Question

我有2个数据库，我想用2个数据库进行查询，例如

SELECT base1.table1.item1 FROM base1.table1 INNER JOIN base2.table3 ON base2.table3.item2 = base1.table1.item2 WHERE base2.table3.item4 = 'toto';

如何使用codeIgniter进行此查询？我已经使用2个数据库在CodeIgniter中配置了database.php。

感谢。

Answer 1

您可以在config / database.php文件中设置2个数据库

onModuleLoad

）;

如果要使用默认数据库，则表示主数据库

$active_group = 'default';
$query_builder = TRUE;

$db['default'] = array(
'dsn'   => '',
'hostname' => 'localhost',
'username' => 'root',
'password' => '',
'database' => 'first_db',
'dbdriver' => 'mysqli',
'dbprefix' => '',
'pconnect' => FALSE,
'db_debug' => (ENVIRONMENT !== 'production'),
'cache_on' => FALSE,
'cachedir' => '',
'char_set' => 'utf8',
'dbcollat' => 'utf8_general_ci',
'swap_pre' => '',
'encrypt' => FALSE,
'compress' => FALSE,
'stricton' => FALSE,
'failover' => array(),
'save_queries' => TRUE
);

//set second db configuration 
$db['otherdb'] = array(
'dsn'   => '',
'hostname' => 'localhost',
'username' => 'root',
'password' => '',
'database' => 'second_db',
'dbdriver' => 'mysqli',
'dbprefix' => '',
'pconnect' => FALSE,
'db_debug' => (ENVIRONMENT !== 'production'),
'cache_on' => FALSE,
'cachedir' => '',
'char_set' => 'utf8',
'dbcollat' => 'utf8_general_ci',
'swap_pre' => '',
'encrypt' => FALSE,
'compress' => FALSE,
'stricton' => FALSE,
'failover' => array(),
'save_queries' => TRUE

如果您的第一个数据库名称是base1，第二个是base2

// use master dataabse
$users = $this->db->get('users');

// connect to secondary database
 $otherdb = $this->load->database('otherdb', TRUE);
 $data = $otherdb->get('table_name');

使用codeIgniter查询多个数据库

1 个答案: