Sql server alter primary key add column關於「SQL DROP primary key」標籤，搜尋引擎有相關的訊息討論：
How to Remove a Primary Key in SQL | LearnSQL.comlearnsql.com › cookbook › how-to-remove-a-primary-key...SQL Server: drop table primary key, without knowing its namestackoverflow.com › questions › sql-server-drop-table-pri...Delete Primary Keys - SQL Server - Microsoft Learnlea