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Effect of NOLOCK hint in SELECT statements
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NOLOCK typically (depending on your DB engine) means give me your data, and I don't care what state it is in, and don't bother holding it still while you read from it. It is all at once faster, less resource-intensive, and very very dangerous.
You should be warned to never do an update from or ...
DISTINCT for only one column
...OM Products
WHERE ProductModel = 2
AND ProductName LIKE 'CYBER%'
) a
WHERE rn = 1
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Operator precedence with Javascript Ternary operator
...ause> is assigned to <variable>, <false clause> is ignored, and the next statement is executed.
If <expression> evaluates to false, then <true clause> is ignored and the value of <false clause> is assigned to <variable>.
The important thing to realise with th...
Eager load polymorphic
... this issue, you need to explicitly define the relationship between Review and Shop.
class Review < ActiveRecord::Base
belongs_to :user
belongs_to :reviewable, polymorphic: true
# For Rails < 4
belongs_to :shop, foreign_key: 'reviewable_id', conditions: "reviews.reviewable_type = ...
Android - Emulator in landscape mode, screen does not rotate
When I switch to landscape mode ( NUMPAD 7 or CTRL + F11 ) the emulator rotates the screen to landscape orientation but the Android OS and none of the apps rotate. So everything is sitting sideways. Is there something in the AVD configuration that needs to be set in order for the device to rotate ...
How to run SQL script in MySQL?
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If you’re at the MySQL command line mysql> you have to declare the SQL file as source.
mysql> source \home\user\Desktop\test.sql;
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No submodule mapping found in .gitmodule for a path that's not a submodule
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Following rajibchowdhury's answer (upvoted), use git rm command which is advised is for removing the special entry in the index indicating a submodule (a 'folder' with a special mode 160000).
If that special entry path isn't referenced in the .gitmodule (like 'Classes/Support/Three...
How to perform OR condition in django queryset?
...It would help if you add a print of object.query so we can relate both ORM and Query output to familiarize with it. BTW great example.
– Eddwin Paz
Aug 23 '17 at 21:05
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How to print to console in pytest?
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By default, py.test captures the result of standard out so that it can control how it prints it out. If it didn't do this, it would spew out a lot of text without the context of what test printed that text.
However, if a test fails, it will include a section in the res...
Reflection generic get field value
...ve field value via reflection. The problem is I don't know the fields type and have to decide it while getting the value.
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