… explained that an MV can pre-compute joins and may aggregate and summarize data. … log position. php ./setup_flexcdc.php –ini consumer.ini $ php setup_flexcdc.php setup starting setup …` will automatically be captured. Insert data in one transaction (two rows): mysql> insert into test.demo values (…
Post: Flexviews - part 3 - improving query performance using materialized views
April 4, 2011 By 20 Comments
… … AS SELECT” and/or “INSERT INTO db.schema … AS SELECT” …join customers c using(customer_id) join order_lines ol using(order_id) group by customer_id, customer_name, sale_when; $ php convert.php… too high +——————+ 1 row in set (0.68 sec) mysql> select sum(total_lines) from dashboard_…
Post: SQL Injection Questions Followup
July 26, 2012 By 2 Comments
… how I do it using PHP: $placeholders = join(“,”, array_fill(0, count($params), “?”)); $sql…INSERT-ing binary data? Do I have to protect myself in this situation? Why and how? Any interpolation of unsafe content into… Their MySQL server became CPU-bound, while their multiple PHP application servers…
Comment: Why MySQL could be slow with large tables ?
January 31, 2008 By 141 Comments
…!.. I’m currently working on a web project using MySql, Apache and Php. The database has a relatively acceptable size, not only… intended, but INSERTing in them is a nightmare. I use multiple record INSERTs (150 each time), and the first INSERT usually takes 600… (not joining them with other tables). Once again, I use multiple inserts into the table, with sets of 150 records each: INSERT INTO T (col1…
Post: Read/Write Splitting with PHP Webinar Questions Followup
January 23, 2013 By 4 Comments
…”Read/Write Splitting with PHP” for Percona Webinars. If you… about write splitting (updates,inserts) on multiple MySQL servers? Or is …-heartbeat, which inserts the system timestamp into a dummy table …Join Percona and the MySQL community in Santa Clara, April 22-25 2013 for the Percona Live MySQL…
Post: GROUP_CONCAT useful GROUP BY extension
September 4, 2006 By 49 Comments
…PHP: Table: CREATE TABLE services ( id INT UNSIGNED NOT NULL, client_id INT UNSIGNED NOT NULL, KEY (id)); INSERT INTO…in PHP: old way: with group_concat: This should work faster, as we remove loop from PHP to MySQL …example can be handled with one query with joins, but sometimes we need the temporary …
