KwickClips Databases and SQL · 36 sec · free
How many rows remain after HAVING COUNT(*) > 1?
Short answer. Two, the groups with two rows each.
What do you do first when predicting?
Form the groups and count them.
Remember
| Count each group first |
| Then apply HAVING |
Can you predict this group by output in ten seconds? Surat has two, Pune two, Delhi one. Having removes Delhi. Two rows remain. Count each group first. Then apply having.
This clip is from the full lesson: GROUP BY and HAVING — 6 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: CBSE Class 12 Computer Science (083), CBSE Class 12 Informatics Practices (065), CBSE Class 12 Information Technology (802)
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