PostgreSQL で FizzBuzz.

面接の際にどうぞ。(謎

with recursive fizzbuzz(i, result) as (
  select
  1, '1'
  union all
  select
  i + 1
  ,case when (i + 1) % 15 = 0 then 'FizzBuzz'
        when (i + 1) % 5 = 0 then 'Buzz'
        when (i + 1) % 3=  0 then 'Buzz'
        else (i + 1)::text end
  from fizzbuzz
  where i < 100
)
select * from fizzbuzz;

 
BigQuery用に loop で書き直そうと思ったけどメンドクサイからやめたｗ
手軽にやるならこれか。

select
i,
case when mod(i, 15) = 0 then 'FizzBuzz'
     when mod(i, 5) = 0 then 'Buzz'
     when mod(i, 3) = 0 then 'Fizz'
     else cast(i as string) end as result
from unnest(generate_array(1, 100)) as i;

※いつの間にか BigQuery にも Recursive 実装されてた。
https://cloud.google.com/bigquery/docs/reference/standard-sql/query-syntax#with_clause

 
MS SQL Server なら T-SQL でこうか。
一時テーブル使うとラクね。

declare @i int = 1;
drop table if exists #temptbl;
create table #temptbl(i int, result varchar(8));
while @i <= 100
begin
	insert into #temptbl
	select
		@i as i,
		case 
			when @i % 15 = 0 then 'FizzBuzz'
			when @i % 5 = 0 then 'Buzz'
			when @i% 3 = 0 then 'Fizz'
			else convert(varchar(8), @i) end as result
	set @i = @i + 1
end
select * from #temptbl;