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RSS订阅原创 tesserocr安装错误
问题描述： 'cinttypes' file not found解决方法：CC=clang XCC=clang++ CPPFLAGS="-stdlib=libc++ -DUSE_STD_NAMESPACE -mmacosx-version-min=10.8" pip install tesserocr
2019-01-28 21:39:41
343
原创 beautifulsoup运行错误
问题描述：bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library?解决方法：conda install -c anaconda lxml
2019-01-28 21:29:05
291
原创 Mac安装OCR问题解决
问题描述：>>> import tesserocr!strcmp(locale, "C"):Error:Assert failed:in file baseapi.cpp, line 209Illegal instruction: 4解决方案：在每次调用tesserocr之前加入以下内容>>> import locale>>> ...
2019-01-27 20:02:29
636
原创 leetcode刷题196
题目描述解法代码DELETE FROM Person WHERE Id IN (SELECT a.Id FROM (SELECT P1.Id FROM Person AS P1,Person AS P2 WHERE P1.Id>P2.Id AND P1.Email=P2.Email) AS a);SQL知识点删除数据-DELETE FROM...
2019-01-01 21:18:40
147
原创 leetcode刷题183
题目描述解法代码SELECT Customers.Name AS Customers FROM Customers LEFT JOIN Orders ON Customers.ID=Orders.CustomerId WHERE CustomerId is NULL;SQL知识点外联结-OUTER JOIN
2019-01-01 19:35:11
169
原创 leetcode刷题182
题目描述解法代码SELECT Email FROM Person GROUP BY Email HAVING COUNT(*)>1;SQL知识点数据分组-GROUP BY过滤分组-HAVING
2019-01-01 16:46:56
168
原创 leetcode刷题181
题目描述解法代码SELECT E1.Name AS Employee FROM Employee AS E1,Employee AS E2 WHERE E1.ManagerId=E2.Id AND E1.Salary>E2.Salary;SQL知识点自联结
2019-01-01 16:09:44
222
原创 leetcode刷题175
题目描述实现代码SELECT FirstName, LastName, City, State FROM Person LEFT OUTER JOIN Address ON Person.PersonId = Address.PersonId;SQL知识点外联结-OUTER JOIN
2019-01-01 14:42:01
151
原创 MySQL 学习笔记（一）
System: macOs 10.12.6SQL installation package: mysql-8.0.13-macos10.14-x86_64Learning material: MySQL Crash CourseDownloads and Support in the book: mysql_scripts.zipStart MySQL in terminal:mysql...
2018-11-25 11:05:15
203
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