如果不是engineer方向，就data scientist的话，一般不考算法。但是长远来看，刷刷算法对data scientist有好...
Should we even treat missing values is another important point to consider? If 80% of the values for a variable are missing then you may drop the variable instead of treating the missing values. Deleting the observation...
If we don’t rotate the components, the effect of PCA will diminish and we’ll have to select more number of components to explain variance in the data set. BA Interview Question & Answer Write a query in SQL to count the number of available rooms for each block in each floor. Answer:...
Even if one subtree is none while the other is not, you don't need to print anything for the none subtree but still need to leave the space as large as that for the other subtree. However, if two subtrees are none, then you don't need to leave space for both of them. Each unus...
Explain what is the criteria for a good data model? LeetCode Question Not Boring Movies X city opened a new cinema, many people would like to go to this cinema. The cinema also gives out a poster indicating the movies’ ratings and deions. Please write a SQL query to output movies with...
在进行大批量的字符串反转,倘若我使用之前学过的双指针或for循环的方式,前者直接修改了原始数据,后者需要确定字符串的原始规模,循环代价特别大。 HelloWorld NiHaoNeking 一次处理10个字符:先对10个字符内部进行倒叙,再用Stack进行弹出 dlroWolleH gnikeNoaHiN ...
| 2 | Science | fiction | 8.5 | | 3 | irish | boring | 6.2 | | 4 | Ice song | Fantacy | 8.6 | | 5 | House card| Interesting| 9.1 | +---+---+---+---+ 查找id 为奇数,并且 description 不是 boring 的电影,按 rating 降序。 +---+---+---+---+ | id | movie |...
AddressId is the primary key column for this table. 查找FirstName, LastName, City, State 数据,而不管一个用户有没有填地址信息。 Solution 涉及到 Person 和 Address 两个表,在对这两个表执行连接操作时,因为要保留 Person 表中的信息,即使在 Address 表中没有关联的信息也要保留。此时可以用左外连接...
Leetcode-1234 Replace The Substring For Balanced String c++, python3 Sliding Window O(N) O(1) - Leetcode-3439 Reschedule Meetings For Maximum Free Time I c++, python3 Sliding Window O(N) O(N) - Leetcode-2904 Shortest And Lexicographically Smallest Beautiful String c++, python3 Sliding Wind...
The retrieval process also uses the embedding function mentioned earlier. First, the question is embedded into a vector, and then the vector database is searched for relevant data. It's important to note that the question may not always be the one provided by the student. As mentioned before...