関連ワード:  sql server constraint multiple columns unique    sql server constraint two columns unique    sql server add unique constraint multiple columns    sql server unique key constraint multiple columns    sql server create table unique constraint multiple columns    ms sql server unique constraint multiple columns    sql server check constraint unique multiple columns    sql server unique constraint across multiple columns    sql server create unique constraint on multiple columns    sql server alter table add unique constraint multiple columns  
結果 : sql server constraint multiple columns unique