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Why use the INCLUDE clause when creating an index?
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If the column is not in the WHERE/JOIN/GROUP BY/ORDER BY, but only in the column list in the SELECT clause.
The INCLUDE clause adds the data at the lowest/leaf level, rather than in the index tree.
This makes the index smaller because it's not part of the tree
I...
SELECT * WHERE NOT EXISTS
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how would I use this in a HAVING clause? aka group by X having exist [row with employeeID = e.id]
– phil294
Jul 7 '16 at 15:45
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Search for one value in any column of any table inside a database
...Name, ColumnName, ColumnValue, ColumnType, COUNT(*) AS Count FROM #Results
GROUP BY TableName, ColumnName, ColumnValue, ColumnType
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Why does Java allow us to compile a class with a name different than the file name?
...ing nested classes include the following:
It is a way of logically grouping classes that are only used in one place: If a class is useful to only one other class, then it is logical to embed it in that class and keep the two together. Nesting such "helper classes" makes their package more st...
Can you set a border opacity in CSS?
...work in some cases: change the border-style to dotted.
Having alternating groups of pixels between the foreground color and the background color isn't the same as a continuous line of partially transparent pixels. On the other hand, this requires significantly less CSS and it is much more compatibl...
What is the gain from declaring a method as static
... methods and attributes therein. The class java.lang.System is used like a grouping name space rather than an instantiable object.
2. How can Eclipse (or any other programmed or other kind of - biocomposable or non-biocomposable - entity) know for sure which method could be declared as static? Even...
What's the Point of Multiple Redis Databases?
...'s a bad idea to use multiple DBs in Redis. See his comment here:
https://groups.google.com/d/topic/redis-db/vS5wX8X4Cjg/discussion
I understand how this can be useful, but unfortunately I consider
Redis multiple database errors my worst decision in Redis design at
all... without any kind...
How to configure a HTTP proxy for svn
...dy if you need to apply proxy settings in Active Directory environment via Group Policy Objects.
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How to add calendar events in Android?
... .putExtra(Events.TITLE, "Yoga")
.putExtra(Events.DESCRIPTION, "Group class")
.putExtra(Events.EVENT_LOCATION, "The gym")
.putExtra(Events.AVAILABILITY, Events.AVAILABILITY_BUSY)
.putExtra(Intent.EXTRA_EMAIL, "rowan@example.com,trevor@example.com");
startA...
How to show SQL queries run in the Rails console?
...gem file which needs to be added to your application's Gemfile like this:
group :development do
gem 'meta_request'
end
Then run again:
bundle install
Restart your application, open it, and launch developer console, and you should see it like this:
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