Answers for "use all to create a uniqie table for a column"

SQL
3

mysql set field unique

ALTER TABLE mytbl ADD UNIQUE (columnName);
Posted by: Guest on March-06-2020
1

unique constraint mssql

USE AdventureWorks2012;  
GO  
CREATE TABLE Production.TransactionHistoryArchive4  
 (  
   TransactionID int NOT NULL,   
   CONSTRAINT AK_TransactionID UNIQUE(TransactionID)   
);   
GO
Posted by: Guest on August-03-2020

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