How do I add indices to MySQL tables?

Question

I\'ve got a very large MySQL table with about 150,000 rows of data. Currently, when I try and run

SELECT * FROM table WHERE id = \'1\';

the

Answer 1

You can use this syntax to add an index and control the kind of index (HASH or BTREE).

create index your_index_name on your_table_name(your_column_name) using HASH;
or
create index your_index_name on your_table_name(your_column_name) using BTREE;

You can learn about differences between BTREE and HASH indexes here: http://dev.mysql.com/doc/refman/5.5/en/index-btree-hash.html