SQL & Databases

SQL & Databases Courses

Master SQL and databases: from basic queries to advanced techniques, schema design, and Python integration — become proficient in working with data!

4.7

Bedømt efter 121 anmeldelser.

119 Lærende

Allerede tilmeldt

Opnåede færdigheder:

A/B Test Analysis in SQLAND/OR/NOT-operatorerAdvanced Join TechniquesAdvanced SQL ReportingAggregations and GroupingAttribution ModelingBusiness Logic with CASE WHENCRUD-operationerCampaign Performance QueryingCohort Analysis with SQLData Analysis with JoinsData Analysis with SQLData Filtering and SortingData Modeling for BIData Reconciliation in SQLDatabase NormalizationDatabasemodelleringDatabasenormaliseringDatabasestyringDataindeksering og -udvælgelse i pandasDatamanipulation (DML)Event-based Data ModelingExecution Plan AnalysisFeature Adoption AnalysisFiltrering baseret på intervallerFunnel Analysis in SQLGruppering og filtrering af dataHåndtering af NULL-værdierIndlejrede SQL-subforespørgslerKonstruktion af komplekse forespørgslerLedger-Style SQL JoinsMulti-table QueriesORDER BY-sorteringPartitioning and Framing in SQLPython-programmeringQuery Planning and OptimizationRanking and Analytic FunctionsResult Set ConstructionRetention and Churn QueriesSQL AggregationsSQL BasicsSQL Date and Time FunctionsSQL FunctionsSQL JOIN-typerSQL JSON FunctionsSQL JoinsSQL Logical FunctionsSQL Null FunctionsSQL Numeric FunctionsSQL Parsing and ValidationSQL Period-over-Period AnalysisSQL Query LifecycleSQL Query OptimizationSQL Reporting PatternsSQL SELECT-sætningerSQL String FunctionsSQL Time-Series AggregationSQL Transaction Logic & ACIDSQL UNION-forespørgslerSQL Window FunctionsSQL i Python-projekterSQL-aggregeringsfunktionerSQL-forespørgselsoptimeringSQL-grundlæggendeSessionized Data AnalysisSkemadefinition (DDL)SubqueriesTable JoinsUdvælgelse af unikke værdierWHERE-klausulfiltreringWindow FunctionsWindow Functions for Product Metrics

Vis mere

Tag en kort quiz og kom tættere på dine mål!

80,000

Eleverne har allerede gennemført kurserne med succes og anvender deres færdigheder på arbejdspladsen

92%

Brugere finder vores kurser nyttige

Kurser

Udforsk SQL & Databases kurser og projekter

Niveau

Lektionstype

Teknologier

Introduction to SQL

4 timer

41 kapitler

Begynder

Opnåede færdigheder: SQL SELECT Statements, WHERE Clause Filtering, ORDER BY Sorting, SQL Aggregate Functions, AND/OR/NOT Operators, NULL Value Handling, Range-Based Filtering, Distinct Value Selection

Intermediate SQL

3 timer

25 kapitler

Mellemniveau

Opnåede færdigheder: SQL Aggregate Functions, Grouping and Filtering Data, Nested SQL Subqueries, SQL UNION Queries, SQL JOIN Types, Data Manipulation (DML), Schema Definition (DDL), Complex Query Construction

SQL Optimization and Query Features

4 timer

22 kapitler

Avanceret

Opnåede færdigheder: SQL Query Optimization, Data Indexing and Selection in pandas, Database Management, Database Normalization, SQL Basics, CRUD Operations, Database Modeling

Working with Databases in Python

3 timer

21 kapitler

Mellemniveau

Opnåede færdigheder: Python Programming, CRUD Operations, SQL in Python Projects, Database Normalization, SQL Basics

Relational Database and Normalization

1 time

12 kapitler

Begynder

Opnåede færdigheder: SQL Query Optimization, Database Normalization

SQL for Data Analysis

2 timer

18 kapitler

Mellemniveau

Opnåede færdigheder: SQL Basics, Data Filtering and Sorting, Aggregations and Grouping, Table Joins, Subqueries, SQL Functions, Data Analysis with SQL

Window Functions in SQL

4 timer

21 kapitler

Avanceret

Opnåede færdigheder: SQL Window Functions, Ranking and Analytic Functions, Partitioning and Framing in SQL, Advanced SQL Reporting

Functions in SQL

3 timer

35 kapitler

Begynder

Opnåede færdigheder: SQL String Functions, SQL Date and Time Functions, SQL Numeric Functions, SQL Logical Functions, SQL Null Functions, SQL JSON Functions

SQL Joins in Depth

2 timer

21 kapitler

Begynder

Opnåede færdigheder: SQL Joins, Multi-table Queries, Data Analysis with Joins, Advanced Join Techniques

SQL Query Execution

1 time

12 kapitler

Begynder

Opnåede færdigheder: SQL Query Lifecycle, SQL Parsing and Validation, Query Planning and Optimization, Execution Plan Analysis, Result Set Construction

SQL for Business Intelligence Analysts

2 timer

18 kapitler

Mellemniveau

Opnåede færdigheder: SQL Aggregations, Business Logic with CASE WHEN, Window Functions, Data Modeling for BI, SQL Reporting Patterns

SQL for Finance and Accounting

4 timer

22 kapitler

Avanceret

Opnåede færdigheder: SQL Time-Series Aggregation, SQL Period-over-Period Analysis, Ledger-Style SQL Joins, Data Reconciliation in SQL, SQL Transaction Logic & ACID

1 2

Codefinity fordele

KI-assisteret læring

Omfavn fascinationen for teknologiske færdigheder! Vores KI-assistent giver feedback i realtid, personlige hints og fejlforklaringer, så du trygt kan lære.

Arbejdsområder

Med arbejdsområder kan du oprette og dele projekter direkte på vores platform. Vi har forberedt skabeloner til din bekvemmelighed

Læringsstier

Tag kontrol over din karriereudvikling og start din rejse mod at mestre den nyeste teknologi

Virkelige projekter

Virkelige projekter løfter din portefølje og viser praktiske færdigheder, der imponerer potentielle arbejdsgivere

Hvorfor Codefinity skiller sig ud

Videomateriale

Downloadbare materialer

Ansete certifikater

Interaktivt læringsmiljø

Fejlrettelse

AI-assistent

Adgang til alt indhold med ét abonnement

Codefinity

Videobaserede læringsplatforme

Codefinity

Videobaserede læringsplatforme

Videomateriale

Downloadbare materialer

Ansete certifikater

Interaktivt læringsmiljø

Fejlrettelse

AI-assistent

Adgang til alt indhold med ét abonnement

KarrieremulighederLær om de mest populære erhverv, gennemsnitslønninger og virksomheder, der aktivt søger specialister inden for dette felt.

Databaseadministrator

Dataingeniør

Dataarkitekt

$81k

$110k

$140k

Min

Average

Max

Årlig løn

(Gennemsnit i USA)

Ansættende virksomheder

*Kilde: Glassdoor

Udvalgt af studerende fra de allerbedste skoler

Inkluderer 30 af de 30 allerbedste universiteter i USA.

SQL & Databases Courses: Nøgleinfo og spørgsmål

What is SQL and why is it important?

SQL (Structured Query Language) is the standard language for interacting with relational databases. It allows you to retrieve, filter, update, and manage data efficiently — making it a core skill for data analysts, developers, and anyone working with structured data.

What will I learn in SQL & Databases courses?

You’ll learn how to write SQL queries, use SELECT, WHERE, JOIN, GROUP BY, ORDER BY, and perform operations like filtering, aggregating, and combining data. Advanced topics include subqueries, window functions, indexing, and database design.

Do I need coding experience to start learning SQL?

Not at all. SQL has a relatively simple, readable syntax and is perfect for beginners. Even without programming experience, you can quickly start querying real databases and exploring structured data.

Are the courses practical and hands-on?

Yes — courses include interactive SQL editors, real-world datasets (like sales, users, or orders), and exercises that simulate real analysis tasks. You’ll write queries and get instant feedback, making learning active and engaging.

What databases will I work with?

Most courses use SQLite or PostgreSQL for simplicity, but you’ll also get exposed to MySQL and possibly cloud databases. The SQL you learn is transferable across all major relational database systems.

What careers can SQL help me with?

SQL is a must-have for roles like data analyst, business analyst, backend developer, database administrator, and product analyst. It’s also widely used in marketing, operations, finance, and research roles that involve data-driven decisions.

How is SQL used in real life?

SQL is used to power dashboards, generate reports, connect APIs to databases, track user behavior, and run backend services. It’s the foundation behind most apps, websites, and data tools used in modern businesses.

Will I get a certificate?

Yes — completing any SQL & Databases course earns you a certificate that proves your skills in querying and managing data, which can enhance your job applications or technical portfolio.

Can I combine SQL with other tools like Python or Excel?

Definitely. Many data analysts use SQL to get the data, and then tools like Python, Excel, or BI platforms (like Tableau) to further analyze and visualize it. Our advanced courses may show you how to connect them together.

Relaterede emner

Webudvikling QA Cloud Computing JavaScript Social Media Management Deep Learning Excel Frontend-udvikling C#Spiludvikling

Hvad siger vores brugere

Deltag 1.5+ millioner avancerer i AI og datafærdigheder hos Codefinity

Klar til at starte?

ProBedste introduktionstilbud$12 /mdÅrlig fakturering

250+ topbedømte kurser

Afslutningscertifikater

KI-assistent i alle kurser

40+ hands-on Real-world projects

Personlige studieveje

Ubegrænsede arbejdsområder

UltimateAlt du behøver for at booste din karriere$25 /mdÅrlig fakturering

250+ topbedømte kurser

Afslutningscertifikater

KI-assistent i alle kurser

40+ hands-on Real-world projects

Personlige studieveje

Ubegrænsede arbejdsområder

Topkurser i SQL & Databases kategori

1.	Introduktion til SQL	4 timer	41 kapitler
2.	Intermediær SQL	3 timer	25 kapitler
3.	SQL-optimering og Forespørgselsfunktioner	4 timer	22 kapitler
4.	Databaser i Python	3 timer	21 kapitler
5.	Relational Database and Normalization	1 timer	12 kapitler