Re: Do we need an index to implement a Table

Thanks Dave,

I understood ;-)

On Wed, Mar 9, 2011 at 12:43 AM, Dave Shield <[email protected]>wrote:

> On 8 March 2011 22:33, anant garg <[email protected]> wrote:
> > Is it necessary to have an index into the table
>
> Yes.
>
> > or you can have table without index.
>
> No.
>
>
> Just think about what you are asking for a moment.
> The whole point of a table, is that it can contain several
> versions of the same information - represented as
> distinct rows in the table.
>
> You need some way to distinguish one row from another.
> Which is the point of the index value(s).   If you don't have
> some form of indexing,  how are you going to tell the
> difference between the different rows?
>
> A table *MUST* have some form of index.
> The way that you represent this (single integer, a string,
> multiple indexes) is up to you - but you need *some*
> way of referring to a particular row.
>
> Dave
>

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