#Apply
Tags: 5 posts
November 28, 2025
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6 min read
pandas groupby() — A Practical Guide
pandas groupby() — A Practical Guide What is groupby()? groupby() splits a DataFrame into buckets based on one or more column values, lets you run a function on each bucket independently, then stitches all the results back together into one …
December 1, 2019
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1 min read
Hackerrank SQL - Aggregation
Following problems are discussed here. To solve the same, please visit hackerrank website{:target="_blank"}.
Weather Observation Station 17 Weather Observation Station 18 Weather Observation Station 19 Weather Observation Station 20 …
December 1, 2019
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2 min read
Hackerrank SQL - Advanced Select
Following problems are discussed here. To solve the same, please visit hackerrank website{:target="_blank"}.
New Companies Binary Tree Nodes Occupations The PADS Type of Triangle New Companies select company.company_code, company.founder, …
April 23, 2019
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1 min read
Applying functions over pandas dataframe using apply, applymap and map
Importing Packages and Datasets import pandas as pd import numpy as np data = pd.DataFrame(np.random.rand(4, 3)*100, columns=['Physics','Çhemistry','Maths'], index = ['Student 1', 'Student 2','Student …
January 1, 2019
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2 min read
T-SQL - Working with subqueries and APPLY
Note : The following scripts are the part of the course on edx titled as: Querying Data with Transact-SQL - Querying Data with Transact-SQL
These queries works on AdventureWorks database and information regarding the same
can be accessed by visiting …