Exemple de scritp mysql. Exemple d'application PHP et MySQL : Niouzilla © Christophe Lauer - clauer@linux-france.org (Relu par Armel Fauveau et John Gallet) Un exemple concret : un site de publication de nouvelles Afin d’illustrer le développement d’applications Web dynamiques en PHP, nous allons construire des scripts qui nous permettront d’afficher, de saisir et de gérer des nouvelles, un peu à la façon de Slashdot ( ou encore de Linuxfr.org ( Bien entendu, les scripts que nous allons réaliser ne sont qu’un embryon d’application.
De nombreuses améliorations pourraient être faites (gestions des erreurs, optimisations diverses, etc.). Ces quelques scripts ont avant tout un but didactique : ils vont nous permettre d’étudier les points suivants : Nous avons choisi d'utiliser MySQL comme SGBD, ce dernier étant parmi les plus utilisés avec PHP. But Ensuite, nous allons créer une page contenant un formulaire HTML qui permettra aux visiteurs du site de saisir des nouvelles. Fonctionnalités Page d’accueil Page de saisie else. Top 20+ MySQL Best Practices. Database operations often tend to be the main bottleneck for most web applications today.
It's not only the DBA's (database administrators) that have to worry about these performance issues. We as programmers need to do our part by structuring tables properly, writing optimized queries and better code. In this article, I'll list some MySQL optimization techniques for programmers. Before we start, be aware that you can find a ton of useful MySQL scripts and utilities on Envato Market. Most MySQL servers have query caching enabled. The main problem is, it is so easy and hidden from the programmer, most of us tend to ignore it. The reason query cache does not work in the first line is the usage of the CURDATE() function. Using the EXPLAIN keyword can give you insight on what MySQL is doing to execute your query. The results of an EXPLAIN query will show you which indexes are being utilized, how the table is being scanned and sorted etc...
After adding the index to the group_id field: Copying tables in MySQL. Whether you need to copy a test table to a production database, or you need to duplicate a table with only some selected rows or you just need to backup the original table, copying tables is a frequent task most of us regularly do.
In this post we will see some quick methods to make copies of MySQL database tables. For these examples I’ve used the following table structure. Quickly copying tables. The most common task is to copy the table structures. The following statement copies the structure of the ‘admin’ table to a new table called ‘newadmin’. Note that only the structure and not the data is copied to the new table. In the above examples it is assumed that the source and the destination tables which we want to copy are in the same database, but you can also copy tables from another database by prefixing the database name before the table. You can also specify the destination database in the query. This will only copy the ‘username’ and ‘password’ columns to the new table. MySQL Tutorial. We use the classicmodels database as a MySQL sample database to help you work with MySQL quickly and effectively.
The classicmodels database is a retailer of scale models of classic cars database. It contains typical business data such as customers, products, sales orders, sales order line items, etc. We use this sample database in our MySQL tutorials to demonstrate many MySQL features from simple queries to complex stored procedures. Download MySQL Sample Database You can download the MySQL sample database in the following link: The download file is in ZIP format so you need a zip program to unzip it. After uncompressing the sampledatabase.zip file, you can load the sample database into MySQL database server by following how to load sample database into MySQL database server tutorial and test it by using the following SQL statements: USE classicmodels; SELECT * FROM customers;