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Optimizing a Large SQL Server Table with a Better Primary Key
Introduction Inheriting a large SQL Server table with suboptimal indexing can be a daunting task, especially when dealing with a 10 TB table. In this article, we’ll explore a real-world scenario where a table uses a uniqueidentifier as its clustered primary key and has an unnecessary identity int column. We’ll discuss the steps to efficiently optimize this table by replacing the clustered…
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В данном материале подробно рассмотрен тип данных UNIQUEIDENTIFIER в Microsoft SQL Server, с помощью которого можно генерировать GUID, Вы узнаете, для чего нужен GUID и какие инструменты в языке T-SQL есть для работы с GUID
Из данного материала Вы узнаете, что такое GUID и как работать с этим GUID в Microsoft SQL Server
Fixed: Is a hard drive's serial number globally unique? #computers #answer #fix
Fixed: Is a hard drive's serial number globally unique? #computers #answer #fix
Is a hard drive’s serial number globally unique?
On Linux I can use smartctl to get a hard drive’s vendor, model, firmware revision and serial number:
# smartctl -a /dev/sdb smartctl 5.40 2010-07-12 r3124 [x86_64-unknown-linux-gnu] (local build) Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.netDevice: SEAGATE ST9300603SS Version: 0006 Serial number: 6SE1ZCSR0000B121LU63…
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Solution: Is a hard drive's serial number globally unique? #programming #it #computers
Solution: Is a hard drive's serial number globally unique? #programming #it #computers
Is a hard drive’s serial number globally unique?
On Linux I can use smartctl to get a hard drive’s vendor, model, firmware revision and serial number:
# smartctl -a /dev/sdb smartctl 5.40 2010-07-12 r3124 [x86_64-unknown-linux-gnu] (local build) Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.netDevice: SEAGATE ST9300603SS Version: 0006 Serial number: 6SE1ZCSR0000B121LU63…
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Fixed Is there a unique Android device ID? #dev #it #asnwer
Fixed Is there a unique Android device ID? #dev #it #asnwer
Is there a unique Android device ID?
Do Android devices have a unique id, and if so, what is a simple way to access it via Java?
Answer: Is there a unique Android device ID?
Settings.Secure#ANDROID_ID returns the Android ID as an unique 64-bit hex string.
import android.provider.Settings.Secure; private String android_id = Secure.getString(getContext().getContentResolver(), Secure.ANDROID_ID);
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How to: Is there a unique Android device ID?
How to: Is there a unique Android device ID?
Is there a unique Android device ID?
Do Android devices have a unique id, and if so, what is a simple way to access it via Java?
Answer: Is there a unique Android device ID?
Check for SystemInfo.deviceUniqueIdentifier
Documentation: http://docs.unity3d.com/Documentation/ScriptReference/SystemInfo-deviceUniqueIdentifier.html
A unique device identifier. It is guaranteed to be unique for every…
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uniqueIdentifier - Deprecated - Workaround - iOS5
As you perhaps have heard about the fact that the uniqueIdentifier property of the UIDevice class of the iOS will become deprecated in iOS5, you may ask yourself : "What about my push notifications, etc...?
Here's the way! Since iOS 2.0 (it was not named iOS at this time). So since 2.0 it exists a way to identify your device and application uniquely. So this is the way Apple wanted you to code.
- (NSString *)uniqueIdentifier:(NSString *)prefix { NSString *result = nil; CFUUIDRef uuid = nil; CFStringRef uuidStr = nil; uuid = CFUUIDCreate(NULL); assert(uuid != NULL); uuidStr = CFUUIDCreateString(NULL, uuid); assert(uuidStr != NULL); result = [NSTemporaryDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"%@-%@", prefix, uuidStr]]; assert(result != nil); CFRelease(uuidStr); CFRelease(uuid); return result; }
