मुख्य सामग्री पर जाएं

होम Python

कोर्स

Introduction to Databases in Python

मध्यमकौशल स्तर

अपडेट किया गया 08/2024

In this course, you'll learn the basics of relational databases and how to interact with them.

मुफ़्त में पाठ्यक्रम शुरू करें

PythonData Manipulation

4 घंटे

20 वीडियो

66 अभ्यास

5,550 XP

100K+

उपलब्धि का प्रमाण पत्र

अपना मुफ़्त खाता बनाएं

Google के साथ जारी रखें अधिक विकल्प दिखाएँ

या

जारी रखने पर, आप हमारी उपयोग की शर्तें, हमारी गोपनीयता नीति को स्वीकार करते हैं और यह भी कि आपका डेटा संयुक्त राज्य अमेरिका में संग्रहीत किया जाता है।

हजारों कंपनियों के शिक्षार्थियों द्वारा पसंद किया गया

टीम को ट्रेनिंग देना चाहते हैं?

व्यवसाय के लिए आज़माएँ

पाठ्यक्रम विवरण

In this course, you'll learn the basics of using SQL with Python. This will be useful because databases are ubiquitous and data scientists, analysts, and engineers must interact with them constantly. The Python SQL toolkit SQLAlchemy provides an accessible and intuitive way to query, build, and write to essential databases, including SQLite, MySQL, and PostgreSQL.

पूर्व आवश्यकताएं

Intermediate Python

1

Basics of Relational Databases

In this chapter, you’ll get acquainted with the fundamentals of relational databases and the relational model for database management. You will learn how to connect to a database and interact with it by writing basic SQL queries, both in raw SQL as well as SQLAlchemy, which provides a Pythonic way of interacting with databases.

Introduction to Databases

Relational model

Connecting to your database

Engines and connection strings

Autoloading Tables from a database

Viewing Table details

Introduction to SQL queries

Selecting data from a Table: raw SQL

Selecting data from a Table with SQLAlchemy

Handling a ResultSet

Congratulations!

अध्याय शुरू करें

2

Applying Filtering, Ordering and Grouping to Queries

In this chapter, you will build on your database knowledge by writing more nuanced queries that allow you to filter, order, and count your data—all within the Pythonic framework provided by SQLAlchemy.

Filtering and targeting data

Connecting to a PostgreSQL database

Filter data selected from a Table - Simple

Filter data selected from a Table - Expressions

Filter data selected from a Table - Advanced

Ordering query results

Ordering by a single column

Ordering in descending order by a single column

Ordering by multiple columns

Counting, summing, and grouping data

Counting distinct data

Count of records by state

Determining the population sum by state

SQLAlchemy and pandas for visualization

ResultsSets and pandas DataFrames

From SQLAlchemy results to a plot

अध्याय शुरू करें

3

Advanced SQLAlchemy Queries

In this chapter, you will learn to perform advanced—and incredibly useful—queries that enable you to interact with your data in powerful ways.

Calculating values in a query

Connecting to a MySQL database

Calculating a difference between two columns

Determining the overall percentage of women

SQL relationships

Automatic joins with an established relationship

More practice with joins

Working with hierarchical tables

Using alias to handle same table joined queries

Leveraging functions and group_bys with hierarchical data

Handling large ResultSets

Working on blocks of records

अध्याय शुरू करें

4

Creating and Manipulating your own Databases

In the previous chapters, you interacted with existing databases and queried them in different ways. Now, you will learn how to build your own databases and keep them updated.

Creating databases and tables

Creating tables with SQLAlchemy

Constraints and data defaults

Inserting data into a table

Inserting a single row

Inserting multiple records at once

Loading a CSV into a table

Updating data in a table

Updating individual records

Updating multiple records

Correlated updates

Deleting data from a database

Deleting all the records from a table

Deleting specific records

Deleting a table completely

अध्याय शुरू करें

5

Putting it all together

Bring together all of the skills you acquired in the previous chapters to work on a real-life project. From connecting to a database and populating it, to reading and querying it.

Census case study

Setup the engine and metadata

Create the table to the database

Populating the database

Reading the data from the CSV

Load data from a list into the Table

Querying the database

Determine the average age by population

Determine the percentage of population by gender and state

Determine the difference by state from the 2000 and 2008 censuses

Congratulations!

अध्याय शुरू करें

Introduction to Databases in Python

पाठ्यक्रम
पूर्ण

उपलब्धि का प्रमाण पत्र अर्जित करें

इस प्रमाण पत्र को अपनी LinkedIn प्रोफ़ाइल, रिज्यूमे या CV में जोड़ें
इसे सोशल मीडिया पर और अपनी प्रदर्शन समीक्षा में साझा करेंअभी नामांकन करें

व्यवसाय के लिए

2 या अधिक लोगों को प्रशिक्षण दे रहे हैं?

अपनी टीम को सभी सुविधाओं सहित पूर्ण DataCamp प्लेटफॉर्म तक पहुंच प्रदान करें।

इंस्ट्रक्टर

Jason Myers

Jason Myers

Co-Author of Essential SQLAlchemy and Software Engineer

सहयोगी

कोर्स संसाधन

Census (CSV)डेटासेट

Census (SQLite)डेटासेट

Employees (SQLite)डेटासेट

19 मिलियन से अधिक शिक्षार्थियों के साथ जुड़ें और आज ही Introduction to Databases in Python शुरू करें!

अपना मुफ़्त खाता बनाएं

Google के साथ जारी रखें अधिक विकल्प दिखाएँ

या

जारी रखने पर, आप हमारी उपयोग की शर्तें, हमारी गोपनीयता नीति को स्वीकार करते हैं और यह भी कि आपका डेटा संयुक्त राज्य अमेरिका में संग्रहीत किया जाता है।

मोबाइल के लिए DataCamp के साथ अपने डेटा कौशल को बढ़ाएं

हमारे मोबाइल कोर्स और दैनिक 5 मिनट की कोडिंग चुनौतियों के साथ चलते-फिरते प्रगति करें।