This is for http://cssfingerprint.com I collect timing stats about how fast the different methods I use perform on different browsers, etc., so that I can optimize the scraping speed. Separately, I h
The two statements have totally different performance: mysql> explain select * from jobswhere createIndexed=false;
Setup: mysql> create table test(id integer unsigned,s varchar(30)); Query OK, 0 rows affected (0.05 sec)
I\'ve got a function written by another developer which I am trying to modify for a slightly different use.It is used by a SP to check if a certain phrase exists in a text document stored in the DB, a
Table_Design: ID \"Alpha\" \"Beta\" Table_Size: Design_IDSize \"Alpha\"S \"Alpha\"M \"Alpha\"L \"Beta\"S \"Beta\"L
I\'m puzzled by the following. I have a DB with around 10 million rows, and (among other indices) on 1 column (campaignid_int) is an index.
Why does explain say that it uses type ALL for contests table though contest table has chid as primary key?
I have a large table (~1M rows now, soon ~10M) that has two ranked columns (in addition to the regular data):
I want to get 1000 records from a table randomly, so I use: SELECT top 1000 mycol1 , mycol2 , ROW_NUMBER() OVER (ORDER BY NEWID()) rn
I have a query of the form SELECT uid1,uid2 FROM friend WHERE uid1 IN (SELECT uid2 FROM friend WHERE uid1=\'.$user_id.\') and uid2 IN (SELECT uid2 FROM friend WHERE uid1=\'.$user_id.\')
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