Utilizing Laravel Eloquent to perform substring queries in SQL

Question

Utilizing Laravel Eloquent to perform substring queries in SQL

Struggling with my SQL query in Laravel 8. I'm aiming to extract the first character from the column name, but only for distinct values. These characters will be linked to glossary definitions.

$chars = DB::table('parts')
            ->distinct()
            ->select('name')
            ->orderBy('name', 'asc')
            ->get();

Tried modifying ->select('name') to

->select(DB::raw('SUBSTRING(name, 0, 1)'))

, but the output was incorrect. Saw a similar use of SUBSTRING that worked fine. Any ideas what's amiss in my query?

php laravel eloquent laravel-8

Answer 1

Answer №1

In SQL Server and MySQL, the substring function uses a 1-based index for position. Make sure your second parameter is set to 1 to indicate the first character, and the third parameter should also be set to 1 if you only want to retrieve 1 character.

$characters = DB::table('parts')
    ->distinct()
    ->selectRaw('SUBSTRING(name, 1, 1) AS name_index')
    ->orderBy('name', 'asc')
    ->get();

Answer 2

In SQL Server and MySQL, the substring function uses a 1-based index for position. Make sure your second parameter is set to 1 to indicate the first character, and the third parameter should also be set to 1 if you only want to retrieve 1 character.

$characters = DB::table('parts')
    ->distinct()
    ->selectRaw('SUBSTRING(name, 1, 1) AS name_index')
    ->orderBy('name', 'asc')
    ->get();

Answer 3

Answer №2

If you want to modify your query, consider the following adjustment:

$characters = DB::table('parts')
    ->distinct()
    ->select(DB::raw('SUBSTRING(name, 0,2) character_name'))
    ->orderBy('character_name', 'asc')
    -&>get();

Answer 4

If you want to modify your query, consider the following adjustment:

$characters = DB::table('parts')
    ->distinct()
    ->select(DB::raw('SUBSTRING(name, 0,2) character_name'))
    ->orderBy('character_name', 'asc')
    -&>get();

Utilizing Laravel Eloquent to perform substring queries in SQL

Answer №1

Answer №2

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