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Why is LINQ JOIN so much faster than linking with WHERE?
...ite efficient because the DB knows how to perform a join. But it doesn't really make sense to compare it with the other approaches, since they work directly in memory (Linq to DataSet)
The query with multiple tables and a Where condition actually performs a cartesian product of all the tables, then ...
How can a web application send push notifications to iOS devices? [closed]
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11 Answers
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How can I find which tables reference a given table in Oracle SQL Developer?
...y PLSQL Developer:
select table_name, constraint_name, status, owner
from all_constraints
where r_owner = :r_owner
and constraint_type = 'R'
and r_constraint_name in
(
select constraint_name from all_constraints
where constraint_type in ('P', 'U')
and table_name = :r_table_name
and own...
Why is “Set as Startup” option stored in the suo file and not the sln file?
...e this setting should be stored in the solution file so it's shared across all users and part of source code control. Since we don't check in the suo file, each user has to set this separately which seems strange.
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How can I git stash a specific file?
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Not the most user-friendly approach, but it gets the work done if you really need it.
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Proper use of errors
... It seems to be missing a more general type for invalid argument. Not all invalid arguments fall under RangeError. Should you define custom types or just throw new Error("<message>");?
– anddero
Apr 5 at 7:39
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is of a type that is invalid for use as a key column in an index
...x. nvarchar(100)
2. Create a check constraint that compares the value with all the keys in the table.
The condition is:
([dbo].[CheckKey]([key])=(1))
and [dbo].[CheckKey] is a scalar function defined as:
CREATE FUNCTION [dbo].[CheckKey]
(
@key nvarchar(max)
)
RETURNS bit
AS
BEGIN
declare...
Adding Core Data to existing iPhone project
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All the CoreData header files are imported in App_Prefix.pch, so the CoreData classes will be available throughout your Project, so you don't have to manually import the header in the files you need them.
So open up Xcode an...
What C++ Smart Pointer Implementations are available?
...g limited garbage collection facilities. The first downside being that it calls delete upon destruction making them unacceptable for holding array allocated objects (new[]). It takes ownership of the pointer so two auto pointers shouldn't contain the same object. Assignment will transfer ownership a...
How to prevent text in a table cell from wrapping
...t:
Use nowrap attribute inside the "td" tag:
<th nowrap="nowrap">Really long column heading</th>
Use non-breakable spaces between your words:
<th>Really&nbsp;long&nbsp;column&nbsp;heading</th>
...