Index and tuning: Linking on the same table
Hello everyone,I have a PL/SQL mechanism that is based on a select query which links a table (T_RECHRED) on himself.
Here's the SQL...
SELECT
DR. LSZ, DR. RECH_ID RECH_ID, GS. RECH_ID GS_ID
Of
DR. T_RECHRED, T_RECHRED GS
WHERE
DR. DATE_FROM GROUP GS. DATE_FROM
AND DR. BILL_AMOUNT = GS. BILL_AMOUNT *-1
AND DR. LSZ = GS. LSZ
AND DR. ALNR = GS. ALNR
AND DR.CAT! = 'GS' AND GS.CAT = 'GS '.
ORDER BY
DR. LSZ CSA, DR. POSITIONSTEXT1 DESC;
As you can see, the table is joined to itself with the following fields...
DATE_FROM, LSZ, ALNR and BILL_AMOUNT (with GS having the dial-up sign)
Both sides of the join (separation) selection is on the cat 'IS GS' c to one side and 'NOT GS' for the other side. The selection of GS catches / selects several hundred thousand lines, while the 'NO GS' selection selects several million lines.
This query (and the accompanying PL/SQL process) works very well...
-Reduces data volumes
-With the following filter...
AND GS. RECH_MONTH IN (200809, 200810)
... which returns the same amount of data as a select complete!
... but seems to work constantly on the volume of data.
The really stupid thing is that I had run it once (full volume) but have reshaped the tables and somehow fail to replicate the index configuration that I had before (it's really stupid of me!)
So, my question is the best way to address such a request?
My thoughts are these:
-J' have my filter clause in the right order? The "GS.CAT = 'GS' is the most 'limit' filter so I put this last." Is this correct?
-Do I have to put the joints in a "INNER JOIN" clause (leaving the "Cat" filter in the WHERE clause), or it makes no difference?
-Is that the join on the BILL_AMOUNT with the sign reversed (*-1) impact on performance?
-J' would have separate index (on each join column)? Or I should have an index composed on the join fields all (or almost)?
-The ORDER BY clause is important (and cannot be deleted) because the PL/SQL depends on a concrete order.
I've been googling and reading my book "Oracle Tuning" but can not find all the information on the links between the tables on themselves.
Advice you can give me on this, or links to the 'case studies' or 'HOWTO', would be welcome.
Thank you very much
Alan Searle
PS: I tried to run a "explain plan" and that seems to work through OK but no data (as far as I can see) is written to the "PLAN_TABLE. Any ideas what I'm doing wrong here?
version of database? I suspect 10g or higher.
explain plan is now written in a global temporary table, it must be explained and look in the session.
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Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (52438,37084,27250,'ACTIVE',to_date('23-JUL-03','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (52648,37084,27250,'ACTIVE',to_date('17-FEB-04','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (20653,16456,27250,'Deleted',to_date('02-JUN-04','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (31000,16456,0,'Deleted',null); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (38241,16456,27250,'ACTIVE',to_date('28-APR-05','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (54130,37980,1232,'ACTIVE',to_date('08-MAR-00','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (56129,37980,1232,'ACTIVE',to_date('07-AUG-08','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (55025,38388,30622,'ACTIVE',to_date('06-DEC-98','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (55032,38388,30622,'ACTIVE',to_date('01-DEC-10','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (55517,38657,27884,'ACTIVE',to_date('04-FEB-10','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (55518,38657,27884,'ACTIVE',to_date('17-AUG-09','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (55519,38657,27884,'ACTIVE',to_date('21-JUL-09','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (44764,32871,12408,'ACTIVE',to_date('18-JUN-04','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (44765,32871,12408,'ACTIVE',to_date('16-JUN-04','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (44766,32871,12408,'ACTIVE',to_date('16-JUN-04','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (19076,15174,27250,'ACTIVE',to_date('02-NOV-02','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (50173,15174,1232,'ACTIVE',to_date('16-SEP-08','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (45046,33005,27250,'ACTIVE',to_date('03-SEP-92','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (45160,33005,27250,'ACTIVE',to_date('08-FEB-01','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (45161,33005,27250,'ACTIVE',to_date('06-NOV-06','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (44118,32387,27250,'ACTIVE',to_date('22-MAR-96','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (44119,32387,9950,'ACTIVE',to_date('30-DEC-04','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (44120,32387,9950,'ACTIVE',to_date('28-SEP-05','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (48418,34888,19586,'ACTIVE',to_date('02-MAR-90','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (48419,34888,28480,'ACTIVE',to_date('18-DEC-07','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (48420,34888,28480,'ACTIVE',to_date('24-AUG-04','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (43307,31893,29598,'ACTIVE',to_date('26-APR-04','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (43437,31893,9950,'ACTIVE',to_date('20-SEP-07','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (53612,37738,13428,'ACTIVE',to_date('28-JUN-04','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (53613,37738,15208,'ACTIVE',to_date('15-DEC-08','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (21555,17241,13428,'ACTIVE',to_date('11-JUN-99','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (21556,17241,13428,'ACTIVE',to_date('02-JAN-02','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (41336,30685,14966,'ACTIVE',to_date('07-OCT-03','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (42363,30685,9950,'ACTIVE',to_date('20-NOV-06','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (50926,36355,30862,'ACTIVE',to_date('13-DEC-07','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (50928,36355,30862,'ACTIVE',to_date('13-SEP-07','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (25520,20471,27250,'ACTIVE',to_date('06-JUN-98','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (25521,20471,0,'ACTIVE',to_date('31-AUG-04','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (2035,1069,30658,'Active',to_date('29-JAN-92','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (36762,1069,9950,'ACTIVE',to_date('16-MAY-05','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (36763,1069,9950,'ACTIVE',to_date('17-AUG-05','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (29807,23548,18458,'ACTIVE',to_date('18-AUG-00','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (29826,23548,17868,'ACTIVE',to_date('13-AUG-02','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (12818,10852,1232,'Active',to_date('01-JUN-98','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (12988,10852,1232,'Active',to_date('01-JUL-00','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (44287,32502,27884,'ACTIVE',to_date('10-JAN-08','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (44917,32502,9950,'ACTIVE',to_date('09-JUL-08','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (14430,12464,15070,'Active',to_date('03-APR-02','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (14431,12464,30658,'Active',to_date('08-NOV-89','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (42691,12464,30622,'ACTIVE',to_date('18-JAN-06','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (21608,17278,14966,'ACTIVE',to_date('03-AUG-00','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (25145,17278,14966,'ACTIVE',to_date('01-NOV-00','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (54918,38323,17868,'ACTIVE',to_date('21-MAR-02','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (55607,38323,17868,'ACTIVE',to_date('22-APR-10','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (28304,22497,1232,'ACTIVE',to_date('29-NOV-01','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (40755,22497,1232,'ACTIVE',to_date('13-DEC-06','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (13239,11318,19002,'Deleted',to_date('01-APR-99','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (13240,11318,19002,'Active',to_date('01-JAN-00','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (54317,38064,14966,'ACTIVE',to_date('01-DEC-99','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (54318,38064,30862,'ACTIVE',to_date('14-OCT-05','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (60404,38064,30658,'ACTIVE',to_date('31-AUG-11','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (60405,38064,30658,'ACTIVE',to_date('31-AUG-11','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (52800,37327,27250,'ACTIVE',to_date('27-JUN-02','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (52801,37327,27250,'ACTIVE',to_date('27-JUN-02','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (52802,37327,27250,'ACTIVE',to_date('19-DEC-99','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (41154,30599,27250,'ACTIVE',to_date('02-APR-02','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (46115,30599,27250,'ACTIVE',to_date('15-SEP-04','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (48532,34983,1232,'ACTIVE',to_date('16-SEP-05','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (48533,34983,1232,'ACTIVE',to_date('16-SEP-06','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (26868,21438,1232,'ACTIVE',to_date('13-JAN-05','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (26909,21438,1232,'ACTIVE',to_date('13-DEC-05','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (54646,38177,28480,'ACTIVE',to_date('02-DEC-99','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (54647,38177,28480,'Deleted',null); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (54648,38177,28480,'ACTIVE',to_date('01-NOV-04','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (26924,21471,10672,'ACTIVE',to_date('16-JAN-97','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (27385,21471,10672,'ACTIVE',to_date('12-NOV-97','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (27404,21471,3894,'ACTIVE',to_date('02-MAR-01','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (40329,30063,28480,'ACTIVE',to_date('07-OCT-02','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (40407,30063,28480,'ACTIVE',to_date('27-OCT-05','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (27949,22235,27250,'ACTIVE',to_date('07-JUL-98','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (27950,22235,27250,'ACTIVE',to_date('07-JUL-03','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (32387,25414,19032,'ACTIVE',to_date('18-APR-00','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (46214,25414,19032,'ACTIVE',to_date('18-APR-06','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (32226,25340,30658,'ACTIVE',to_date('25-MAY-05','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (33363,25340,27884,'ACTIVE',to_date('11-SEP-99','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (33364,25340,27884,'ACTIVE',to_date('08-FEB-01','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (55789,38840,1830,'ACTIVE',to_date('22-MAR-98','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (55790,38840,1830,'ACTIVE',to_date('22-MAR-98','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (55792,38840,1830,'ACTIVE',to_date('20-MAR-06','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (1976,1026,30658,'Active',to_date('21-JUN-94','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (47881,1026,1232,'ACTIVE',to_date('25-SEP-09','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (47882,1026,1232,'ACTIVE',to_date('21-JUN-04','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (13820,11900,27250,'Active',to_date('15-MAY-98','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (35519,11900,27250,'ACTIVE',to_date('18-JAN-99','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (35520,11900,27250,'ACTIVE',to_date('14-AUG-00','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (35521,11900,30658,'ACTIVE',to_date('03-DEC-02','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (35524,11900,30658,'ACTIVE',to_date('21-MAR-06','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (35525,11900,27250,'ACTIVE',to_date('29-AUG-01','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (26168,20977,27250,'ACTIVE',to_date('24-OCT-05','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (27644,20977,27250,'Deleted',to_date('29-OCT-05','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (27764,20977,27250,'Deleted',to_date('28-OCT-05','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (50681,20977,27250,'ACTIVE',to_date('28-OCT-05','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (49856,35737,27250,'ACTIVE',to_date('03-DEC-97','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (49858,35737,27250,'ACTIVE',to_date('19-JUL-07','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (41260,30649,27250,'ACTIVE',to_date('01-JUL-98','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (41261,30649,27250,'ACTIVE',to_date('01-JUN-98','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (8290,6012,14966,'Active',to_date('16-OCT-98','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (8291,6012,14966,'Active',to_date('24-FEB-99','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (49978,35835,9950,'ACTIVE',to_date('10-SEP-01','DD-MON-RR')); Insert into SOR_OFF (OFF_ID,OFFS_ID,STATE,STATUS,CON_DATE) values (49979,35835,9950,'ACTIVE',to_date('31-MAY-06','DD-MON-RR'));What I want is less than
-Search for a line more low which is CON_DATE > = to_date ('01-NOV-1998', ' MON-DD-YYYY "") AND STATE = 30658 and get the second row whose state = 30658 but having separate con_date
or CON_DATE = > = to_date (November 1, 1997 ',' MON-DD-YYYY "") AND STATE <>30658 & get the second row including State = 30658 but having separate con_date
and lower (status) = 'active '.
and get another line that extends beyond the found line, but having separate con_date (no operation of the same day.)
I tried to do it with and then attach it again with the same table, but I don't get different results...
Please advise.
Hello
n_shah18 wrote:
NO Frank
Thanks for trying.
First find a line that corresponds
((CON_DATE > = to_date (1er novembre 1998 ', ' MON-DD-YYYY ") AND STATE = 30658))
or (CON_DATE > = to_date (November 1, 1997 ',' MON-DD-YYYY "") AND STATE <> 30658))
8 second get/check the following line immediately for offs_id even that has different con_date, that is superior to prev con_date but State should be 3065
If offs_id found then return else throw line...
Thus, in addition to the conditions that I listed previously, there must be a line with the same offs_id, which has a con_date later and the State concerned; is this fair?
You can use a self-join to see if there is such an extra line:
WITH params AS
(
SELECT TO_DATE (November 1, 1998 ', 'DD-Mon-YYYY') AS later_threshold_date
AS target_state 30658
11900 AS target_offs_id
OF the double
)
SELECT s.offs_id
OF s sor_off
JOIN params p ON s.offs_id = p.target_offs_id
AND ((s.con_date > = p.later_threshold_date))
AND s.state = p.target_state
)
OR (s.con_date > = ADD_MONTHS (p.later_threshold_date, 12))
AND s.state <> p.target_state
)
)
JOIN sor_off ON s2.offs_id = s.offs_id s2
AND s2.con_date > s.con_date
AND s2.state = p.target_state
GROUP BY s.offs_id
;
The only difference between this and the previous solution is the last join, in other words, the 3 lines of code just before the GROUP BY clause.
-
Can we have hash partition and list on 2 columns in the same table. How.
Can we have hash partition and list on 2 columns in the same table. How.
Work on 10g release 2# List-Hash is a valid composite partitioning strategy 11 from g.
-
IS THIS POSSIBLE AND IF YES COLOR 'HOW' TO HAVE DIFFERENT LINKS ON THE SAME PAGE?
Hello
IS THIS POSSIBLE AND IF YES COLOR 'HOW' TO HAVE DIFFERENT LINKS ON THE SAME PAGE?
How to replace the color of Page link?
See you soon,.
Dreamer101.1
Yes, it is possible, using CSS.
Here's how. You already know that the link colors are set in the following css rules:
- a: link
- a: active
- a: visited
- a: hover
All you have to do to have another set of links of different colors is to create another set of rules that set different colors and also have different names:
- a.name1:link
- a.name1: active
- a.name1:visited
- a.name1:hover
Can link you these rules to the anchor as a class tag: something.
You can have as many sets of rules to link given that the names you can think of.
Happy linking!
-
Print from parent to child link or a path in the same table
create the dummy of the array (number of nodeid, parentid number, nodename varchar2 (20));
insert into the dummy values(100,-1,'homegoods');
insert into the dummy values(101,100,'kitchen');
insert into the dummy values(102,101,'skillet');
Select * modeling gives:
Note: the parent id is the id of the node in the same table, except for the top node.nodeid parentid node_name 100 -1 HOMEGOODS 101 100 KITCHEN 102 101 SKILLET
Select nodeid, nodename, 'I want the full path from parent to child here' as the path from which dummy nodeid = 102
expected result
How can I do this?nodeid name path 102 skillet homegoods>kitchen>skillet
Thank youPlease post sample data!
You can use the sys_connect_by_path here:
hoek&XE> select nodeid 2 , nodename 3 , ltrim( sys_connect_by_path(nodename, '>') , '>') path 4 from dummy 5 where connect_by_isleaf=1 6 start with parentid = -1 7 connect by prior nodeid = parentid; NODEID NODENAME PATH ---------- -------------------- ------------------------------ 102 skillet homegoods>kitchen>skillet -
Insert select on the same table: possible without side effects?
I have a very large table T1 containing millions of records. I need to treat its lines and create a few new lines based on selection.
Table T1 contains events and one of them, with the code 100, is created by the further development of other events inside the table.
My code is as follows:
insert /*+append */ into T1 (code,...) values (100, c1,c2,...) select c1,c2... from T1 where (code=20 or code=10) and <other conditions>...
as you can see I'm extract T1 lines to insert again in T1 with a different code and I use the direct path in order to get good performance.
My fear is: choose is made from the same table I risk data loss? In general it is a good practice? Or is it better to create another table?
Hello
No I don't think that there may be loss of data. But that may depend on the behavior of the application and your where clause.
I will explain how it is treated, so you can see if it's ok:
1. the table is locked because of the insert add, (as)
2 lines are read by select and make compatible from the State that was at the beginning of the query - 1.
3 rows are inserted at the end, after the high-water line
4 columns for new lines are sorted to be merged in the index
5. high watermark is adjusted - visible new lines and lock is released
Note that 2. and 3. occur at the same time: rows are inserted all read.
Note that anyone can choose in the table during the operation - they see the changes committed only - if the State 1.
all other DML are waiting for the lock being released, and will see new ranks and then
If you have things that prevent the direct-path insert, append the hint will be ignored. So, if you must rely on close to 1. then the best lock explicitly with table lock. But I don't think that you need.
Kind regards
Franck.
-
Question: Is foreign key references to a different column in the same table
Hello
I'm not grasp this concept. Would you be able to provide the logic how and why you need to create a foreign key that references a column of the same table?
For example, referencing the schema, SupervisorNo @ here is a FOREIGN KEY to the "EmpNo" column in the same table.
EMPLOYEE (EmpNo, title, Fname, Lname, phone, Email, date of birth, sex, salary, HireDate, OutNo, SupervisorNo @)
Why would you want to do this and how can it be used? If you are filling out the data in the table, and this constraint is enabled, you will not be able to load whatever it is because the "EmpNo" column will be empty.
Any input you can provide me with this would be greatly appreciated. Thank you!
His name
Self-referential integrity constraints
Lets say that we have the table emp with emp_no and mgr_no columns.
Now all managers should also be an employee too. How can I check this when inserting data into this table? I applied auto integrity constraint. It would help me to make sure no handler (doesn't mean no mgr_no) must be registered if this Manager is not an employee of this organization. Which means, I won't be able to enter any mgr_no in the column until and unless that the same employee also is an employee (emp_no from the same table).
Check the link as well below.
Thank you
Ishan
-
Sinlge select query in the diff for the same table (same Structure) diagrams
Scenario:
Table XYZ is created in detail a.
After a year, the old data of the previous year could be moved to another schema. However in the other schema of the same table name would be used.
For example
A schema contains XYZ table with data from the year 2012
Schema B contains XYZ table with data for the year 2011
Table XYZ in the two schemas have an identical structure.
So we can draw a single select query to read the data from the tables in an effective way.
For example select * from XYZ so including date between October 15, 2011 to March 15, 2012.
However, the data resides in 2 different schema altogether.
Creating a view is an option.
But my problem, there are ORM (Hibernate or Eclipse Top Link) layer between the application and the database.
If the queries would be constituted by the ORM layer and are not generated by hand.
So I can't use the view.
So is there any option that would allow me to use only query on different scheme?970773 wrote:
Scenario:Table XYZ is created in detail a.
After a year, the old data of the previous year could be moved to another schema. However in the other schema of the same table name would be used.For example
A schema contains XYZ table with data from the year 2012
Schema B contains XYZ table with data for the year 2011
Table XYZ in the two schemas have an identical structure.So we can draw a single select query to read the data from the tables in an effective way.
For example select * from XYZ so including date between October 15, 2011 to March 15, 2012.
However, the data resides in 2 different schema altogether.Creating a view is an option.
But my problem, there are ORM (Hibernate or Eclipse Top Link) layer between the application and the database.
If the queries would be constituted by the ORM layer and are not generated by hand.
So I can't use the view.Why not make the ORM as below?
SELECT * FROM VIEW_BOTH;
-VIEW_BOTH is a real VIEW of Oracle
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