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Database Tutorials and Administration Guides

Explore database tutorials including SQL, MySQL, PostgreSQL, MongoDB, and database administration techniques for performance and scalability.

The Databases section helps you learn database management and optimization techniques.

Databases are essential for storing and managing application data efficiently. This category includes tutorials on SQL, MySQL, PostgreSQL, and NoSQL databases.

You may also explore Programming for application integration.

124 articles

Database tutorials illustration with SQL tables, server cylinders, and data connections
databases

Master SQL CASE Statement: Don't Just Be a Beginner

Unlock the full potential of your database with our expert guide on SQL Case. Learn potent strategies to navigate data complexities and revolutionize your analytical abilities. Transform the way you work with data for …

Falguni Thakker21 min read
databases

Use Triggers in SQL to avoid Database Disasters

Boost your database’s security by implementing Triggers in SQL effectively, ensuring safe and secure data management practices.

Deepak Prasad15 min read
databases

Find and Delete Duplicate Rows in SQL

Learn how to find and delete duplicate rows in SQL or completely delete records in SQL including Joins using different methods. You can also automate the duplicate removal.

Falguni Thakker17 min read
databases

How to Query Data between two Dates in SQL?

Querying data effectively is a fundamental skill when working with SQL databases. One common, yet crucial, aspect of this is understanding how to query data

Falguni Thakker10 min read
databases

How the Hell I use SQL IF Statement in SELECT

Dive deep and tame the powerful beast of sql if statement in select, mastering the art of dynamic and conditional SQL queries with ease and precision.

Falguni Thakker9 min read
databases

5 Functions to Efficiently Roundup in SQL?

Explore the dynamic capabilities of ROUNDUP in SQL to enhance numeric data precision and optimize query performance. Elevate your database operations with the mastery of ROUNDUP in SQL.

Falguni Thakker8 min read
databases

Unlock the Power of SQL UPDATE with Advanced Techniques

Learn to turbocharge your databases with optimization techniques and best practices that will make your SQL UPDATE statements more powerful and efficient.

Falguni Thakker14 min read
databases

Learn to use SQL ORDER BY like a PRO with Our Guide

Enhance your SQL queries with advanced SQL ORDER BY techniques. Elevate the efficiency and functionality of your database interactions.

Falguni Thakker11 min read
databases

Use SQL Ranking Functions Like a PRO: Don't be a Rookie

Explore the transformative potential of SQL Ranking Functions to revolutionize your database queries and analytics. Dive deep into robust strategies, avoid common mistakes, and unlock powerful, dynamic insights from your …

Falguni Thakker12 min read
databases

SQL TRUNCATE Table : Potent but Risky Command

Unlock the powerful capabilities of SQL Truncate Table to optimize database performance. Discover essential insights, best practices, and crucial considerations to master this remarkable SQL command and to use it …

Falguni Thakker10 min read
databases

How to Precisely Get Date from DateTime SQL?

Discover powerful and efficient methods to get date from DateTime SQL with our insightful guide. Explore expert techniques to enhance your SQL queries, ensuring precise and reliable results when retrieving dates.

Falguni Thakker8 min read
databases

SOLVED: SQL ambiguous column name [5 Possible Causes]

ambiguous column name join, sql ambiguous column name, ambiguous column name, ambiguous column name sql, column reference is ambiguous, ms sql ambiguous column name, sql query ambiguous column name

Falguni Thakker7 min read
databases

SQL CONTAINS Explained

we have covered the SQL Contains which is used to do the searching operation for a word or phrase or nearby word on a full-text index, we have started with an overview of SQL Contains, the difference between SQL LIKE and …

Falguni Thakker13 min read
databases

Using SQL GROUP BY with Multiple Columns [SOLVED]

Learn to use SQL GROUP BY Multiple Columns (Two, Three or More) using different methods such as using with HAVING BY, ORDER BY, Joins, ROLLUP and CUBE.

Falguni Thakker13 min read
databases

Master the Pandas Dropna() Method [In-Depth Tutorial]

Learn how to effectively use the Pandas dropna() method to eliminate NaN/Null values in your dataframe. Enhance your data cleaning skills now.

Deepak Prasad14 min read
databases

Mastering pandas.read_csv() [Basics to Advanced]

read_csv() with first row as header, with custom index, with new column names, with skip rows, Read first N rows from csv to pandas DataFrame, Import specific columns from csv to pandas DataFrame using read_csv(), …

Deepak Prasad13 min read
databases

Convert DataFrame to CSV in Python [With Best Practices]

In this tutorial we will cover multiple scenarios to convert pandas dataframe to csv file. with or without index, with oir without header, specifying column name, convering only specific columns

Deepak Prasad14 min read
databases

Pandas Iterate Over Rows with Best Practices

We can iterate over rows in the Pandas DataFrame using the following methods, Using index attribute, Using loc[] function, Using iloc[] function, Using iterrows() method, Using itertuples() method

Deepak Prasad9 min read
databases

Add Empty Column(s) to Pandas DataFrame [6 Methods]

Discover methods to add empty columns to a pandas DataFrame with ease. From using bracket notation to the assign() method, delve into the various techniques and best practices for efficiently enhancing your DataFrame's …

Deepak Prasad13 min read
databases

Pandas to_datetime() Usage Explained [Practical Examples]

Learn about pandas to_datetime using multiple examples to convert String, Series, DataFrame into DateTime Index. Modify the output format of the to_datetime, Handle exceptions, access day, month and year field from the …

Deepak Prasad15 min read
databases

How to EFFICIENTLY print entire DataFrame?

In this article we discussed how to print entire dataframe in following formats: Markdown format, ,psql format, plain-text format, RST format, github format, pretty format, tsv format, HTML format

Deepak Prasad13 min read
databases

Using SQL UPDATE from SELECT statement

There are 3 different methods to use SQL UPDATE from Select. Using INNER Join, Using Merge statement and using sub query statement.

Falguni Thakker11 min read
databases

7 ways to filter pandas DataFrame by column value

Learn how to filter pandas dataframe by column using various methods. Dive into Boolean indexing, the query method, string operations, lambda functions, and handling missing values for efficient and targeted data …

Deepak Prasad11 min read
databases

SQL String Concatenation

In this comprehensive article, we will delve into the world of SQL string concatenation, exploring its fundamentals, various techniques, and best practices to

Falguni Thakker9 min read
databases

SQL Remove Characters from String with Examples

SQL remove characters from string from left side, right side. Remove first character, remove last character, remove last n characters, remove specific characters, remove characters from beginning or end of the string in …

Falguni Thakker10 min read
databases

How to PROPERLY insert multiple rows in SQL?

Learn how to insert multiple rows in SQL with ease. Discover batch inserts and the power of INSERT INTO statements with UNION ALL. Streamline your data insertion process and optimize your SQL queries.

Falguni Thakker8 min read
databases

SQL LEFT JOIN Explained with Practical Examples

The SQL LEFT JOIN clause allows you to query data from multiple tables. It returns all rows from the left table and the matching rows from the right table.

Deepak Prasad11 min read
databases

How to select row with max value in SQL?

There are two ways to find and select rows with maximum value in a column. 1. Sub query with Max() Function 2. Left Outer join

Falguni Thakker8 min read
databases

SQL IN Operator Explained [10 Practical Examples]

SQL IN with Numeric list of values, with String list of values, with Date list of values, with Subquery, with columns, Multiple SQL IN in a single query, with Update, statement, SQL IN with Delete statement, SQL IN with …

Falguni Thakker8 min read
databases

How to UPDATE statement with JOIN in SQL?

A SQL update with join is a query used to update the data in a table based on data in another related table. The join is used to associate records in one

Falguni Thakker7 min read