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今后要使用excel中的VBA宏，但是一点开EXCEL显示： 在 WPS中宏需要VBA支持库， 在大佬的帮助下，成功解决该问题，在此奉上大佬的解决问题的链接：https://blog.csdn.net/weixin_44611574/article/details/91040722 阅读全文
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stops(id, name) route(num, company, pos, stop) stops id name route num company pos stop 1.How many stops are in the database. SELECT COUNT(DISTINCT(st 阅读全文
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teacher iddeptnamephonemobile 101 1 Shrivell 2753 07986 555 1234 102 1 Throd 2754 07122 555 1920 103 1 Splint 2293 104 Spiregrain 3287 105 2 Cutflower 阅读全文
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This tutorial introduces the notion of a join. The database consists of three tables movie , actor and casting . movie id title yr director budget gro 阅读全文
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game idmdatestadiumteam1team2 1001 8 June 2012 National Stadium, Warsaw POL GRE 1002 8 June 2012 Stadion Miejski (Wroclaw) RUS CZE 1003 12 June 2012 S 阅读全文
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World Country Profile: Aggregate functions This tutorial is about aggregate functions such as COUNT, SUM and AVG. An aggregate function takes many val 阅读全文
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This tutorial looks at how we can use SELECT statements within SELECT statements to perform more complex queries. namecontinentareapopulationgdp Afgha 阅读全文
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nobel yrsubjectwinner 1960 Chemistry Willard F. Libby 1960 Literature Saint-John Perse 1960 Medicine Sir Frank Macfarlane Burnet 1960 Medicine Peter M 阅读全文
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namecontinentareapopulationgdp Afghanistan Asia 652230 25500100 20343000000 Albania Europe 28748 2831741 12960000000 Algeria Africa 2381741 37100000 1 阅读全文
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1. 多行缩进 : 选中+Tab键 取消缩进： shift+ Tab键 2. 多行注释：ctrl + 1 注释取消：ctrl + 1 3. 跳转到指定行： ctrl + l [是字母l] 4.多行注释一般写Python代码介绍：ctrl +4 相应的取消：ctrl +5 阅读全文