laravel5数据库操作

怼烎@ 2022-09-24 07:26 185阅读 0赞

<?php
    namespace App;
    use Illuminate\Database\Eloquent\Model;
    use Illuminate\Database\Eloquent\SoftDeletes;
    use DB;
    
    class User extends Model {
    
    	static function getResult(){
    		$res=null;
    		/*
    		//插入
    		$user=array('username'=>'test','password'=>'123456','age'=>23);
    		$res = DB::table('users')->insert($user);
    		*/
    		
    		/*
    		//查询
    		res = DB::table('users')->where('username','test')->first();//一维
    		$res = DB::table('users')->where('username','test')->get(); //二维
    		$res = DB::select('SELECT * FROM users WHERE username="test"');
    		*/
    		
    		/*
    		//更新数据
    		$res =DB::update('UPDATE users SET age=25 WHERE username="test"');
    		$res =DB::table('users')->where('username','test')->update(array('age' =>23));
    		*/
    		
    		/*
    		//删除数据
    		$res = DB::delete('DELETE FROM users WHERE username="joy"');
    		$res = DB::table('users')->where('username','joy')->delete();
    		*/
    		
    		/*
    		//字段添加
    		$res = DB::statement('ALTER TABLE users ADD sex tinyint(1) not null default 0');
    		*/
    		
    		/*事务
    		DB::transaction(function(){
    			$user=array(xxxx);
    			DB::table('user')->insert($user);
    			DB.....
    		});
    		*/
    		
    		/*
    		//结果查询器
    		$res = DB::table('users')->where('username','test')->pluck('age');//去特定字段值
    		$res = DB::table('users')->lists('age');//特殊字段list值
    		$res = DB::table('users')->select(array('id','username'))->get();多个特殊字段查询
    		$res = DB::table('users')->where('id','>',1)->get();
    		$res = DB::table('users')->where('id',1)->get();
    		$res = DB::table('users')->whereId(1)->get();
    		
    		$res = DB::table('users')->where('id','<',3)->where('username','test')->get();
    		$res = DB::table('users')->where('id','>',3)->orWhere('username','test')->get();
    		
    		
    		$res = DB::table('users')->where('username','test')->where(function($query){
    		$query->where('age','>',13)->orWhere('sex',0);
    		})->get();//相当于username = 'test' and (age>13 or sex=0)
    		
    		$res = DB::table('users')->whereBetween('age',array(0,15))->get();
    		$res = DB::table('users')->whereNotBetween('age',array(0,15))->get();
    		$res = DB::table('users')->whereIn('age',array(23,30))->get();
    		$res = DB::table('users')->whereNot In('age',array(23,30))->get();
    		*/
    		
    		
    		//$res = DB::table('users')->groupBy('sex')->orderBy('id','DESC')->having('sex','=',0)->get();
    		//$res = DB::table('users')->limit(2,3)->get();
    		//$res = DB::table('users')->skip(2)->take(1)->get();
    
    		//$res = DB::table('posts')->join('users','posts.user_id','=','users.id')->get();
    		// $res = DB::table('posts')->join('users',function($query){
    		// $query->on('posts.user_id','=','users.id');//->On(...);
    		// })->get();
    		
    		/*
    		//嵌套查询
    		$res = DB::table('users')->where(function($query){
    		if(Input::get('status')){
    		$query->whereStatus(Input::get('status'));
    		}
    		if(Input::get('source')){
    		$query->whereSource(Input::get('source'));
    		}
    		})->get();
    		*/
    		
    		/*	
    		$res = DB::table('users')->whereExists(function($query){
    			$query->select('*')->from('posts')->whereRaw(DB::raw('users.id = posts.user_id'));
    		})->get();
    		*/
    		
    		$res = DB::table('users')->where('id','>','2')->count();
    		$res = DB::table('posts')->where('id',6)->decrement('view_count',5);//减5
    		//$res=DB::table('posts')->truncate();//清表
    		
    
    		print_r($res);exit;
    	}
    }