set column as unique in sql server

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Elena
13 Apr 2016
1ALTER TABLE Persons
2ADD UNIQUE (ID);
3
source
Eduardo
11 Feb 2019
1USE AdventureWorks2012;  
2GO  
3CREATE TABLE Production.TransactionHistoryArchive4  
4 (  
5   TransactionID int NOT NULL,   
6   CONSTRAINT AK_TransactionID UNIQUE(TransactionID)   
7);   
8GO  
9
10
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