Pandas SQL Query: Display the name, salary and department number for those employees who holds a letter n as a 3rd character in their first name
Pandas HR database Queries: Exercise-19 with Solution
Write a Pandas program to display the first, last name, salary and department number for those employees who holds a letter n as a 3rd character in their first name.
EMPLOYEES.csv
Sample Solution :
Python Code :
import pandas as pd
employees = pd.read_csv(r"EMPLOYEES.csv")
departments = pd.read_csv(r"DEPARTMENTS.csv")
job_history = pd.read_csv(r"JOB_HISTORY.csv")
jobs = pd.read_csv(r"JOBS.csv")
countries = pd.read_csv(r"COUNTRIES.csv")
regions = pd.read_csv(r"REGIONS.csv")
locations = pd.read_csv(r"LOCATIONS.csv")
print("First name Last name Salary Department ID")
result = employees[employees['first_name'].str[2:3]=='n']
for index, row in result.iterrows():
print(row['first_name'].ljust(15),row['last_name'].ljust(15),str(row['salary']).ljust(9),row['department_id'])
Sample Output:
First name Last name Salary Department ID Nancy Greenberg 12000 100.0 Daniel Faviet 9000 100.0 Den Raphaely 11000 30.0 Renske Ladwig 3600 50.0 Randall Matos 2600 50.0 Nanette Cambrault 7500 80.0 Janette King 10000 80.0 Lindsey Smith 8000 80.0 Danielle Greene 9500 80.0 Sundar Ande 6400 80.0 Sundita Kumar 6100 80.0 Jonathon Taylor 8600 80.0 Winston Taylor 3200 50.0 Nandita Sarchand 4200 50.0 Jennifer Dilly 3600 50.0 Randall Perkins 2500 50.0 Vance Jones 2800 50.0 Donald OConnell 2600 50.0 Jennifer Whalen 4400 10.0
Equivalent SQL Syntax:
SELECT first_name,last_name, department_id FROM employees WHERE first_name LIKE '__n%';
Click to view the table contain:
Python Code Editor:
Structure of HR database :
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Previous: Write a Pandas program to display the first name, last name, salary and department number for those employees whose managers are hold the ID 120, 103 or 145.
Next: Write a Pandas program to display the first name, job id, salary and department for those employees not working in the departments 50,30 and 80.
What is the difficulty level of this exercise?
Python: Tips of the Day
Find current directory and file's directory:
To get the full path to the directory a Python file is contained in, write this in that file:
import os dir_path = os.path.dirname(os.path.realpath(__file__))
(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)
To get the current working directory use
import os cwd = os.getcwd()
Documentation references for the modules, constants and functions used above:
- The os and os.path modules.
- The __file__ constant
- os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
- os.path.dirname(path) (returns "the directory name of pathname path")
- os.getcwd() (returns "a string representing the current working directory")
- os.chdir(path) ("change the current working directory to path")
Ref: https://bit.ly/3fy0R6m
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