MySQL - Fast indexing
Some examples of setting up indices in MySQL are given
Setting up fast indices in MySQL SUGGESTION #1 : Standard Indexing


CREATE TABLE mytable

(

    id int not null auto_increment,

    myfield varchar(255) not null,

    primary key (id),

    key (myfield)

);

If you index like this, you can either look for the whole string or do left-oriented LIKE searches

SUGGESTION #2 : FULLTEXT Indexing


CREATE TABLE mytable

(

    id int not null auto_increment,

    myfield varchar(255) not null,

    primary key (id),

    fulltext (myfield)

);

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