Update of the foreign key to a null value [closed] - php

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This query generates an error:
UPDATE sale
SET NumFacture='Null',
WHERE Code='22'
Where NumFacture is a foreign key in table sale so I can't update it with Null value. How can I do please!

Try without single quotes:
UPDATE sale
SET NumFacture=Null
WHERE Code='22'

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mySQL query from a table [closed]

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A company maintains the data of its customers in the CUSTOMER table. write a query to print the ids and the NAMEs of he customers who are from the USA and whose credit limit is greater than 100000, ordered by increasing ID number
TRIED TO query it from one table but checking the validation is hard for me

I would like to exclude some rows by Eloquent [closed]

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I have a user table that contains a colum "role"
i would like to exclude the ones that contains a certain role by Eloquent
Does any one knows a solution for this ?
To answer your original comment
User::query()->whereNotIn('role', 'blabla')->get();
To answer the second edit of the comment:
User::query()->whereNotIn('role', [
'Admin', 'responsable', 'magasinier', 'demandeur'
])->get();
To answer the third edit of the comment:
User::query()->whereNotIn('role', 'demandeur')->get();

Usage of FIND_IN_SET in query [closed]

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$query=$this->db
->select(a.date,group_concat(s.name)
->from("tbl_attendance a,tbl_students s")
->WHERE ("FIND_IN_SET(s.student_id, a.attendance)")->group_by("a.date")
->get();
I wanted to know whether I have used the FIND_IN_SET and group_by functions correctly. Thanks in advance
FIND_IN_SET() returns the position of a string if it is present (as a
substring) within a list of strings
so you should search if a value is != 0
eg:
->where("FIND_IN_SET(s.student_id, a.attendance) !=", 0)
->group_by("a.date")

PHP Illegal array key type warning (PHPStorm) [closed]

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Here is my example code
It actually works on server but I wonder why do I get this warning?
Thanks
You can't use float number as array index.
To change floats to integer use function like intval

How to implement a loop in php [closed]

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Hi I'm totally new here and with and would glad if someone could help as I'm stuck with how I can create a loop with some php code.
$TotalUniques = $this->TotalUniquesHits($Counts[$xx]['ID']);
The value I'm after is [$xx] which represents a position in the array. How to change it so that I get $TotalUniques looping through all the values of $xx?
You can try with foreach loop:
foreach($Counts as $xx){
$TotalUniques[] = $this->TotalUniquesHits($xx['ID']);
}
You may also consider checking if each $xx has ID key with isset or array_key_exists.

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