Take a look here.
http://dev.mysql.com/doc/refman/5.0/en/timestamp-initialization.html
timestamp field can be autoupdated and autoinitilizated
With both DEFAULT CURRENT_TIMESTAMP and ON UPDATE CURRENT_TIMESTAMP, the
column has the current timestamp for its default value and is automatically
hello,
I have a table with around 2,000,000 records (15 columns). I have to sync this
from an outside source once everyday. not all records are changed/removed
/new-added everyday. so what is the best way to update only those which have
changed/added/or deleted?
i can use update_or_create but
If'n it were my nickel, here is how I would solve the problem (at a somewhat
high level). That is, assuming I had an ETL tool available.
1. Create landing tables for your source data.
2. Load data from the source table(s) to your new landing table(s).
3. Perform lookups from the new landing table
2013/04/06 13:56 -0700, Rajeev Prasad
I have a table with around 2,000,000 records (15 columns). I have to sync this
from an outside source once every day. not all records are changed/removed
/new-added everyday. so what is the best way to update only those which have
changed/added/or
thx all, the source data is in text file.
- Original Message -
From: h...@tbbs.net h...@tbbs.net
To: mysql list mysql@lists.mysql.com
Cc:
Sent: Saturday, April 6, 2013 8:02 PM
Subject: Re: update a row only if any column has changed, in a very large table
2013/04/06 13:56 -0700,
