selection of the results aggregated into a PL/SQL block gives me ORA-00934

Hello

I have a simple table of objects on the map that were inclusive. That is to say:
CREATE TABLE tbl (
  id NUMBER(11,0), -- Id of this record
  parentId NUMBER(11,0), -- Id from some parent table
  bb_sw_lat FLOAT, -- SW bounding box corner - Latitude
  bb_sw_lng FLOAT, -- SW bounding box corner - Longitude
  bb_ne_lat FLOAT, -- NE bounding box corner - Latitude
  bb_ne_lng FLOAT -- NE bounding box corner - Longitude
);

INSERT INTO tbl VALUES (1, 1, 10, 10, 20, 20);
INSERT INTO tbl values (2, 1, 5, 5, 35, 35);
INSERT INTO tbl values (3, 1, -5, -20, 0, 0);
INSERT INTO tbl VALUES (4, 2, 9, 9, 10, 10);
INSERT INTO tbl values (5, 2, 1, 1, 1, 1);
I can query the number of entries for a parent entity and the use of aggregate functions calculate the framework encompassing total for the parent entity:
SELECT
  count(*),
  NVL(MIN(bb_sw_lat),0),
  NVL(MIN(bb_sw_lng),0),
  NVL(MAX(bb_ne_lat),0),
  NVL(MAX(bb_ne_lng),0)
FROM tbl
WHERE parentId=1;
but the same select cannot be put to the PL/SQL block:
DECLARE
  cnt NUMBER;
  sw_lat FLOAT; sw_lng FLOAT; ne_lat FLOAT; ne_lng FLOAT;
BEGIN
  SELECT
    count(*) INTO cnt,
    NVL(MIN(bb_sw_lat),0) INTO sw_lat,    -- ORA-00934: group function is not allowed here
    NVL(MIN(bb_sw_lng),0) INTO sw_lng,
    NVL(MAX(bb_ne_lat),0) INTO ne_lat,
    NVL(MAX(bb_ne_lng),0) INTO ne_lng
  FROM tbl
  WHERE parentId=1;
END;
can someone please explain to me why and what to do with it? Examples are executable as they are, it should be fairly easy to reproduce.

Thank you very much!

Kuba

Published by: user3620664 on May 14, 2009 02:14 added formatting

without testing, just an IN

DECLARE
  cnt NUMBER;
  sw_lat FLOAT; sw_lng FLOAT; ne_lat FLOAT; ne_lng FLOAT;
BEGIN
  SELECT
    count(*),
    NVL(MIN(bb_sw_lat),0),
    NVL(MIN(bb_sw_lng),0),
    NVL(MAX(bb_ne_lat),0),
    NVL(MAX(bb_ne_lng),0)
 INTO cnt,
  sw_lat,
  sw_lng,
  ne_lat,
  ne_lng
   FROM tbl
  WHERE parentId=1;
END;

Published by: Alex Nuijten on May 14, 2009 11:19

Tags: Database

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    Richard

    Hi, Richard,.

    Richard Legge wrote:

    Hello.. Thanks for the reply...... The reason for the 'distinct' to ensure that the query retrieves only one line (based on the extraction of the full line, as you point out)... (so why he would never get more than one?) Well Yes... know that the media are not quite relevant...

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    Richard

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select  2 as n from dual union all
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