题目内容

(1)打开考生文件夹下的数据库SPORT，首先永久删除该数据库中的temp表，然后将“金牌榜”、“获奖牌情况”和“国家”3个自由表加入该数据库中。(2)在表设计器中，为表“金牌榜”建立一个普通索引，索引名和索引表达式均为“金牌数”。(3)使用SQL语句为表“金牌榜”增加一个字段“奖牌总数”(整数型)，同时为该字段设置有效性规则：奖牌总数>=0。请将该SQL语句存储在文件one．prg中，否则不得分。(4)使用SQL语句更改表“金牌榜”所有记录的“奖牌总数”字段值，该值应为“金牌数”、“银牌数”、“铜牌数”3项之和。请将该SQL语句存储在文件two．prg中，否则不得分。

查看答案

搜索结果不匹配？点我反馈

更多问题

Below are some notices and signs from a trade exhibition. Explain what each one means using may, should, shouldn’t, must, mustn’t, don’t have to. PLEASE USE OTHER DOOR You shouldn’t use this door. MEETING ROOM 6 Knock and enter 1. No Photography in Main Hall 2. AUTHORIZED PERSONNEL ONLY 3. Present badges HERE (except staff) 4. REGISTER HERE 5. Events catalogue Please take one 6.

关于项目内部收益率，下列说法错误的是

A. 年平均收益与总投资的比
B. 内部收益率大于基准收益率的项目不可行
C. 项目内部收益率是净现值为0时的折现率
D. 项目内部收益率高表示项目获利机会大

Complete these statements by putting a verb (gerund or infinitive) into each gap. Are you able to repair the fault or not If not, I will go to another garage. It’s better ______ a small part of something big than a big part of something small.

Complete these statements by putting a verb (gerund or infinitive) into each gap. Are you able to repair the fault or not If not, I will go to another garage. I always tell a little joke or story before ______ my presentation.