摘要: This query generated a single result set with the aggregates for all grouping sets. Even though the above query works as you expected, it has two main 阅读全文
posted @ 2021-04-07 23:18 邱明成 阅读(644) 评论(0) 推荐(0) 编辑
摘要: 第一节、lex和yacc是什么? lex 代表 lexical analyzar(词法分析器),yacc 代表 yet another compiler compiler(编译器代码生成器)。lex和yacc在UNIX下分别叫flex和bison. 可以搜索到很多介绍flex&bison的文章,但这 阅读全文
posted @ 2021-04-07 16:28 邱明成 阅读(5541) 评论(0) 推荐(0) 编辑