Data update

Task/Fibonacci-sequence/DuckDB/fibonacci-sequence-1.duckdb

@@ -0,0 +1,11 @@
+create or replace function fib_to(n) as table (
+  with recursive fib(e,f) as (
+  select 1, 1
+    union all
+    select e+f,e from fib
+    where e <= n)
+  select f from fib
+  order by f
+);
+
+from fib_to(55);

Task/Fibonacci-sequence/DuckDB/fibonacci-sequence-2.duckdb

@@ -0,0 +1,2 @@
+select round ( power( ( 1 + sqrt( 5 ) ) / 2, level ) / sqrt( 5 ) ) fib
+from range(1,11) t(level);

Task/Fibonacci-sequence/DuckDB/fibonacci-sequence-3.duckdb

@@ -0,0 +1 @@
+SELECT 0::UHUGEINT, 1::UHUGEINT

Task/Fibonacci-sequence/DuckDB/fibonacci-sequence-4.duckdb

@@ -0,0 +1,16 @@
+# Warning: the following program has been naively adapted from the PostgresQL but
+# should be further modified to ensure correctness, e.g. by adding a counter
+CREATE or replace FUNCTION fib(n) AS (
+    WITH RECURSIVE fibonacci(current, previous) AS (
+
+    SELECT 0::UHUGEINT, 1::UHUGEINT
+    -- another possibility: SELECT 0::FLOAT, 1::FLOAT
+    UNION ALL
+        SELECT previous + current, current FROM fibonacci
+    )
+    SELECT current FROM fibonacci
+    LIMIT 1 OFFSET n
+);
+
+# Example
+select fib(100);