"ThinkPHP 5.0 Quick Start" database query language

1, database configuration

return [
     'type' => 'MySQL', // database type 
    'hostname' => '127.0.0.1', // server address 
    ' Database '=>' Test ', // database name 
    ' username '=>' root ', // database username 
    ' password '=>' ', // database password 
    ' HostPort '=>' ', // database connection port 
    ' the params' => [], // database connection parameters 
    ' charset '=> 'UTF8', // database using default encoding UTF8 
    'prefix' => '',// database table prefix 
    'Debug' => to true , // database debug mode 
];

// long connection
 return[
    'Database' => 'Demo',//database name
    'prefix' => 'think_',//database table prefix
    'the params' => [//database connection parameters
         // use long link 
        \ :: ATTR_PERSISTENT the PDO =>to true,
    ],
];
database configuration file // module and only need to configure part of the global database configuration file differences, the same configuration need not be repeated.

2, the native query: a query and Execute, respectively, and for writing queries

$result = Db::execute('insert into think_data (id, name ,status) values (5, "thinkphp",1)');// 增

$result = Db::execute('delete from think_data where id = 5 ');// 删

$result = Db::execute('update think_data set name = "framework" where id = 5 ');// 改

$result = Db::query('select * from think_data where id = 5');// 查

// switch database query 
'DB1' =>  [
    //database configuration. 1
    ...
],
'DB2' =>  [
    //Database Configuration 2
    ...
],
//link
Db :: connent ( 'db1')> Query ( 'SELECT * from think_users');
Db:: connent ( 'DB2') -> Query ( 'SELECT * from think_data');

3, query builder

// Insert recording 
Db :: name ( 'Data' )
     -> INSERT ([ 'ID' => 18 is, 'name' => 'thinkphp' ]); 

// update record 
Db :: name ( 'Data' )
     - > WHERE ( 'ID', 18 is )
     -> Update ([ 'name' => "Framework" ]); 

// query data Db :: = List name $ ( 'data') 
    -> WHERE ( 'ID', 18 is )
     -> SELECT (); 

// delete the data 
Db :: name ( 'data' )
     -> WHERE ( 'ID', 18 is )
     -> delete (); 

// insert multiple records
 Db :: name ( 'data' ) 
    -> insertAll ([[ 'ID' =>. 19, 'name' =>'John Doe'], [ 'id' = > 20, 'name' => ' John Doe'], ...]); 

// dbhelper default reconnected each time the database, multiple calls should therefore be avoided .

4, the operation chain: the chain, regardless of before and after the operation, but must be () or the like in front of the select operation

// query and ten data conditions are met in accordance with the reverse order id 
$ List = Db :: name ( 'Data' )
     -> WHERE ( 'Status',. 1 )
     -> Field ( 'id, name' )
     -> Order ( 'ID', 'desc' )
     -> limit (10 )
     -> SELECT ();

5, transaction support

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