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What are five things you hate about your favorite language? [closed]
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Wow, I'm surprised that SQL hasn't made it up here yet. Guess that means nobody loves it :)
Inconsistent syntax across implementations
Subtle code differences can have massive performance ramifications for seemingly obscure reasons
Poor support fo...
How to escape a JSON string to have it in a URL?
...t you do from here on, you might be opening yourself for a security issue (SQL injection, etc.)
– Tit Petric
Jul 27 '17 at 7:25
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How to Sync iPhone Core Data with web server, and then push to other devices? [closed]
...base mobile. This basically does all you want. (http://www.couchbase.com/nosql-databases/couchbase-mobile)
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How to reset postgres' primary key sequence when it falls out of sync?
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-- Login to psql and run the following
-- What is the result?
SELECT MAX(id) FROM your_table;
-- Then run...
-- This should be higher than the last result.
SELECT nextval('your_table_id_seq');
-- If it's not higher... run this set the ...
Cannot truncate table because it is being referenced by a FOREIGN KEY constraint?
Using MSSQL2005, can I truncate a table with a foreign key constraint if I first truncate the child table (the table with the primary key of the FK relationship)?
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How to change the foreign key referential action? (behavior)
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Example:
I have a UserDetails table refers to Users table:
mysql> SHOW CREATE TABLE UserDetails;
:
:
`User_id` int(11) DEFAULT NULL,
PRIMARY KEY (`Detail_id`),
KEY `FK_User_id` (`User_id`),
CONSTRAINT `FK_User_id` FOREIGN KEY (`User_id`) REFERENCES `Users` (`User_id`)
:
:
F...
Create Django model or update if exists
...default, from the docs:
Django abstracts the need to use INSERT or UPDATE SQL statements.
Specifically, when you call save(), Django follows this algorithm:
If the object’s primary key attribute is set to a value that evaluates
to True (i.e., a value other than None or the empty string), Django
e...
How to alias a table in Laravel Eloquent queries (or using Query Builder)?
...otected $table = "books";) then how can I make an aliases? (e.g. generated sql: ... FROM books AS A ...)
– Aldi Unanto
Apr 23 '15 at 3:50
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Why are trailing commas allowed in a list?
...n avoid this by pre-pending the comma. I do that all the time when writing SQL
– Burhan Khalid
Jul 22 '12 at 5:21
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Why are Where and Select outperforming just Select?
...e ended up replacing <1%. And most of those were due to LINQ2EF's poor SQL optimization, rather than being LINQ's fault.
So, like always, write clear and sensible code first, and wait until after you've profiled to worry about micro-optimizations.
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