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100 lines
1.5 KiB
Markdown
100 lines
1.5 KiB
Markdown
# Queries
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## Sub-queries
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1. Get all the students whose IQ is greater than the average IQ.
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```sql
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```
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2. Get all the students whose IQ is greater than the highest IQ of the batch_id `2` students.
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```sql
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```
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3. Get all the students whose IQ is greater than `all` the IQs of the batch_id `2` students.
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```sql
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```
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4. Find all the students who are in batches that start with the word `Jedi` (Without JOIN)
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```sql
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```
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5. Find all the students whose IQ is greater than the average IQ of their batch.
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```sql
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```
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6. Get all the instructors that have at least one batch (Without using joins)
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```sql
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```
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7. Print all the names, batch ID and average IQ of the batch for each student
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```sql
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```
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## Built-in Functions
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1. Get the average IQ of all the students rounded to the nearest integer.
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```sql
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```
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2. Find all batches whose name is longer than 10 characters.
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```sql
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```
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3. Find all batches whose name's first 10 characters contains the string `sher`
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```sql
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```
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4. Get all batches that have started on a Sunday
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```sql
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```
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5. Get all batches that have been running for more than 10 years
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```sql
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```
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6. Print the name and the instructor's id for each batch. If no instructor is assigned, print `NO INSTRUCTOR`.
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```sql
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```
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7. Print the name and IQ of each student. If the IQ of the student is less than 100, print `LOW IQ` instead.
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```sql
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```
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8. For each student print the name and their IQ category.
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| IQ | Category |
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| --------- | -------- |
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| < 100 | LOW IQ |
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| 100 - 150 | MEDIUM |
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| > 150 | HIGH |
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```sql
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```
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