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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...
Uniq by object attribute in Ruby
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This is the correct answer for ruby 1.9 and later versions.
– nurettin
Dec 15 '12 at 7:06
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Draw in Canvas by finger, Android
I need to build a project for drawing on canvas by fingers,
6 Answers
6
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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...
Using the “animated circle” in an ImageView while loading stuff
...tiveLayout>
And when you finish loading, call this one line:
findViewById(R.id.loadingPanel).setVisibility(View.GONE);
The result (and it spins too):
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How to assign the output of a command to a Makefile variable
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Thank you! This helps me bypass "weird bash" in makefile
– Nam G VU
Oct 31 '17 at 7:52
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MySQL: Selecting multiple fields into multiple variables in a stored procedure
...ted
FROM products
WHERE pName = iName
You can also make them unambiguous by referencing the table, like:
[ Credit : maganap ]
SELECT p.Id, p.dateCreated INTO id, datecreated FROM products p
WHERE pName = iName
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How to implement one-to-one, one-to-many and many-to-many relationships while designing tables?
...on do we must need 3 tables for Many-to-many relationship.can't it be done by two tables the Many-to-many Relationship.
– user2166164
May 23 '15 at 12:57
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schema builder laravel migrations unique on two columns
... Also notice that composite primary keys are generally frowned upon by the Laravel developers, and they are not supported by Eloquent - see github.com/laravel/framework/issues/5355
– andrechalom
Oct 6 '17 at 15:35
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How can I remove duplicate rows?
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Assuming no nulls, you GROUP BY the unique columns, and SELECT the MIN (or MAX) RowId as the row to keep. Then, just delete everything that didn't have a row id:
DELETE FROM MyTable
LEFT OUTER JOIN (
SELECT MIN(RowId) as RowId, Col1, Col2, Col3
F...