Connect 2 queries to 1 - php

Question

I have code like this:
$id = 5;
$a = 1;
$b = ($a === 2 ? 1 : 2);
DB::table('table')->where('id', $id)->where('value', $a)->update(['new_value' => 1]);
DB::table('table')->where('id', $id)->where('value', $b)->update(['new_value' => 2]);
Is it possible to make this 2 queries in 1?

Answer 1

You cannot use the query builder for this. Use DB::statement instead:
DB::statement('UPDATE table SET new_value = CASE
WHEN value = ? THEN ?
WHEN value = ? THEN ?
END WHERE id = ?', [
$a, 1,
$b, 2,
$id,
]);

Answer 2

In mysql query you can achieve by below query:
$mysqlQuery = "UPDATE table1
SET new_value = IF(id=".$id ." AND value=".$a.",1, IF(id=".$id." AND value=".$b.",2,new_value))";
Note:If you want this mysql query to be written in some framework specific query then you can convert it as per your framework syntax or documentation.

Answer 3

AFAIK, not with laravel fluent. There are 2 different queries with different update values. You can however make it into a reusable function.
public function updateNewValue($id, $value, $newValue)
{
return DB::table('table')
->where('id', $id)
->where('value', $value)
->update(['new_value' => $newValue]);
}
Or, you can combine it into one with a switch statement depending on the new_value:
$query = DB::table('table')->where('id', $id);
switch($newValue)
{
case 1:
return $query->where('value', $a)->update(['new_value' => $newValue]);
case 2:
return $query->where('value', $b)->update(['new_value' => $newValue]);
}