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24 lines
632 B
Markdown
24 lines
632 B
Markdown
# Fizzbuzz With Common Table Expressions
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In learning about CTEs (common table expressions) in postgres, I discovered
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that you can do some interesting and powerful things using the `with
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recursive` construct. The following solves the fizzbuzz problem for integers
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up to 100
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```sql
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with recursive fizzbuzz (num,val) as (
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select 0, ''
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union
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select (num + 1),
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case
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when (num + 1) % 15 = 0 then 'fizzbuzz'
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when (num + 1) % 5 = 0 then 'buzz'
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when (num + 1) % 3 = 0 then 'fizz'
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else (num + 1)::text
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end
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from fizzbuzz
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where num < 100
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)
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select val from fizzbuzz where num > 0;
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```
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