關於「SQL Server add unique index」標籤，搜尋引擎有相關的訊息討論：

Create Unique Indexes - SQL Server | Microsoft Learnlearn.microsoft.com › ... › CreateCREATE INDEX (Transact-SQL) - SQL Server - Microsoft Learnlearn.microsoft.com › ... › Statements › CREATESQL CREATE UNIQUE INDEX - W3Schoolswww.w3schools.com › sql › sql_ref_create_unique_inde