Question

I have a large database with two tables: stat and total.

The example of the relation is the following:

STAT:

|   ID   |  total event |
+--------+--------------+
|   7    |  2           |
|   8    |  1           |

TOTAL:

|ID | Event        |
+---+--------------+
| 7 | "hello"      |
| 7 | "everybody"  |
| 8 | "hi"         |

This is a very simplified version; also consider that STAT table could have 500K records, and for each STAT I can have about 200 TOTAL rows.

Currently, if I run a simple SELECT query in table TOTAL the system is terribly slow.

Could anyone help me with some advice for the creation of the TOTAL table? Is it possible to say to MySQL that the id column is already sorted so that there is no reason to scan all the rows till the end where, for example, id=7?

Answer 1

You can add an index, and furthermore you can partition your table.