oracle刪除主鍵約束和索引 oracle怎么添加刪除主鍵約束？
oracle怎么添加刪除主鍵約束？Add constraint語句格式：alter table name Add constraint primary key constraint name prim
oracle怎么添加刪除主鍵約束？
Add constraint語句格式：alter table name Add constraint primary key constraint name primary key（主鍵列名表序列）例如：alter table course table Add constraint PKxhukc primary key（學(xué)號，課程號）刪除約束語句格式：alter table table name DROP constraint primary key constraint name，如：alter table course table DROP constraint PK_xh_ukc