Easy join of 2 tables and count of specify column

Hi,
I have these two tables:
servers, records (contains info about server's fixes)
server has: id, description
records has: id, server, action
I would like to this view:
NameOfServer | Number of all applied fixes
serverA |120
serverB |180
I try this:
select records.server, COUNT(server) as countt
FROM records
GROUP BY records.server
HAVING COUNT(records.server) > 0
ORDER BY COUNT(records.server) desc
But first column had IdOfServer (as int), so I try JOIN:
SELECT records.server, COUNT(records.server) as countt, servers.description, servers.description
FROM records
LEFT JOIN servers
ON servers.id = records.server
GROUP BY records.server
HAVING COUNT(records.server) > 0
ORDER BY COUNT(records.server) desc
Bold text is problem: "servers.description" (which is varchar) had error message:
... is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.
Thx fo hint(s), Jerry

If you do not need this column as per your post , just do not specify it in the SELECT statement , otherwiseuse Jay reply.SELECT records.server, COUNT(records.server) as counttFROM records
LEFT JOIN servers
ON servers.id = records.server
GROUP BY records.server
HAVING COUNT(records.server) > 0
ORDER BY COUNT(records.server) desc
Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
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Hi folks,
Looking over these responses and not finding a lot of clarity yet in terms of leaving a trail for future readers to glean an answer from. I was just looking through the back-and-forth and curious myself about the issue First of all I think Jani's observations are quite on target. This CBO reaction is weird and does not work they way most Oracle users would expect it to work. Secondly, Jani really should tell us his Oracle version and folks providing answers should as well - the CBO is always being tweaked. Thirdly, Stefan provides a solution though it's a rather expensive solution to my taste. And finally, I think we as a group need to spend a bit more time reproducing things in code. I will give it a shot, feel free to correct anything I got wrong.
So first of all, I wrote this up quick on 12.1.0.2 and verified it was the same on 11.2.0.4
DROP TABLE my_table1 PURGE;
CREATE TABLE my_table1(
 objectid INTEGER NOT NULL
 ,tsource VARCHAR2(30 Char)
 ,shape MDSYS.SDO_GEOMETRY
 ,PRIMARY KEY(objectid)
DROP TABLE my_table2 PURGE;
CREATE TABLE my_table2(
 objectid INTEGER NOT NULL
 ,tsource VARCHAR2(30 Char)
 ,shape MDSYS.SDO_GEOMETRY
 ,PRIMARY KEY(objectid)
DROP TABLE my_table3 PURGE;
CREATE TABLE my_table3(
 objectid INTEGER NOT NULL
 ,tsource VARCHAR2(30 Char)
 ,shape MDSYS.SDO_GEOMETRY
 ,PRIMARY KEY(objectid)
CREATE OR REPLACE PROCEDURE seeder(
 p_count IN NUMBER
AS
 sdo_foo MDSYS.SDO_GEOMETRY;
 int_counter NUMBER := 1;
 FUNCTION random_line
 RETURN MDSYS.SDO_GEOMETRY
 AS
 num_x1 NUMBER;
 num_y1 NUMBER;
 num_offx NUMBER;
 num_offy NUMBER;
 BEGIN
 num_x1 := dbms_random.value(-179,179);
 num_y1 := dbms_random.value(-89,89);
 RETURN MDSYS.SDO_GEOMETRY(
 2002
 ,8265
 ,NULL
 ,MDSYS.SDO_ELEM_INFO_ARRAY(1,2,1)
 ,MDSYS.SDO_ORDINATE_ARRAY(
 num_x1
 ,num_y1
 ,num_x1 + 0.0001
 ,num_y1 + 0.0001
 END random_line;
BEGIN
 FOR i IN 1 .. p_count
 LOOP
 sdo_foo := random_line();
 INSERT INTO my_table1
 VALUES (
 int_counter
 ,'table1'
 ,sdo_foo
 int_counter := int_counter + 1;
 sdo_foo := random_line();
 INSERT INTO my_table2
 VALUES (
 int_counter
 ,'table2'
 ,sdo_foo
 int_counter := int_counter + 1;
 sdo_foo := random_line();
 INSERT INTO my_table3
 VALUES (
 int_counter
 ,'table3'
 ,sdo_foo
 int_counter := int_counter + 1;
 END LOOP;
 INSERT INTO my_table1
 VALUES (
 0
 ,'table1'
 ,MDSYS.SDO_GEOMETRY(
 2002
 ,8265
 ,NULL
 ,MDSYS.SDO_ELEM_INFO_ARRAY(1,2,1)
 ,MDSYS.SDO_ORDINATE_ARRAY(
 -87.8211111
 ,42.5847222
 ,-87.8212
 ,42.5848
 INSERT INTO my_table3
 VALUES (
 0
 ,'table3'
 ,MDSYS.SDO_GEOMETRY(
 2002
 ,8265
 ,NULL
 ,MDSYS.SDO_ELEM_INFO_ARRAY(1,2,1)
 ,MDSYS.SDO_ORDINATE_ARRAY(
 -87.8211111
 ,42.5848
 ,-87.8212
 ,42.5847222
 COMMIT;
END seeder;
BEGIN
 seeder(100000);
END;
SELECT 'my_table1: ' || COUNT(*) AS invalid_count FROM my_table1 WHERE MDSYS.SDO_GEOM.VALIDATE_GEOMETRY_WITH_CONTEXT(shape,0.05) <> 'TRUE'
UNION ALL
SELECT 'my_table2: ' || COUNT(*) AS invalid_count FROM my_table2 WHERE MDSYS.SDO_GEOM.VALIDATE_GEOMETRY_WITH_CONTEXT(shape,0.05) <> 'TRUE'
UNION ALL
SELECT 'my_table3: ' || COUNT(*) AS invalid_count FROM my_table3 WHERE MDSYS.SDO_GEOM.VALIDATE_GEOMETRY_WITH_CONTEXT(shape,0.05) <> 'TRUE';
BEGIN
 INSERT INTO user_sdo_geom_metadata(
 table_name
 ,column_name
 ,diminfo
 ,srid
 ) VALUES (
 'MY_TABLE1'
 ,'SHAPE'
 ,MDSYS.SDO_DIM_ARRAY(MDSYS.SDO_DIM_ELEMENT('X',-180,180,.05),MDSYS.SDO_DIM_ELEMENT('Y',-90,90,.05))
 ,8265
 COMMIT;
EXCEPTION
 WHEN OTHERS
 THEN
 NULL;
END;
BEGIN
 INSERT INTO user_sdo_geom_metadata(
 table_name
 ,column_name
 ,diminfo
 ,srid
 ) VALUES (
 'MY_TABLE2'
 ,'SHAPE'
 ,MDSYS.SDO_DIM_ARRAY(MDSYS.SDO_DIM_ELEMENT('X',-180,180,.05),MDSYS.SDO_DIM_ELEMENT('Y',-90,90,.05))
 ,8265
 COMMIT;
EXCEPTION
 WHEN OTHERS
 THEN
 NULL;
END;
BEGIN
 INSERT INTO user_sdo_geom_metadata(
 table_name
 ,column_name
 ,diminfo
 ,srid
 ) VALUES (
 'MY_TABLE3'
 ,'SHAPE'
 ,MDSYS.SDO_DIM_ARRAY(MDSYS.SDO_DIM_ELEMENT('X',-180,180,.05),MDSYS.SDO_DIM_ELEMENT('Y',-90,90,.05))
 ,8265
 COMMIT;
EXCEPTION
 WHEN OTHERS
 THEN
 NULL;
END;
CREATE INDEX my_table1_spx ON my_table1
(shape)
INDEXTYPE IS MDSYS.SPATIAL_INDEX
NOPARALLEL;
CREATE INDEX my_table2_spx ON my_table2
(shape)
INDEXTYPE IS MDSYS.SPATIAL_INDEX
NOPARALLEL;
CREATE INDEX my_table3_spx ON my_table3
(shape)
INDEXTYPE IS MDSYS.SPATIAL_INDEX
NOPARALLEL;
BEGIN
 dbms_stats.gather_table_stats(USER, 'MY_TABLE1');
 dbms_stats.gather_index_stats(USER, 'MY_TABLE1_SPX');
 dbms_stats.gather_table_stats(USER, 'MY_TABLE2');
 dbms_stats.gather_index_stats(USER, 'MY_TABLE2_SPX');
 dbms_stats.gather_table_stats(USER, 'MY_TABLE3');
 dbms_stats.gather_index_stats(USER, 'MY_TABLE3_SPX');
END;
CREATE OR REPLACE VIEW my_view
AS
SELECT
objectid
,'table1' AS tsource
,shape
FROM
my_table1
UNION ALL
SELECT
objectid
,'table2' AS tsource
,shape
FROM my_table2;
set timing on;
-- QUERY #1
-- Jani's original setup, works as expected
SELECT
COUNT(*) AS single_geom_counter
FROM
my_view a
WHERE
MDSYS.SDO_RELATE(
 a.shape
 ,MDSYS.SDO_GEOMETRY(
 2002
 ,8265
 ,NULL
 ,MDSYS.SDO_ELEM_INFO_ARRAY(1,2,1)
 ,MDSYS.SDO_ORDINATE_ARRAY(
 -87.8211111
 ,42.5848
 ,-87.8212
 ,42.5847222
 ,'mask=anyinteract'
) = 'TRUE';
-- QUERY #2
-- Now the problem statement
SELECT
COUNT(*) AS table_problem_counter
FROM
my_view a
WHERE
MDSYS.SDO_RELATE(
 a.shape
 ,(SELECT b.shape FROM my_table3 b WHERE b.objectid = 0)
 ,'mask=anyinteract'
) = 'TRUE';
-- QUERY #3
-- Stefan's solution
SELECT /*+ ORDERED */
COUNT(*) AS stefans_solution
FROM
my_table3 a
,my_view b
WHERE
a.objectid = 0
AND MDSYS.SDO_RELATE(
 a.shape
 ,b.shape
 ,'mask=anyinteract'
) = 'TRUE';
Anyhow, so the hard coded query #1 that Jani provided works exactly the way most folks would expect, the second item in the relate is applied to each spatial index participating in the view. I think we can agree this is what we want.
Now when we move on to the problem, well its all goes off the rails as I think its looks to apply the spatial filter to the view itself which lacks an index (not sure really)
So as Stefan says, you can work around this by rewriting things as query #3 does above though now its a full table scan of both tables in the view. This is a long way performance wise from Query #1!
So on my 12c test box
 query #1 Elapsed: 00:00:00.016
 query #3 Elapsed: 00:00:33.534
On 11g production box
 query #1 Elapsed: 00:00:00.49
 query #3 Elapsed: 00:02:31.45 (ouch!)
So hopefully someone else can jump in with more information on better solutions?
I overall tend to avoid the kind of unioned views that Jani is using here. I have a hard time recalling why but I must have been burned similarly many years ago when I was first starting with Oracle spatial. I tend to always want my spatial indexes right there where I can keep a grim stink eye on them. It may be that a unioned view with multiple spatial indexes behind it might just be a bad practice better done with a materialized view? Or maybe a lesser term? Unprofitable practice? fraught? "Best if you don't do that"?
Anyhow, I would be interested in what others have as input on the matter.
Cheers,
Paul

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Message was edited by: Gerardo Gaona

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