Quiz Library

#subqueries #sql #filtering

SQL Subqueries: Queries Within Queries

Practice writing and interpreting SQL subqueries, including scalar, correlated, and derived table subqueries. This quiz tests your ability to nest queries effectively to solve real-world data problems.

#joins #sql #data-analysis

SQL Joins: Combining Tables Like a Pro

Test your understanding of SQL JOIN types and how they combine rows from multiple tables. This quiz covers INNER, LEFT, RIGHT, FULL OUTER, and CROSS joins with practical scenarios.

Retrieving Data

Interview style multiple choice questions

#retrieving-data

SQL functions

These cover common aggregate, string, and handling functions.

#sql #sql-functions

Truncating Dates

Quiz for lesson: Truncating Dates

Pattern Matching (LIKE, ILIKE, Regex)

Quiz for lesson: Pattern Matching (LIKE, ILIKE, Regex)

DISTINCT & DISTINCT ON

Quiz for lesson: DISTINCT & DISTINCT ON

medium java script

JavaScript Core Mechanics: Scope, Promises, and Objects

Deepen your understanding of core JavaScript execution concepts such as closures, hoisting, prototypal lookup, and async behavior.

SQL Data Modification: INSERT, UPDATE & DELETE Mastery

Practice writing and reasoning about SQL Data Manipulation Language (DML) statements. This quiz covers inserting, updating, and deleting records safely and effectively across real-world scenarios.

SQL Subqueries: Queries Within Queries

SQL Joins: Combining Tables Like a Pro

Test your understanding of SQL JOIN types and how they combine rows from multiple tables. This quiz covers INNER, LEFT, RIGHT, FULL OUTER, and CROSS joins with practical scenarios.

Retrieving Data

Interview style multiple choice questions

SQL functions

These cover common aggregate, string, and handling functions.