SQL from Zero to Hero
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This track covers both fundamental and advanced SQL techniques, enabling confident data management, query optimization, and data analysis. It explores…
188
Chapters
24
Learning hours
316
Assignments
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Hva du vil lære
Retrieving data with SQL SELECT statement
Using aggregate functions for data summary
Joining tables with INNER, LEFT, RIGHT, FULL JOIN
Sorting data using ORDER BY clause
Grouping data with GROUP BY and HAVING
Understanding relational database design
Filtering data with WHERE clause
Creating nested subqueries for complex queries
Applying SQL functions for data manipulation
Learning track content
Hente Individuelle Kolonner
Hente Flere Kolonner
Hente Alle Kolonner
Hente Unike Rader
Begrensning av Resultater
Utfordring: Finn Befolkningen i Landene
Utfordring: Finn Alle Land
Utfordring: Finn Alle Land Med Deres ID-er
Utfordring: Finn Lands Hovedsteder
Utfordring: Finn Regionene Der Alle Land Er Lokalisert
Sortering av Data
Utfordring: Sortering Etter Befolkning
Sortering Etter Flere Kolonner
Utfordring: Dobbel-Sorteringsspørring
Spesifisere Sorteringsretning
Utfordring: Sorter Landene Etter Region og Hovedstad
Utfordring: Sorter Hovedsteder i Synkende Rekkefølge
Utfordring: Sorter Land i Stigende Rekkefølge
Utfordring: Finn Land, Deres ID-er og Deres Befolkning
Utfordring: Finn Alle Kontinenter og Sorter Dem i Stigende Rekkefølge
Bruk av WHERE-setningen
Utfordring: Sortering av Befolkning i Nord-Amerika
WHERE-setningens Operatorer
Utfordring: Befolkningsgrense-Spørring
Sjekke for et Verdiområde
Sjekke for Ingen Verdi
Bruk av AND-operatoren
Utfordring: Sortering av Europa-Regionen
Bruk av OR-Operatoren
Utfordring: Filter for Amerikanske Regioner
Bruk av NOT-Operatoren
Utfordring: Sortering av Hovedsteder Utenfor Europa
AVG()-Funksjonen
Utfordring: Valg av Overflateareal
COUNT()-Funksjonen
Utfordring: Kontinental Telling
MAX()-Funksjonen
MIN()-Funksjonen
Utfordring: Stort Gjennomsnittlig Overflateareal
SUM()-Funksjonen
Introduction to Subqueries
Subqueries in SELECT and WHERE Clauses
Challenge: Top Customers by Order Count
Challenge: Products Never Ordered
Challenge: Customers from Specific Cities with Orders
Challenge: Most Popular Product Category
Non-correlated vs Correlated Subqueries
Subqueries in FROM Clauses
Challenge: Recently Hired Employees
Challenge: Departments with Above-average Salaries
Challenge: Employees Without Recent Salary Increase
Challenge: Highest Paid Employee per Department
Subqueries for Aggregation and Filtering
Subqueries for Existence and Non-existence
Challenge: Most Active Members
Challenge: Books Borrowed in the Last Month
Challenge: Members with No Borrowings
Challenge: Most Popular Genre
Understanding INNER JOIN
Challenge: Find Customers with Orders
Exploring LEFT JOIN
Challenge: List All Customers and Their Orders
RIGHT and FULL OUTER JOIN in Action
Challenge: Orders Without Customers
Joining More Than Two Tables
Challenge: Employee Project Assignments
Self-Joins for Hierarchical Data
Challenge: Manager-Employee Relationships
Advanced Join Conditions
Challenge: Complex Assignment Matching
Challenge: Employees Without Projects
Dealing with NULLs in Joins
Join Performance and Optimization
Challenge: Optimize a Join Query
Real-World Join Scenarios
Challenge: Student Performance Dashboard
DBMS Overview
Difference between Relational and Non-relational Databases
Entity-Relationship Model
Entity-Relationship Model. Relationships
Structure. Primary Key and Foreign Key
Foreign Key Constraints. ON DELETE Options
Many-to-One and One-to-Many
One-to-One and Many-to-Many
Normalization
First Normal Form
Second Normal Form
Third Normal Form
Understanding CASE WHEN Syntax
Challenge: Categorize Sales Volume
Challenge: Regional Discount Flag
CASE WHEN in SELECT Clauses
Challenge: Price Tier Assignment
Challenge: Sales Performance Label
Nested and Multiple CASE WHEN Conditions
Challenge: Employee Bonus Eligibility
Challenge: Departmental Salary Bands
CASE WHEN with NULL and Missing Data
Challenge: Handle Missing Employee Data
Challenge: Custom Welcome Messages
CASE WHEN in WHERE Clauses
Challenge: Genre-Specific Movie Selection
Challenge: Blockbuster Filter
CASE WHEN in ORDER BY Clauses
Challenge: Custom Movie Ranking
Challenge: Release Year Priority
CASE WHEN with Aggregate Functions
Challenge: Customer Spending Analysis
Challenge: High-Value Transaction Count
CASE WHEN for Custom Reports
Challenge: Transaction Type Breakdown
Introduction to String Functions
Challenge: Standardize Customer Names
Challenge: Extract Email Domains
Advanced String Manipulation
Challenge: Mask Sensitive Information
Challenge: Clean Up City Names
Working with Dates and Times
Challenge: Calculate Order Age
Challenge: Find Late Deliveries
Advanced Date and Time Calculations
Challenge: Monthly Order Summary
Challenge: Predict Delivery Dates
Introduction to Numeric Functions
Challenge: Calculate Discounted Prices
Challenge: Find Low Stock Products
Advanced Numeric Operations
Challenge: Analyze Price Distribution
Challenge: Calculate Inventory Value
Introduction to Logical Functions
Challenge: Categorize Transactions
Challenge: Handle Missing Payment Methods
Advanced Logical Expressions
Challenge: Flag Suspicious Transactions
Challenge: Summarize Transaction Status
Understanding Null Functions
Challenge: Assign Default Bonuses
Challenge: Find Employees Without Managers
Advanced Null Handling
Challenge: Calculate Average Bonus
Challenge: Prevent Division by Zero
Introduction to JSON Functions
Challenge: Extract User Interests
Challenge: Find Users by City
Advanced JSON Manipulation
Challenge: Update User Age
What is ACID?
Atomicity
Challenge: Transaction Creation
Consistency
Isolation
Isolation. Repeatable Read and Serializable Levels
Challenge: Specifying Isolation Level for Transaction
What are Indexes
B-tree Indexing
Challenge: Creating B-tree Index
Hash Indexing
Data Caching
General Optimization Strategies
Challenge: Query Optimization
Triggers
NoSQL
Tables and Data Organization
Primary Keys and Uniqueness
Foreign Keys and Relationships
One-to-Many and Many-to-Many Relationships
Normalization: Eliminating Redundancy
Denormalization and Performance Trade-offs
Self-Referencing Tables and Hierarchies
Polymorphic Associations
Inheritance Mapping Strategies
Handling Many-to-Many Relationships with Attributes
Temporal Data and History Tables
Soft Deletes and Data Archiving
Vertical and Horizontal Partitioning
Database Sharding
Schema Versioning and Evolution
Flexible Data Models: EAV and JSON Columns
Multi-Tenancy Patterns
Read/Write Optimization Patterns
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