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The ON clause is used to specify name of the fieldname on which index is created.



The ON clause  is used to specify  name of the fieldname on which index is created.

Understand with Example

The Tutorial illustrate an example from table 'SQL ON'. To understand and grasp the example we create a table 'Stu' that has the required fieldnames and datatypes respectively.





Create Table Stu:

Create table stu(id int, name varchar(10));

Create Index:

The Create Index keyword creates a index 'index_on_id' on table 'stu' field 'id'.

mysql> CREATE INDEX index_on_id ON stu (id);
Query OK, 3 rows affected (0.06 sec)
Records: 3  Duplicates: 0  Warnings: 0

Insert values into stu:

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

insert into stu values (1,'komal');
insert into stu values (2,'ajay');
insert into stu values (3,'santosh');

Stu Table:

The select keyword return the results of record details from table 'stu'.

mysql> select * from stu;
| id   | name    |
| 1    | komal   |
| 2    | ajay    |
| 3    | santosh |
3 rows in set (0.00 sec)

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Posted on: January 23, 2009

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