Data
SQL
Querying, joining and aggregating tables. The most useful language you'll learn in a weekend.
About 10 hours of study.
Where to learn it
Read
The PostgreSQL tutorial
The PostgreSQL Global Development Group
Part I, Tutorial
Section not checked yet
Watch
Practise
Other options
- Kaggle Learn (practise)
Intro to SQL, then Advanced SQL - SQL 50 (practise)
SQL 50, every section - PostgreSQL Exercises (practise)
Every section, in order
Wrong chapter, dead link, or know something better? Tell us on GitHub.
Which roles ask for it
- Software engineer (SDE) to get hired
- Backend engineer to get hired
- Full-stack engineer to get hired
- QA engineer / SDET to get hired
- Data analyst to get hired
- Data engineer to get hired
- Machine learning engineer to get hired
- Risk analyst to get hired
- Financial analyst in the first year
- Economist / economic research analyst in the first year
- Statistician / biostatistician to get hired
- Salesforce administrator / developer to get hired
- ServiceNow developer to get hired
- BI developer to get hired
- Analytics engineer to get hired
- Product analyst to get hired
- Database administrator to get hired
- Solutions architect to get hired
- Product manager to get hired
- Business analyst to get hired
- GATE computer science to get hired
- Data scientist to get hired
- Application support engineer to get hired
- GATE data science and AI to get hired
- UGC NET computer science to get hired
Before and after
SQL