mysql常考点

红太狼 2022-10-13 05:13 132阅读 0赞

## 1、limit ##

[详情连接][Link 1]  
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## 2、去重 distinct ##

[详情连接][Link 2]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTY2NTYzNw_size_16_color_FFFFFF_t_70 1]

## 3、between and ##

[详情][Link 3]  
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## 4、嵌套查询 ##

[详情][Link 4]  
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## 5、左连接，右连接 ##

[详情][Link 5]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTY2NTYzNw_size_16_color_FFFFFF_t_70 4]

## 6、分组 grop by … having ##

[详情][Link 6]  
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## 7、倒序 order by （一般和limit共用 取前几名） desc（加desc 是倒序，不加是顺序） ##

[详情][Link 7]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTY2NTYzNw_size_16_color_FFFFFF_t_70 6]

## 8、count、sum、avg ##

## sql经典面试题 ##

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https://blog.csdn.net/yeewingho/article/details/106161280?utm\_source=app&app\_version=4.9.3&code=app\_1562916241&uLinkId=usr1mkqgl919blen

[Link 1]: https://blog.csdn.net/lanyang123456/article/details/57522471?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522162555214816780274169137%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=162555214816780274169137&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduend~default-1-57522471.pc_search_result_control_group&utm_term=mysql%20limit&spm=1018.2226.3001.4187
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[Link 2]: https://blog.csdn.net/zhangzehai2234/article/details/88361586?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522162555275616780265442335%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=162555275616780265442335&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduend~default-1-88361586.pc_search_result_control_group&utm_term=mysql%E7%9A%84distinct%E7%94%A8%E6%B3%95&spm=1018.2226.3001.4187
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[Link 3]: https://blog.csdn.net/qq_31625935/article/details/89017212?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522162555311316780269865062%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=162555311316780269865062&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduend~default-1-89017212.pc_search_result_control_group&utm_term=mysql%20between%20and%20&spm=1018.2226.3001.4187
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[Link 4]: https://blog.csdn.net/m0_38061639/article/details/82872705?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522162555306916780264082747%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=162555306916780264082747&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduend~default-2-82872705.pc_search_result_control_group&utm_term=mysql%20%E5%B5%8C%E5%A5%97%E6%9F%A5%E8%AF%A2&spm=1018.2226.3001.4187
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[Link 5]: https://blog.csdn.net/plg17/article/details/78758593?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522162555301716780269814267%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=162555301716780269814267&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduend~default-1-78758593.pc_search_result_control_group&utm_term=mysql%E5%B7%A6%E8%BF%9E%E6%8E%A5%E5%8F%B3%E8%BF%9E%E6%8E%A5&spm=1018.2226.3001.4187
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[Link 7]: https://blog.csdn.net/u011277123/article/details/78913361?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522162555253216780262575333%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=162555253216780262575333&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduend~default-2-78913361.pc_search_result_control_group&utm_term=mysql%E7%9A%84order%20by%E7%94%A8%E6%B3%95&spm=1018.2226.3001.4187
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