Re: triggers- how to bring updates in one table to another table
CREATE TRIGGER sync_t AFTER UPDATE ON table1 FOR EACH ROW UPDATE table2 SET name = NEW.name WHERE id = NEW.id; i have two tables namely.. table1 and table2, table1 and table2 have the two columns samely like id and name, by using triggers i have to bring the updates in table1 to table2, if i updated name in table1 trigger has to made the same up date for table2. please help me regarding this. thnaks in advance -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Best way to synchronize two database schemas
One of the ways is to keep db scema under revision control system. And update it every N minutes. % crontab -l 0 * * * * mysqldump testdb --no-data testdb_schema.sql svn ci -m db schema: `date` /dev/null I have a two databases, one in a production environment (let's call it db_prod) and the other in a testing environments (Let's call it db_test). What is the best way to synchronize the database schemas? db_test has had a few indexes and constraints added to several tables and I need to generate a MySQL script to apply these changes to db_prod. So basically I want to dump the schemas of the two database, compare, and generate the necessary script to apply to db_prod. Thanks, Randall Price -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: SCALING INSERT
If you only need very fast INSERTs, you might try to use ARCHIVE storage engine ( http://dev.mysql.com/tech-resources/articles/storage-engine.html ). It was developed for handling INSERTs very fast. Many peoples use it, for example, for storing logs. Hi list, I want to insert 1 records/sec into table. There can be n number of tables with unique data in each. What are the possible ways to do ? Thanks, Krishna -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Table advice.
Hello. Your query performs a full table scan, because if you match text with '%...' wildcard, MySQL can't using index. Try to use external full-text search engines like Sphinx (http://www.sphinxsearch.com/) or Lucene (http://lucene.apache.org). I have a database that I am (will) be using to track URL's. The table structure looks like this: CREATE TABLE event ( eid INT UNSIGNED NOT NULL AUTO_INCREMENT, timestamp INT(10) UNSIGNED NOT NULL DEFAULT 0, ipINT(10) UNSIGNED NOT NULL DEFAULT 0, fqdn VARCHAR(255), domainVARCHAR(63), tld VARCHAR(63), actionVARCHAR(4), request TEXT, referrer TEXT, clientVARCHAR(255), INDEX eid (eid), INDEX timestamp (timestamp), INDEX ip (ip), INDEX fqdn (fqdn), INDEX domain (domain), INDEX tld (tld) ); The is no real logic behind the indexes, the table was hobbled together looking at examples. Currently I am trying queries on about 300 million records and the results are pretty crappy. for example, a query like this: select domain,count(domain) as count from event where domain like '%facebook%' group by domain order by count desc; takes about 5 minutes to complete. Most of the queries will be like that above but probably with additional filters like date constraints or IP constraints or a mixture of both. I can also see searches through the requests for filetypes etc. Any suggestions or comments would be appreciated. Thanks. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=kolese...@gmail.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
