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Efficiently convert rows to columns in sql server
I'm looking for an efficient way to convert rows to columns in SQL server, I heard that PIVOT is not very fast, and I need to deal with lot of records.
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Are there any standard exit status codes in Linux?
...f the return code and 8 bits of the number of the killing signal are mixed into a single value on the return from wait(2) & co..
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <signal.h>
int m...
SQL exclude a column using SELECT * [except columnA] FROM tableA?
...s going to do something like this I might do it this way:
/* Get the data into a temp table */
SELECT * INTO #TempTable
FROM YourTable
/* Drop the columns that are not needed */
ALTER TABLE #TempTable
DROP COLUMN ColumnToDrop
/* Get results and drop temp table */
SELECT * FROM #TempTable
DROP TABLE...
Convert interface{} to int
... ok := val.(int) // Alt. non panicking version
The reason why you cannot convert an interface typed value are these rules in the referenced specs parts:
Conversions are expressions of the form T(x) where T is a type and x is an expression that can be converted to type T.
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A non-constant valu...
How can I clear the SQL Server query cache?
...aination. check out it.
http://www.mssqltips.com/tip.asp?tip=1360
CHECKPOINT;
GO
DBCC DROPCLEANBUFFERS;
GO
From the linked article:
If all of the performance testing is conducted in SQL Server the best approach may be to issue a CHECKPOINT and then issue the DBCC DROPCLEANBUFFERS command....
iPhone: How to get current milliseconds?
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[[NSDate date] timeIntervalSince1970];
It returns the number of seconds since epoch as a double. I'm almost sure you can access the milliseconds from the fractional part.
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How to convert An NSInteger to an int?
...UInteger row = 100;
i > row // true, since the signed int is implicitly converted to an unsigned int
i > (int)row // false
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Lambda expression to convert array/List of String to array/List of Integers
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You could create helper methods that would convert a list (array) of type T to a list (array) of type U using the map operation on stream.
//for lists
public static <T, U> List<U> convertList(List<T> from, Function<T, U> func) {
return fro...
How to convert an int to string in C?
How do you convert an int (integer) to a string? I'm trying to make a function that converts the data of a struct into a string to save it in a file.
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Converting an int to a binary string representation in Java?
What would be the best way (ideally, simplest) to convert an int to a binary string representation in Java?
16 Answers
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