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Using a MySQL database - select across multiple tables
Additional Python Facilities example from a Well House Consultants training course
More on Additional Python Facilities [link]
Source code: pysql_another Module: Y115
import MySQLdb # Establish a connection db = MySQLdb.connection(host="127.0.0.1", user="graham", passwd="abc123", db="whm") # Run a MySQL query from Python and get the result set db.query("""select guests.rid, name, about, locate from guests join rooms on guests.rid = rooms.rid""") r = db.store_result() # Iterate through the result set for row in r.fetch_row(0): print row """ -------------------------------------------------------------- Sample output: [trainee@holt px]$ python pysql_another ('2', 'John Smith', 'Shower', 'side') ('4', 'Jane and John Brown', 'Shower', 'side') ('5', 'Boris Morrison', 'Bath and Shower', 'front') [trainee@holt px]$ -- MySQL dump 10.13 Distrib 5.1.46, for redhat-linux-gnu (i386) -- -- Host: 127.0.0.1 Database: whm -- ------------------------------------------------------ -- Server version 5.1.43 /*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */; /*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */; /*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */; /*!40101 SET NAMES utf8 */; /*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */; /*!40103 SET TIME_ZONE='+00:00' */; /*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */; /*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */; /*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */; /*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */; -- -- Table structure for table `guests` -- DROP TABLE IF EXISTS `guests`; /*!40101 SET @saved_cs_client = @@character_set_client */; /*!40101 SET character_set_client = utf8 */; CREATE TABLE `guests` ( `gid` int(11) DEFAULT NULL, `rid` int(11) DEFAULT NULL, `name` text ) ENGINE=MyISAM DEFAULT CHARSET=latin1; /*!40101 SET character_set_client = @saved_cs_client */; -- -- Dumping data for table `guests` -- LOCK TABLES `guests` WRITE; /*!40000 ALTER TABLE `guests` DISABLE KEYS */; INSERT INTO `guests` VALUES (1,2,'John Smith'), (2,4,'Jane and John Brown'), (3,5,'Boris Morrison'); /*!40000 ALTER TABLE `guests` ENABLE KEYS */; UNLOCK TABLES; -- -- Table structure for table `rooms` -- DROP TABLE IF EXISTS `rooms`; /*!40101 SET @saved_cs_client = @@character_set_client */; /*!40101 SET character_set_client = utf8 */; CREATE TABLE `rooms` ( `rid` int(11) DEFAULT NULL, `about` text, `locate` text ) ENGINE=MyISAM DEFAULT CHARSET=latin1; /*!40101 SET character_set_client = @saved_cs_client */; -- -- Dumping data for table `rooms` -- LOCK TABLES `rooms` WRITE; /*!40000 ALTER TABLE `rooms` DISABLE KEYS */; INSERT INTO `rooms` VALUES (1,'Shower','back'),(2,'Shower','side'), (3,'Bath','side'),(4,'Shower','side'), (5,'Bath and Shower','front'); /*!40000 ALTER TABLE `rooms` ENABLE KEYS */; UNLOCK TABLES; /*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */; /*!40101 SET SQL_MODE=@OLD_SQL_MODE */; /*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */; /*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */; /*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */; /*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */; /*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */; /*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */; -- Dump completed on 2010-06-02 19:28:53 """ Learn about this subject
This module and example are covered on the following public courses:
* Learning to program in Python * Python Programming * Intermediate Python Also available on on site courses for larger groups Books covering this topic
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This example comes from our "Additional Python Facilities" training module. You'll find a description of the topic and some
other closely related examples on the "Additional Python Facilities" module index page.
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