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speed of query/can index help?
Posted by: Ray Chambers
Date: June 26, 2009 06:15PM

still fairly new to mysql so just staring to look at indexes...
to say the least i am clueless...
here is my question..



mysql> select count('syslogD.syslogD_key') from syslogD;
+------------------------------+
| count('syslogD.syslogD_key') |
+------------------------------+
| 7099286 |
+------------------------------+
1 row in set (0.00 sec)




select syslogD.sev, syslogD.msgNum, count('syslogD.sev'), syslogD.message from syslogD where day='26' group by msgNum;

i want to speed the above up.. when i join other tables it gets REALLY slow..

from wat i understand indexing will not help with things like <=> where()...

the book "the definitive guid to mysql 5" doesn't give a great deal of help in understanding what indexs provide or what i need to do to set them up..

in the example above.. if i want to add an index with full text and msgid's/numbers.. how do i even start?

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