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SQLite add Primary Key
...Sqlite by using the CREATE TABLE AS syntax to create a table based on a SELECT statement. Now this table has no primary key but I would like to add one.
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Ruby, remove last N characters from a string?
What is the preferred way of removing the last n characters from a string?
13 Answers
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Difference between 'new operator' and 'operator new'?
...ething like your own container, you can call operator new directly, like:
char *x = static_cast<char *>(operator new(100));
It's also possible to overload operator new either globally, or for a specific class. IIRC, the signature is:
void *operator new(size_t);
Of course, if you overloa...
How to get the connection String from a database
... Visual Studio go to Tools -> Connect to Database.
2] Under Server Name Select your Database Server Name (Let the list Populate if its taking time).
3] Under Connect to a Database, Select Select or enter a database name.
4] Select your Database from Dropdown.
5] After selecting Database try Test ...
Mongoose query where value is not null
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$ne
selects the documents where the value of the field is not equal to
the specified value. This includes documents that do not contain the
field.
User.find({ "username": { "$ne": 'admin' } })
$nin
$nin selects the do...
How to get the full path of running process?
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// include the namespace
using System.Management;
var wmiQueryString = "SELECT ProcessId, ExecutablePath, CommandLine FROM Win32_Process";
using (var searcher = new ManagementObjectSearcher(wmiQueryString))
using (var results = searcher.Get())
{
var query = from p in Process.GetProcesses()
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How to copy data from one table to another new table in MySQL?
...hat you want:
INSERT INTO table2 (st_id,uid,changed,status,assign_status)
SELECT st_id,from_uid,now(),'Pending','Assigned'
FROM table1
If you want to include all rows from table1. Otherwise you can add a WHERE statement to the end if you want to add only a subset of table1.
I hope this helps.
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How can I echo a newline in a batch file?
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@quetzalcoatl, it gets even stranger. Other characters besides dot work too. SS64 says better syntax is echo( for improved performance (still with no space mind you). Extended discussion of other characters and their merits/flaws at ECHO. FAILS to give text or blank ...
Linq to SQL how to do “where [column] in (list of values)”
...CodeData>()
where codeIDs.Contains(codeData.CodeId)
select codeData;
But you might as well do that in dot notation:
var foo = channel.AsQueryable<CodeData>()
.Where(codeData => codeIDs.Contains(codeData.CodeId));
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What does the ??!??! operator do in C?
...otnote 12 (h/t @Random832):
The trigraph sequences enable the input of characters that are not defined in the Invariant Code Set as
described in ISO/IEC 646, which is a subset of the seven-bit US ASCII code set.
share...