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嵌入式SQL语句何时不必涉及到游标？何时必须涉及到游标？
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嵌入式SQL语句何时不必涉及到游标？何时必须涉及到游标？
时间：2022-03-05 17:25
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大学试题
工学
CMS专题
计算机软件水平考试
中级数据库系统工程师
答案解析
（1）INSERT、DELETE、UPDATE语句，查询结果肯定是单元组时的SELECT语句，都可直接嵌入在主程序中使用，不必涉及到游标。<br> （2）当SELECT语句查询结果是多个元组时，此时宿主语言程序无法使用，一定要用游标机制把多个元组一次一个地传送给宿主语言处理。
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