学校有210人参加运动会，参加100米赛跑的男生有50人，女生有60人，参加跳远的女生有70，男生有80人，这两个项目都参加的男生25人，问只参加100米赛跑但不参加跳远的女生多少人？()

ary FROM department d INNER JOIN employee e ON d.deptno = e.deptnoA database administrator wishes to store this query within the database. Which of the following database objects can be used to accomplish this？（）

A.Alias

B.View

C.Schema

D.Trigger

A.Instance

B.Table space

C.System catalog

D.Schema repository

A．Sequence

B．Schema

C．Group

D．View

A．View

B．Table

C．Schema

D．Buffer pool

A．View

B．Table

C．Routine

D．Package

A.View

B.Catalog Table

C.Stored Procedure

D.Global Temporary Table

A.Foreign key references cannot cross schema boundaries.

B.A DB2 user must be created before a schema with the same name can be created.

C.If no schema is specified when an object is created, the default schema PUBLIC is used.

D.A schema enables the creation of multiple objects in a database without encountering namespace collisions.

A. All objects in the database

B. Tables owned by SYS and SYSTEM

C. Data dictionary tables

D. NCHAR columns

E. CHAR columns

A、photos and drawings

B、objects and models

C、video

D、powerpoint

A．View

B．Alias

C．Table

D．Package