In my program i first make a lot of REPLACEs (1 and even more) and
immediately after that i make a SELECT on the same table.
Is it posible that MySQL messes up and makes the SELECT before the last
REPLACE is done?
Thanks
Goran
I wonder if mysql uses indexes in temporary tables(when making a join on
temp tables etc.)?
-
Before posting, please check:
http://www.mysql.com/manual.php (the manual)
http://lists.mysql.com/ (the list
How to optimize this query:
SELECT col1, col2, MAX(col3) FROM Table WHERE col42 AND col5 = 2 GROUP BY
col3 LIMIT 1;
The best that i figured out is to set the index on col3.
I was unable to find out the working combination for multi-column indexing.
Please advice.
I have a php file with
1. CREATE TEMPORARY TABLE on tableA;
2. REPLACE into tableA;
3. CREATE TEMPORARY TABLE on tableA;
4. REPLACE into tableA;
Can i be sure that the REPLACE in step 2. will be finished before the TEMPORARY table
in step 3. is made?
Lets say i have 10.000 rows in a table and im searching for only one record(one row).
Which one is faster:
SELECT ... LIMIT 1
or just
SELECT ..
?
Has anyone done a db for a multi-level compensation structure? I'm talking
about a company that is MLM or a multi-level marketing network. Where
distributors sign up under other distributors and the downline can go down
many levels(but limited levels!). The important issue is how long would it
