Pandas SQL Query: Display the name, salary and department number for those employees whose first name starts with the letter 'S'
Pandas HR database Queries: Exercise-6 with Solution
Write a Pandas program to display the first, last name, salary and department number for those employees whose first name starts with the letter 'S'.
EMPLOYEES.csv
DEPARTMENTS.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[:1]=='S']
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 Steven King 24000 90.0 Shelli Baida 2900 30.0 Sigal Tobias 2800 30.0 Shanta Vollman 6500 50.0 Steven Markle 2200 50.0 Stephen Stiles 3200 50.0 Sarath Sewall 7000 80.0 Sundar Ande 6400 80.0 Sundita Kumar 6100 80.0 Sarah Bell 4000 50.0 Samuel McCain 3200 50.0 Susan Mavris 6500 40.0 Shelley Higgins 12000 110.0
Equivalent SQL Syntax:
SELECT first_name, last_name, salary, department_id FROM employees WHERE first_name LIKE 'S%';
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 and last name, and department number for all employees whose last name is "McEwen".
Next: Write a Pandas program to display the first, last name, salary and department number for those employees whose first name does not contain the letter ‘M’.
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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