by id;
+------+---------+-------------------------------------+
| id   | name    | GROUP_CONCAT(marks order by sub_id) |
+------+---------+-------------------------------------+
| 1    | Komal   | 45,47,45,65,65                      |
| 2    | Ajay    | 56,53,56,56,46                      |
| 3    | Rakesh  | 67,57,67,37,63                      |
| 4    | Santosh | 67,67,67,67                         |
| 5    | Bhanu   | 67,67,67                            |
+------+---------+-------------------------------------+
5 rows in set (0.00 sec)
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Posted on: January 23, 2009

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