add attempt at p1 solution, to test later

sql/p0001.sql

@@ -0,0 +1,42 @@
+/*
+ Parameters:
+
+ Return: INT
+ Purpose:
+ Detailed explanation of the function which includes:
+         - Function business logic
+         - Transformation rules
+         - Here is a bit more text.
+ */
+CREATE FUNCTION function_name ()
+RETURNS INT
+AS
+BEGIN
+    -- SQL statements to define the function logic
+    CREATE TABLE IF NOT EXISTS threes ( value INT );
+    CREATE TABLE IF NOT EXISTS fives ( value INT );
+    CREATE TABLE IF NOT EXISTS fifteens ( value INT );
+    DECLARE @i INT = 0;
+
+    WHILE @i < 1000;
+    BEGIN
+        SET @i = @i + 3;
+        INSERT INTO threes VALUES ( @i );
+    END
+
+    SET @i = 0;
+    WHILE @i < 1000;
+    BEGIN
+        SET @i = @i + 5;
+        INSERT INTO fives VALUES ( @i );
+    END
+
+    DECLARE @result INT = SELECT SUM(value) FROM threes;
+    SET @result = @result + SELECT SUM(value) FROM fives;
+    SET @result = @result - SELECT SUM(value) FROM threes JOIN fives WHERE threes.value = fives.value;
+    DELETE threes;
+    DELETE fives;
+    DELETE fifteens;
+    RETURN @result;
+    -- Return statement indicating the result of the function
+END;