How to Alias Tables in Laravel Eloquent and Query Builder Queries?

Table Aliasing in Laravel Eloquent Queries and Query Builder

Many developers using Laravel's query builder or Fluent API often encounter the need to alias tables to make queries more readable and manageable. This article will demonstrate how to alias tables in Laravel Eloquent queries and the Query Builder.

Consider the following scenario:

<code class="php">$users = DB::table('really_long_table_name')
           ->select('really_long_table_name.id')
           ->get();</code>

In SQL, we can use table aliases to simplify the query:

<code class="sql">really_long_table_name AS short_name</code>

Laravel supports table aliases using the AS keyword. To alias a table in Laravel Query Builder, simply add the alias after the table name like this:

<code class="php">$users = DB::table('really_long_table_name AS t')
           ->select('t.id')
           ->get();</code>

Here, the table really_long_table_name has been aliased as t. You can use this alias throughout the query, including in select, where, and other clauses.

To demonstrate the usage, let's perform a query using Tinker:

<code class="bash">Schema::create('really_long_table_name', function($table) {$table->increments('id');});
DB::table('really_long_table_name')->insert(['id' => null]);

DB::table('really_long_table_name AS t')->select('t.id AS uid')->get();</code>

This will return an object with the aliased column uid, as shown below:

<code class="php">array(
  0 => object(stdClass)(
    'uid' => '1'
  )
)</code>

By understanding this technique, you can effectively alias tables in Laravel Eloquent queries and Query Builder, making your code more readable and manageable, especially when working with complex queries.

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