Task 1 plpgsql done

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+-- Perl Weekly Challenge 195
+-- Task 1
+
+CREATE SCHEMA IF NOT EXISTS pwc195;
+
+CREATE OR REPLACE FUNCTION
+pwc195.task1_plpgsql( n int )
+RETURNS int
+AS $CODE$
+DECLARE
+	i int;
+	freq int;
+	counter int := 0;
+BEGIN
+	FOR i IN 1 .. n LOOP
+	    SELECT count(*)
+	    INTO   freq
+	    FROM regexp_split_to_table( i::text, '' ) as n(d)
+	    GROUP BY d;
+
+	    IF freq = 1 THEN
+	       counter := counter + 1;
+	    END IF;
+
+	END LOOP;
+
+	RETURN counter;
+END
+$CODE$
+LANGUAGE plpgsql;