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Update multiple rows in same query using PostgreSQL
...status;
select * from results_dummy;
-- THE update of multiple rows with/by different values
update results_dummy as rd
set status=new.status, updated_at=now()
from (select unnest(array[1,2,5]::int[]) as id,unnest(array['a`','b`','e`']::text[]) as status) as new
where rd.id=new.id;
select * fr...
Setting up foreign keys in phpMyAdmin?
...In the row for PID, choose PARENT->ID from the dropdown and click GO.
By doing an export on the CHILD table, you should see a foreign key constraint has been created for the PID column.
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What does Html.HiddenFor do?
...page and have passed back when another call is made but shouldn't be seen by the user.
Consider the following ViewModel class:
public class ViewModel
{
public string Value { get; set; }
public int Id { get; set; }
}
Now you want the edit page to store the ID but have it not be seen:
&l...
Group a list of objects by an attribute : Java
...gt;> studlistGrouped =
studlist.stream().collect(Collectors.groupingBy(w -> w.stud_location));
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Problems with Android Fragment back stack
...we keep in mind that .replace() is equal with .remove().add() that we know by the documentation:
Replace an existing fragment that was added to a container. This is essentially the same as calling remove(Fragment) for all currently added fragments that were added with the same containerViewId an...
Why do browsers match CSS selectors from right to left?
CSS Selectors are matched by browser engines from right to left. So they first find the children and then check their parents to see if they match the rest of the parts of the rule.
...
Difference between filter and filter_by in SQLAlchemy
Could anyone explain the difference between filter and filter_by functions in SQLAlchemy?
Which one should I be using?
...
Map enum in JPA with fixed values?
...ions earlier than JPA 2.1, JPA provides only two ways to deal with enums, by their name or by their ordinal. And the standard JPA doesn't support custom types. So:
If you want to do custom type conversions, you'll have to use a provider extension (with Hibernate UserType, EclipseLink Converter, e...
How can I find my Apple Developer Team id and Team Agent Apple ID?
... imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454...
UPDATE multiple tables in MySQL using LEFT JOIN
...ow you to update a table with information from a third table that is liked by a second table.
UPDATE t1
LEFT JOIN
t2
ON
t2.some_id = t1.some_id
LEFT JOIN
t3
ON
t2.t3_id = t3.id
SET
t1.new_column = t3.column;
This would be useful in a case where you had users and groups, and you wanted a ...