Selects

从数据表中取得所有的数据列

$users = DB::table("users")->get();

foreach ($users as $user)
{
    var_dump($user->name);
}

从数据表中分块查找数据列

DB::table("users")->chunk(100, function($users)
{
    foreach ($users as $user)
    {
        //
    }
});

通过在 闭包 中返回 false 来停止处理接下来的数据列：

DB::table("users")->chunk(100, function($users)
{
    //

    return false;
});

从数据表中取得单一数据列

$user = DB::table("users")->where("name", "John")->first();
var_dump($user->name);

从数据表中取得单一数据列的单一字段

$name = DB::table("users")->where("name", "John")->pluck("name");

取得单一字段值的列表

$roles = DB::table("roles")->lists("title");

这个方法将会返回数据表 role 的 title 字段值的数组。你也可以通过下面的方法，为返回的数组指定自定义键值。

$roles = DB::table("roles")->lists("title", "name");

指定查询子句 (Select Clause)

$users = DB::table("users")->select("name", "email")->get();
$users = DB::table("users")->distinct()->get();
$users = DB::table("users")->select("name as user_name")->get();

增加查询子句到现有的查询中

$query = DB::table("users")->select("name");
$users = $query->addSelect("age")->get();

使用 where 及运算符

$users = DB::table("users")->where("votes", ">", 100)->get();

「or」语法

$users = DB::table("users")
                    ->where("votes", ">", 100)
                    ->orWhere("name", "John")
                    ->get();

使用 Where Between

$users = DB::table("users")
                    ->whereBetween("votes", [1, 100])->get();

使用 Where Not Between

$users = DB::table("users")
                    ->whereNotBetween("votes", [1, 100])->get();

使用 Where In 与数组

$users = DB::table("users")
                    ->whereIn("id", [1, 2, 3])->get();
$users = DB::table("users")
                    ->whereNotIn("id", [1, 2, 3])->get();

使用 Where Null 找有未配置的值的数据

$users = DB::table("users")
                    ->whereNull("updated_at")->get();

Dynamic Where Clauses

You may even use "dynamic" where statements to fluently build where statements using magic methods:

$admin = DB::table("users")->whereId(1)->first();

$john = DB::table("users")
                    ->whereIdAndEmail(2, "john@doe.com")
                    ->first();

$jane = DB::table("users")
                    ->whereNameOrAge("Jane", 22)
                    ->first();

排序(Order By)、分群(Group By) 及 Having

$users = DB::table("users")
                    ->orderBy("name", "desc")
                    ->groupBy("count")
                    ->having("count", ">", 100)
                    ->get();

偏移(Offset) 及 限制(Limit)

$users = DB::table("users")->skip(10)->take(5)->get();