{"msg":"第五节 应用系统构建","code":200,"data":{"currentIndex":null,"examId":null,"examTime":null,"questionList":[{"id":"796234413099732993","title":"将Teachers表的查询权限授予用户U1和U2,并允许该用户将此权限授予其他用户。实现此功能的SQL语句如下（44）。","analyze":"本题考查数据库并发控制方面的基础知识。<br> 一般授权是指授予某用户对某数据对象进行某种操作的权利。在SQL语言中，DBA及拥有权限的用户可用GRANT语句向用户授权。GRANT语句格式如下：<br> <img width=\"618\" height=\"51\" src=\"https://image.chaiding.com/ruankao/4247a1b4d980c72c862fdb3d2ef8b71f.jpg?x-oss-process=style/ruankaodaren\" alt=\"\"><br> 其中，PUBLIC参数可将权限赋给全体用户；WITH GRANT OPTION表示获得了权限的用户还可以将权限赋给其他用户。","multi":0,"questionType":1,"answer":"C","chooseItem":["796234414089588737"],"itemList":[{"id":"796234414026674177","questionId":"796234413099732993","content":" GRANT SELECT ON TABLE Teachers TO U1，U2 WITH PUBLIC","answer":0,"chooseValue":"A"},{"id":"796234414064422913","questionId":"796234413099732993","content":" GRANT SELECT TO TABLE Teachers ON Ul, U2 WITH PUBLIC","answer":0,"chooseValue":"B"},{"id":"796234414089588737","questionId":"796234413099732993","content":" GRANT SELECT ON TABLE Teachers TO Ul, U2 WITH GRANT OPTION;","answer":1,"chooseValue":"C"},{"id":"796234414114754561","questionId":"796234413099732993","content":" GRANT SELECT TO TABLE Teachers ON Ul, U2 WITH GRANT OPTION;","answer":0,"chooseValue":"D"}],"userAnswer":null,"userChooseItem":null,"answerCorrect":null,"userCollect":null}]}}