Test your understanding of SQL constraints and how they enforce data integrity in relational databases. This quiz covers primary keys, foreign keys, unique constraints, NOT NULL, CHECK, and DEFAULT values.

#sql #primary-key #foreign-key

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SQL DDL: Creating & Structuring Database Tables

Practice writing Data Definition Language (DDL) statements to create, modify, and constrain database tables. This quiz covers CREATE TABLE, ALTER TABLE, DROP, and key constraints like PRIMARY KEY, FOREIGN KEY, NOT NULL, UNIQUE, and DEFAULT.

#sql #data-integrity #ddl

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SQL Conditions, Filtering & Sorting Fundamentals

Practice the core SQL concepts used to filter, organize, and refine query results. This quiz covers WHERE conditions, ORDER BY, NULL handling, and logical operators.

#conditional-logic #order-by #comparison-operators

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SQL Distinct, Limits & Basic Data Retrieval

Practice retrieving unique records, limiting results, and understanding basic SQL query behavior. This quiz reinforces foundational querying skills used in everyday data tasks.

#distinct #limit-clause #data-retrieval

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SQL Basics: Writing Your First Queries

Get comfortable with the fundamental building blocks of SQL, including SELECT statements, filtering rows, and sorting results. This quiz is designed for absolute beginners taking their first steps with databases.

#sql #select #beginners

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SQL Aggregations & Grouping: Core Concepts

Practice writing SQL queries that summarize and group data using aggregate functions. This quiz covers COUNT, SUM, AVG, MIN, MAX, GROUP BY, and HAVING in real-world scenarios.

#aggregation #group-by #sql-clauses

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