ThinkPHP5-简单的批量查询

TP5的EXP、批量查询、聚合查询等。<!--more-->//使用EXP条件表达式，表示后面是原生的SQL表达式$result = Db::table('think_inno')->where('id','exp',"<10 and name='asd'")->select();dump($result);//使用and和or进行混合查询$result = Db::table('think_inno')->where('name','like','%think%')//name类似%thinkphp%->where('id',['in',[1,2,3]],['>=',1],'or')//id在1~3之间，或者id>=1->limit(2)->select();//批量查询$result = Db::table('think_inno')   //批量查询->where(['id' => [['in',[1,2,3]],['>=',1],'or'], 'name' => ['like','%think%']]) //(id在1~3中或者id>=1 )并且name类似think->limit(10)->select();//快速查询$result = Db::table('think_inno')->where('id&num','>',1)->select();id&num表示and；id&num表示or；//关于视图将查询的结果作为一张虚拟的表；TP里直接用Db::view来使用视图$result = Db::view('think_inno','id,name')......;//think-inno为表名，id,name为要查的字段//使用query对象$query = new \think\db\Query;$query->table('think_inno')->where('name','like','think')->where('id','>=','3')->limit(10);$result = Db::select($query);print_r($result);//获取某列某行的某个值$name = Db::table('think_inno')->where('id',10)->value('name');print_r($name);//取到id为10的name字段的值//获取某列column$name = Db::table('think_inno')->where('status',1)->column('name');//取出status为1对应name列的所有值//获取某一行find//获取id键名的数据集$name = Db::table('think_inno')->where('num',0)->column('*','id');print_r($name);//聚合查询count、max、min、avg、sum$count = Db::table('think_inno')->where('num',0)->count();//获取num为0的对应的数据量$count = Db::table('think_inno')->where('num',2)->max('id');//获取num为2的最大的id