Showing posts with label optimize. Show all posts
Showing posts with label optimize. Show all posts

Monday, October 31, 2011

optimize mysql with index

if you want to join large table, indexing may help.

table1: 30,000 rows
table2: 40 rows

indexing for example user ID may speed up select query

SELECT name, phoneNo, address FROM table1 INNER JOIN table2 ON table1.userid = table2.userid

with no index, query takes about 8second
but with index query only 0.4second
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