unique constraint

常見(jiàn)例句

雙語(yǔ)例句

• The unique constraint is created in the database when you save the table.
  當(dāng)保存表時(shí)，將在數(shù)據(jù)庫(kù)中創(chuàng)建該唯一約束。
• This clause is not allowed if the column is specified in the primary key, or in a unique constraint of the table (SQLSTATE 42831).
  如果表的主鍵或惟一性約束中指定了這個(gè)列，那么不允許使用這個(gè)子句（SQLSTATE 42831）。
• The column 'CITY' in the OFFICE_INFO nickname is unique and hence a unique constraint has been defined on the nickname OFFICE_INFO on column CITY as follows
  OFFICE_INFO 昵稱中的列 'CITY' 是惟一的，因此在列 CITY 上定義了昵稱 OFFICE_INFO 的惟一約束，如下所示

權(quán)威例句

• The twenties, possibly alone among the middle decades of life, are passionately celebrated in fiction and memoirs, and the celebrations tend to share a style that is personal, specific, cliquish, pastiched, breathless, often bibulous, and flagrantly confessional—the voice of early mastery without mature constraint, self-discovery at a moment when each revelation seems unique.
  NEWYORKER: Semi-Charmed Life
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