KwickClips Databases and SQL · 40 sec · free
What happens if no column name matches?
Short answer. You get a Cartesian product.
How many times does the common column appear?
Once.
Remember
| Same column name needed |
| Common column shown once |
Can SQL join tables with no condition? Yes. Natural join finds the column with the same name in both tables. It matches rows on it. That column appears only once. Two rules. Column names must match. It shows once.
This clip is from the full lesson: Working with Two Tables: Cartesian Product, Equi-join and Natural Join — 7 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: CBSE Class 10 Information Technology (402), CBSE Class 12 Computer Science (083), CBSE Class 12 Informatics Practices (065), CBSE Class 12 Information Technology (802)
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What makes a join an equi-join?41 secDisclaimer. KwickAcademy is free study material for general learning and revision. Parts of it, including the voice-over, are produced with the help of AI tools and may contain errors; if you spot one, please tell us and we will correct it. Syllabus, marks and exam details follow the latest official board publications available to us, and boards can change them at any time, so always confirm against your board's official website and your school. Using this material does not guarantee any marks or result. Board names and trademarks belong to their owners; Kwickprep is not affiliated with or endorsed by any examination board. We never ask for passwords, OTPs or ID numbers. Your progress is saved only in this browser. Full disclaimer · Privacy