Php 我们必须教育读者。您的答案可能是正确的，也可能不是正确的，但在被标记为“低质量”后，您的答案在审核队列中。请花一点时间通过解释来改进您的答案。答案很好，我正在合并的2表联合中构建spesific group by（排除null和零索引），通过这种方式进行分

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我们必须教育读者。您的答案可能是正确的，也可能不是正确的，但在被标记为“低质量”后，您的答案在审核队列中。请花一点时间通过解释来改进您的答案。答案很好，我正在合并的2表联合中构建spesific group by（排除null和零索引），通过这种方式进行分页和排序。遇到此问题。尝试使用

->simplePaginate（n）

代替。哇，约翰尼！非常感谢，这对我来说很好，经过一天的类似问题的挣扎）这是否意味着如果我们有很多数据，它会很好，对吗？我无法控制自己说。。。棒 极 了当我不想错过我的模型时很有用，因为它附加了道具。这正是最好的答案，也是唯一正确的答案。

$recipes = DB::table("recipes")->select("id", "title", "user_id", "description", "created_at")
                    ->where("user_id", "=", $id);

$items = DB::table("posts")->select("id", "title", "user_id", "content", "created_at")
                ->where("user_id", "=", $id)
                ->union($recipes)
                ->paginate(5)->get();

$page = Input::get('page', 1);
$paginate = 5;

$recipes = DB::table("recipes")->select("id", "title", "user_id", "description", "created_at")
            ->where("user_id", "=", $id);
$items = DB::table("posts")->select("id", "title", "user_id", "content", "created_at")
            ->where("user_id", "=", $id)
            ->union($recipes)
            ->get();

$slice = array_slice($items->toArray(), $paginate * ($page - 1), $paginate);
$result = Paginator::make($slice, count($items), $paginate);

return View::make('yourView',compact('result'));

 $page = Input::get('page', 1);

 $paginate = 5;

 $recipes = DB::table("recipes")->select("id", "title", "user_id", "description", "created_at")
                ->where("user_id", "=", $id);
$items = DB::table("posts")->select("id", "title", "user_id", "content", "created_at")
            ->where("user_id", "=", $id)
            ->union($recipes)
            ->orderBy('created_at','desc')
            ->get();

$slice = array_slice($items, $paginate * ($page - 1), $paginate);
$result = Paginator::make($slice, count($items), $paginate);

return View::make('yourView',compact('result'))->with( 'result', $result );

   @foreach($result as $data)
  {{ $data->your_column_name;}}
 @endforeach 

  {{$result->links();}}   //for pagination

$query = $query1->union($query2);
$querySql = $query->toSql();
$query = DB::table(DB::raw("($querySql order by foo desc) as a"))->mergeBindings($query);

select * from (
  (select a as foo from foo)
  union
  (select b as foo from bar)
) as a order by foo desc;

//Create a new Laravel collection from the array data
$collection = new Collection($searchResults);

//Define how many items we want to be visible in each page
$perPage = 5;

//Slice the collection to get the items to display in current page
$currentPageSearchResults = $collection->slice($currentPage * $perPage, $perPage)->all();

//Create our paginator and pass it to the view
$paginatedSearchResults= new LengthAwarePaginator($currentPageSearchResults, count($collection), $perPage);

return view('search', ['results' => $paginatedSearchResults]);

$page = Input::get('page', 1);
$paginate = 5;
$recipes = DB::table("recipes")->select("id", "title", "user_id", "description", "created_at")
            ->where("user_id", "=", $id);
$items = DB::table("posts")->select("id", "title", "user_id", "content", "created_at") ->where("user_id", "=", $id)->union($recipes)->get()->toArray();
$slice = array_slice($items, $paginate * ($page - 1), $paginate);
$result = new Paginator($slice , $paginate);

SELECT A.a_id
     , A.a_name
     , B.organization_id
     , B.organization_name
  FROM customers A 
    LEFT JOIN organizations B ON (A.organization_id = B.organization_id)

UNION ALL

SELECT A.a_id
     , A.a_name
     , B.organization_id
     , B.organization_name
  FROM employees A 
    LEFT JOIN organizations B ON (A.organization_id = B.organization_id)

$query = "
    SELECT A.a_id
         , A.a_name
         , B.organization_id
         , B.organization_name
      FROM customers A 
        LEFT JOIN organizations B ON (A.organization_id = B.organization_id)
     WHERE 1 = 1
       AND B.organization_id = {ORGANIZATION_ID}

    UNION ALL

    SELECT A.a_id
         , A.a_name
         , B.organization_id
         , B.organization_name
      FROM employees A 
        LEFT JOIN organizations B ON (A.organization_id = B.organization_id)

     WHERE 1 = 1
       AND B.organization_id = {ORGANIZATION_ID}
";

$organization_id = request()->organization_id;
$query = str_replace("{ORGANIZATION_ID}", $organization_id, $query);

$query = "
    ( SELECT A.a_id
         , A.a_name
         , B.organization_id
         , B.organization_name
      FROM customers A 
        LEFT JOIN organizations B ON (A.organization_id = B.organization_id)
     WHERE 1 = 1
       AND B.organization_id = {ORGANIZATION_ID}

    UNION ALL

    SELECT A.a_id
         , A.a_name
         , B.organization_id
         , B.organization_name
      FROM employees A 
        LEFT JOIN organizations B ON (A.organization_id = B.organization_id)

     WHERE 1 = 1
       AND B.organization_id = {ORGANIZATION_ID}
    ) AS VIEW_RESULT
";

$organization_id = request()->organization_id;
$query = str_replace("{ORGANIZATION_ID}", $organization_id, $query);

$resultSet = DB::table(DB::raw($query))->paginate(20);

$q1 = Model::createByMe();       // some condition
$q2 = Model::createByMyFriend(); // another condition

$q2->union($q1);
$querySql = $q2->toSql();

$query = Model::from(DB::raw("($querySql) as a"))->select('a.*')->addBinding($q2->getBindings());

$paginated_data = $query->paginate();

"SQLSTATE[21000]: Cardinality violation: 1222 The used SELECT statements have a different number of columns (SQL: (select count(*) as aggregate from `institute_category_places` where `status` = approved and (`category_id` in (3) or `name` LIKE %dancing class% or `description` LIKE %dancing class% or `address_line1` LIKE %dancing class% or `address_line2` LIKE %dancing class% or `city` LIKE %dancing class% or `province` LIKE %dancing class% or `country` LIKE %dancing class%) and `institute_category_places`.`deleted_at` is null) union (select * from `institute_category_places` where `status` = approved and (`category_id` in (3, 4) or `name` LIKE %dancing% or `description` LIKE %dancing% or `address_line1` LIKE %dancing% or `address_line2` LIKE %dancing% or `city` LIKE %dancing% or `province` LIKE %dancing% or `country` LIKE %dancing% or `name` LIKE %class% or `description` LIKE %class% or `address_line1` LIKE %class% or `address_line2` LIKE %class% or `city` LIKE %class% or `province` LIKE %class% or `country` LIKE %class%) and `institute_category_places`.`deleted_at` is null))"

$builder->limit($per_page)->offset($per_page * ($page - 1))->get();

    $bindings = $query_builder->getBindings();
    $sql = $query_builder->toSql();
    foreach ($bindings as $binding) {
        $value = is_numeric($binding) ? $binding : "'" . $binding . "'";
        $sql = preg_replace('/\?/', $value, $sql, 1);
    }
    $sql = str_replace('\\', '\\\\', $sql);

    $total = DB::select(DB::raw("select count(*) as total_count from ($sql) as count_table"));

    $page = Input::get('page', 1);
    $per_page = 15;

    $search_results = $query_builder->limit($per_page)->offset($per_page * ($page - 1))->get();

    $result = new LengthAwarePaginator($search_results, $total[0]->total_count, $per_page, $page, ['path' => $request->url()]);

  /**
         * Paginate a standard Laravel Collection.
         *
         * @param int $perPage
         * @param int $total
         * @param int $page
         * @param string $pageName
         * @return array
         */
        Collection::macro('paginate', function($perPage, $total = null, $page = null, $pageName = 'page') {
            $page = $page ?: LengthAwarePaginator::resolveCurrentPage($pageName);
            return new LengthAwarePaginator(
                $this->forPage($page, $perPage),
                $total ?: $this->count(),
                $perPage,
                $page,
                [
                    'path' => LengthAwarePaginator::resolveCurrentPath(),
                    'pageName' => $pageName,
                ]
            );
        });

$items = DB::table("posts")->select("id", "title", "user_id", "content", "created_at")
                ->where("user_id", "=", $id)
                ->union($recipes)
                ->paginate(5)

$dbs=["db_name1","db_name2"]; 
$query=DB::table("$dbs[0].table_name");
for($i=1;$i<count($log_dbs);$i++){
    $query=DB::table("$dbs[$i].table_name")->union($query);
}
$query=$query->orderBy('id','desc')->paginate(50);

<?php

namespace App\Builder;

use Illuminate\Database\Eloquent\Builder;

class BuilderWithFixes extends Builder
{
    /**
     * Add a union statement to the query.
     *
     * @param  \Illuminate\Database\Query\Builder|\Closure  $query
     * @param  bool  $all
     * @return \Illuminate\Database\Query\Builder|static
     */
    public function union($query, $all = false)
    {
        $query = parent::union($query, $all);
        $querySql = $query->toSql();
        return $this->model->from(\DB::raw("($querySql) as ".$this->model->table))->select($this->model->table.'.*')->addBinding($this->getBindings());
    }
}

<?php

namespace App;

use Eloquent as Model;

class Post extends Model
{
    // your model stuffs...

    public function newEloquentBuilder($query)
    {
        return new \App\Builder\BuilderWithFixes($query);
    }
}

$recipes = Recipe::select("id", "title", "user_id", "description", "created_at")
                 ->where("user_id", "=", $id);

$items = Post::select("id", "title", "user_id", "content", "created_at")
             ->where("user_id", "=", $id)
             ->union($recipes)
             ->paginate(5);