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How to change the foreign key referential action? (behavior)
...ess:
Suppose, a table1 has a foreign key with column name fk_table2_id, with constraint name fk_name and table2 is referred table with key t2 (something like below in my diagram).
table1 [ fk_table2_id ] --> table2 [t2]
First step, DROP old CONSTRAINT: (reference)
ALTER TABLE `t...
How to get last inserted row ID from WordPress database?
...dPress plugin has a table with a AUTO_INCREMENT primary key field called ID. When a new row is inserted into the table, I'd like to get the ID value of the insertion.
...
PostgreSQL delete with inner join
...
DELETE
FROM m_productprice B
USING m_product C
WHERE B.m_product_id = C.m_product_id AND
C.upc = '7094' AND
B.m_pricelist_version_id='1000020';
or
DELETE
FROM m_productprice
WHERE m_pricelist_version_id='1000020' AND
m_product_id IN (SELECT m_product...
What is the X-REQUEST-ID http header?
...s (that a client can see) with server logs (that the server can see).
The idea of the X-Request-ID is that a client can create some random ID and pass it to the server. The server then include that ID in every log statement that it creates. If a client receives an error it can include the ID in a b...
How to get Activity's content view?
...
this.getWindow().getDecorView().findViewById(android.R.id.content)
or
this.findViewById(android.R.id.content)
or
this.findViewById(android.R.id.content).getRootView()
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...
Algorithm to generate a crossword
... complexity O(N) )
If no backtrack found, the no solution can be found (at least with this configuration, initial seed etc..)
Else when all wordlots are filled you have one solution
This algorithm does a random consistent walk of the solution tree of the problem. If at some point there is a dead e...
Django filter queryset __in for *every* item in list
...(self):
return self.name
In [2]: t1 = Tag.objects.create(name='holiday')
In [3]: t2 = Tag.objects.create(name='summer')
In [4]: p = Photo.objects.create()
In [5]: p.tags.add(t1)
In [6]: p.tags.add(t2)
In [7]: p.tags.all()
Out[7]: [<Tag: holiday>, <Tag: summer>]
Using chained f...
YouTube API to fetch all videos on a channel
We need a video list by channel name of YouTube (using the API).
14 Answers
14
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DISTINCT for only one column
... Server 2005 or above use this:
SELECT *
FROM (
SELECT ID,
Email,
ProductName,
ProductModel,
ROW_NUMBER() OVER(PARTITION BY Email ORDER BY ID DESC) rn
FROM Produ...
Android: View.setID(int id) programmatically - how to avoid ID conflicts?
...
According to View documentation
The identifier does not have to be unique in this view's hierarchy. The identifier should be a positive number.
So you can use any positive integer you like, but in this case there can be some views with equivalent id's. If you...