标签：26 082 compound 考试题 statement clause query ORDER SELECT

26、Which two statements are true about the ORDER BY clause when used with a SQL statement containing a SET operator such as UNION? (Choose two.)

A. Column positions must be used in the ORDER BY clause

B. Only column names from the first SELECT statement in the compound query are recognized

C. The first column in the first SELECT of the compound query with the UNION operator is used by default to sort output in the absence of an ORDER BY clause

D. Each SELECT statement in the compound query must have its own ORDER BY clause

E. Each SELECT statement in the compound query can have its own ORDER BY clause

source : cuug

标签：26,082,compound,考试题,statement,clause,query,ORDER,SELECT
来源： https://www.cnblogs.com/alice9313/p/15905011.html

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。