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Explore technical documentation for technologies such as R programming, Java and MySQL. Learn syntax and best practices with concise guides and code examples.

R Docs

Graphic User Interfaces in R

Learn how to use R with command line interface or graphical tools like RStudio and R Commander. Interactive course available for detailed learning.

Data Types in R

Discover data types in R like scalars, vectors, matrices, data frames, and lists. Access vector elements and create matrices with consistent modes and lengths.

Bar Plots in R

Learn how to create barplots in R with the barplot() function. Customize using options like names.arg and horiz for effective data visualization.

Java Docs

while Keyword in Java

Learn about the while loop in Java - a control flow statement that repeats a code block while a condition is true. See syntax and examples.

switch Keyword in Java

Learn how to use the switch statement in Java to handle multiple conditional branches efficiently with this comprehensive guide.

abstract Keyword in Java

Learn about the Java abstract keyword, used to declare classes or methods that cannot be directly instantiated or must be implemented by subclasses.

MySQL Docs

MySQL ADD Keyword

Learn how to use the MySQL ADD keyword to modify tables by adding columns, indexes, or constraints efficiently, with practical examples and best practices for seamless database management.

MySQL AVG() Function

Learn how to use the MySQL `AVG()` function for calculating average values in numeric columns. Enhance your database analysis with practical examples and best practices.

MySQL FROM Clause

Learn how to effectively use the MySQL FROM clause to specify data sources in SQL queries like SELECT, UPDATE, and DELETE, with examples and best practices for optimal performance.

PostgreSQL Docs

PostgreSQL SELECT

Learn how to effectively use the PostgreSQL SELECT statement to query data, apply conditions, and sort results with practical examples and best practices for optimized database queries.

PostgreSQL CROSS JOIN

Discover how to use the PostgreSQL CROSS JOIN to create a Cartesian product of tables, generating all possible row combinations for comprehensive data analysis and reporting.

PostgreSQL ORDER BY

Learn how to use the PostgreSQL `ORDER BY` clause to sort query results by columns, enhancing data analysis with ascending or descending order for intuitive visualization.