The application never knows what value is put into the primary key column after running the INSERT statement.
在运行insert语句之后，应用程序将永远都不知道放入了主键列中的是什么值。
On Linux and UNIX platforms, a NULL value defaults to the primary group of the instance owner, which by default after an installation only contains the user ID of the instance owner.
在Linux和UNIX平台上，null值被缺省地赋给实例所有者的主组，完成安装后，缺省情况下这个组只包含用户ID和实例所有者。
Objective To evaluate the value of bile duct drainage using ureter catheter through cystic duct remnant with primary closure of the common bile duct (CBD) incision after CBD exploration.
目的评价经胆囊管残端输尿管导管胆道引流在胆总管探查、胆管一期缝合术中的应用价值。
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