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Fetches the next row of a query result set, returning a single sequence, or None when no more data is available. So with some SQL queries cursor.fetchone()[0] could turn into None[0] which leads to raising TypeError exception. Better way to get first row or None is:
value() method returns a single value from the retrieved row or record. Example. use Illuminate\Support\Facades\DB; public function getEmail(){ $email= DB::table('users')->where('name', 'John')->value('email'); return $email; } Explanation. In the example above, we create a function getEmail().
5 Αυγ 2021 · Eloquent provides several methods that can be accessed directly from models to query the database and filter results without having to write SQL statements. A typical SELECT query to obtain all rows from a table, which in pure SQL looks something like SELECT * FROM links, can be accomplished in Eloquent with code like this:
31 Αυγ 2020 · You'll learn how to pull data from relational databases straight into your machine learning pipelines, store data from your Python application in a database of your own, or whatever other use case you might come up with.
16 Ιαν 2024 · Laravel’s Query Builder allows for chaining other methods with the distinct() clause, providing a more selective query. Distinct With Where Clause $activeUsers = DB::table('users') ->distinct() ->where('status', 'active') ->get(['country']);
4 Νοε 2023 · 1. get(): Fetch All Matching Records. Imagine you have a database table of products, and you want to retrieve all the products that are currently available. You can use the get() method: $availableProducts = Product:: where ('status', 'available') ->get (); 2. first(): Retrieve the First Matching Record.
26 Νοε 2014 · If you need single field only, then use pluck (which returns single value - string by default): // let's assume user_id is 5. DB::table('attendances') ->where('date_only', '=', $newdate) ->orderBy('logon','asc') ->pluck('user_id'); // "5". When you need whole row, then first (which returns stdObject):
