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Cannot simply use PostgreSQL table name (“relation does not exist”)
...its schema, the query will match that table name by checked each schema in order. Just like PATH in the shell or include_path in PHP, etc. You can check your current schema search path:
SHOW search_path
"$user",public
You can change your schema search path:
SET search_path TO showfinder,publ...
When to Redis? When to MongoDB? [closed]
...performance is not that great and can't be compared to Redis.
Use Redis in order to speed up your existing application.
Redis can be easily integrated as a LRU cache. It is very uncommon to use Redis as a standalone database system (some people prefer referring to it as a "key-value"-store). Websit...
Set every cell in matrix to 0 if that row or column contains a 0
...e pass since a single bit has an effect on bits before and after it in any ordering. IOW Whatever order you traverse the array in, you may later come accross a 0 which means you have to go back and change a previous 1 to a 0.
Update
People seem to think that by restricting N to some fixed value (s...
PostgreSQL DISTINCT ON with different ORDER BY
...equal. [...] Note that the "first row" of each set is unpredictable unless ORDER BY is used to ensure that the desired row appears first. [...] The DISTINCT ON expression(s) must match the leftmost ORDER BY expression(s).
Official documentation
So you'll have to add the address_id to the order by...
Node Version Manager install - nvm command not found
...
this worked for me but in order to automate it i had to create profile first. "touch ~/.profile", "open ~/.profile" , paste above, save+ close. works in new windows now
– Sonic Soul
Jun 4 '16 at 15:47
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MySQL - Get row number on select
...query to:
SET @rank=0;
SELECT @rank:=@rank+1 AS rank, itemID, COUNT(*) as ordercount
FROM orders
GROUP BY itemID
ORDER BY ordercount DESC;
SELECT @rank;
The last select is your count.
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How to use concerns in Rails 4
... the idea is to extract common and / or context specific chunks of code in order to clean up the models and avoid them getting too fat and messy.
As an example, I'll put one well known pattern, the taggable pattern:
# app/models/product.rb
class Product
include Taggable
...
end
# app/models/...
Eclipse: Error “.. overlaps the location of another project..” when trying to create new project
...oldish)
Click OK
Once the project rebuilds, everything should be back in order.
(This was written when Eclipse Indigo was in vogue, and there may be changes as Google updates their tools to cover corner cases.)
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django order_by query set, ascending and descending
How can I order by descending my query set in django by date?
11 Answers
11
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Quickly reading very large tables as dataframes
...e end object is a data frame. So you have to convert it to a zoo object in order to use it with zoo. Look at the examples in the zoo docs for illustrations.
– JD Long
Apr 2 '13 at 12:48
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