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T-SQL: Using a CASE in an UPDATE statement to update certain columns depending on a condition
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@Somebodyisintrouble: The only way to update one column is to use a different query.
– Adam Robinson
Jun 16 '12 at 18:26
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How do I calculate square root in Python?
...int division by default,
from __future__ import division
Or, you could convert 1 or 2 of 1/2 into a floating point value.
sqrt = x**(1.0/2)
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ReSharper Abbreviations List: Where can I modify it?
I am using ReSharper 4.5, and what often happens when I am converting explicit properties into auto-properties, is that I will accidentally chose "Add XX to abbreviations list".
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When and why will a compiler initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete?
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It is used to detect writing through dangling pointers.
0xED or Aligned Fence 'No man's land' for aligned allocations. Using a
0xBD different value here than 0xFD allows the runtime
to detect not only writing outside the a...
Set the value of a variable with the result of a command in a Windows batch file
...ommand') do @set theValue=%%a
Failing to clear the variable's value when converting a Unix script to Windows batch can be a cause of subtle errors.
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Database design for audit logging
...ed and by whom.
Here's a simple example:
CREATE TABLE dbo.Page(
ID int PRIMARY KEY,
Name nvarchar(200) NOT NULL,
CreatedByName nvarchar(100) NOT NULL,
CurrentRevision int NOT NULL,
CreatedDateTime datetime NOT NULL
And the contents:
CREATE TABLE dbo.PageContent(
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MySQL Error 1215: Cannot add foreign key constraint
...ents_has_Staff.Staff_Emp_ID.
Perhaps the columns in the parent tables are INT UNSIGNED?
They need to be exactly the same data type in both tables.
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Restful API service
... use case of getting some data from a RESTful Web Service, you should look into ResultReceiver and IntentService.
This Service + ResultReceiver pattern works by starting or binding to the service with startService() when you want to do some action. You can specify the operation to perform and pass...
How can I retrieve Id of inserted entity using Entity framework? [closed]
...xt())
{
context.MyEntities.Add(myNewObject);
context.SaveChanges();
int id = myNewObject.Id; // Yes it's here
}
Entity framework by default follows each INSERT with SELECT SCOPE_IDENTITY() when auto-generated Ids are used.
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Best way to get identity of inserted row?
...the current IDENTITY value for a table that you have not inserted a record into."
The OUTPUT clause of the INSERT statement will let you access every row that was inserted via that statement. Since it's scoped to the specific statement, it's more straightforward than the other functions above. How...