They use database-generated primary key values for the ID attribute.
它们为ID属性使用数据库生成的主键值。
System authorization ID: the primary trust attribute is the authorization ID used for the connection.
系统授权id：首要的信任属性是用于连接的授权id。
If the target is an attribute reference: the primary expression in the reference is evaluated.
如果目标是一个属性引用：引用中的主元表达式被求值。
If the target is an attribute reference: the primary expression in the reference is evaluated.
如果目标是一个属性引用：引用中的主元表达式被求值。
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