What is Exploratory Data Analysis? Exploratory data analysis (EDA) is used by data scientists to analyze data sets and summarize their main characteristics and understand its main features, find patterns and discover how different parts of the data are connected. often employing data visualization methods. What is Exploratory Data Analysis? Exploratory Data Analysis [EDA] is […]
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SQL Developer: A Complete Career Guide: A prominent SQL Developer does far more than just write queries. The developers architect, optimize, and secure the entire data layer of an database application. SQL Developer: A Complete Career Guide: With the larger amount of data that companies store today, database management has become all the more important.
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Top 10 SQL Query Optimization Techniques – Do you want to speed up internal intel gathering, or ensure your customers don’t get bored and bounce? Let’s take a look at why you should be optimizing your SQL queries for better database management. Query Optimization in SQL is the process of refining queries for faster, more
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SQL CASE Statement – A Comprehensive Guide: The CASE statement in SQL is a conditional expression that enables us to incorporate conditional logic directly. The CASE statement goes through conditions and returns a value when the first condition is met (like an if-then-else statement). So, once a condition is true, it will stop reading and
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Database Normalization – Normal Forms 1NF 2NF 3NF Table Examples – Normal Forms are important for ensuring that data is structured logically, reducing redundancy, and maintaining data integrity. Database Normalization – Normal Forms 1NF 2NF 3NF: If a table is not properly normalized and has data redundancy(repetition) then it will not only consume extra memory
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Common Table Expression CTE in SQL – The WITH clause in MySQL is used to specify a Common Table Expression. CTE in SQL: A CTE is the result set of a query which exists temporarily and for use only within the context of a larger query. Much like a derived table, the result of a
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Types of Sampling Techniques in Data Analytics| What is Sampling? Data sampling techniques is a statistical method that involves selecting a part of a population of data to create representative samples. Let’s say we want to know the percentage of people who use iPhones in a city, for example. One way to do this is
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What Is a Data Analyst? A data analyst is a problem solver who prepares and analyzes data to provide organizations with insights that help them make better business decisions. In these organizations, the job of the data analyst is to assign a numerical value to these important business functions so performance can be assessed and
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Understanding SQL query order can help you diagnose why a query won’t run, and even more frequently will help you optimize your queries to run faster. What is SQL Order of Execution? SQL order of execution refers to the order in which the different clauses in the query are evaluated. It’s worth understanding because the
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SQL vs. PL/SQL: Structured Query Language (SQL) is a standard Database language that is used to create, maintain and retrieve the relational database. PL/SQL is a block-structured language that enables developers to combine the power of SQL with procedural statements. Project Scenario: Online Retail Order Processing System The Goal: Develop a backend system for an
