PL/SQL :: Generate Stats For DBLink Table (SQL)
Sep 7, 2012
I am trying to generate some statistics on tables connected by a dblink. I know with oracle you have table_columns which you can reference and pull some stats from.
Trying to get the column count and record counts for each table connected by a dblink. I have tried these queries below to see if I could see any db properties: (some just to try something different)
select * from "table_owner".table_column@dblink ;
select * from "status"@dblink;
select /*DRIVING_SITE(a) */ count(*) from @dblink a;
What is the best method to finding this out without spending a lot of time? I have over 30 tables which are with large record sets and would love to learn a faster approach then pulling a sample table and doing a manual count and query for each table to count the rows.
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Jan 27, 2011
DBMS_STATS.CREATE_STATS_TABLE
DBMS_STATS.EXPORT_SCHEMA_STATS
DBMS_STATS.GATHER_TABLE_STATS
I have used the above to get a copy of schema stats and gather new stats for specific tables into a STATS TABLE in my personal schema. What I want to do now is use this stats table to generate plans for queries where I believe stats are off. Is it even possible? To be clear, I do not want to import stats because this replaces the stats currently there. I just want to point the CBO to my stats table for generating plans.
there was a session parameter I could set to tell oracle to use my stats table when generating plans, or an explain plan clause I could use or a DBMS_XPLAN paramter I could provide that would tell these tools to use my stats table when generating a plan, or even some way to tell autotrace. But I have found none of this.
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Sep 11, 2012
During STATS gather running for the table, unknowingly i deleted the old stats using EXEC DBMS_STATS.DELETE_TABLE_STATS. I would like to know will it affect the stats gather job currently running for the table and whether my stats will be gathered successfully.
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May 26, 2011
I have doupts in gathering stats on table. I analyzed one table it took 2 hours first time.. the same table after one week later i analyzed, its got completed within 45 minutes.. I don't know exact reason why i got completed very soon. Is there any specific reason?
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Jan 30, 2012
When we upgrade from 10g to 11g oracle upgrades the stats table by EXECUTE DBMS_STATS.UPGRADE_STAT_TABLE('OWNER','TABLE'); But When we import from 10g to 11g do we need to upgarde the stats table??
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Oct 10, 2013
We are running 11g (11.2.0.3)We have a "working table" that is empty at the beginning of the day.Then we start adding rows (insert) with a key column called STATE with a value of 100.At the same time, there are other apps that pickup data in state 100 , process that data and change that state to 200 or 300.There is also another app that pickup data in state 200 , process that data and change that state to 300 or 400.
So in summary, the data on that table is at the beginning empty, then all the rows are in state 100, they slowly move to different states (200, 300, etc) and by the end of the day, they are all in 400.
My question is what would be the best way to collect stats on this table?
I was thinking to create an hourly job to collect stats on that table:
exec dbms_stats.gather_table_stats (
ownname => 'SCOTT',
tabname => 'WORK_T
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Aug 8, 2013
Is it possible for the DBMS_STATS "LIST STALE" command to show a stale partition but NOT have its table show as stale?
I had a scenario where the table itself AND 1 partition showed as stale. I ran a fnd_stats gather table stats just on that 1 partition. Once it was completed it showed the partition to no longer be stale. it also showed that the table was no longer stale. so I guess I do not need to run stats on the whole table as well?
so if this is the case, when would I need to run stats on the full partitioned table if running it on the partitions themselves removes the staleness of the table?
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Aug 6, 2010
DB1: Sql Server
DB2: Oracle 11g
Is it possible to create a MV log against table@DB1? If not, then am I limited to refresh complete if I need to create MVs against @DB1?
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Apr 16, 2013
I successfully created the following DBLink in my DEV environment:
CREATE PUBLIC DATABASE LINK PROD
CONNECT TO USER1 IDENTIFIED BY pwd98
USING 'PRD';
I have a table in both schemas. In PROD it has 0 recs, in DEV it has 134 recs.
select count(*) from hold@PROD.
The above query gives me 134 recs instead of 0!
Here is my TNSNAMES entry for PRD:
PRD=
(DESCRIPTION=
(ADDRESS=
(PROTOCOL=TCP)
(HOST=localhost)
(PORT=1529)
)
(CONNECT_DATA=
(SERVER=dedicated)
(SERVICE_NAME=PRD_USR)
))
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Aug 6, 2012
Our UNDO space remains at a high level 85 to 95 percent. We keep adding database files and it doesn't seem to go down significantly. When we do a backup of the system where we shut the database down, it does go down some but then within a week or so it is back up again.
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Aug 21, 2013
I have something strange :
I am executing a select on a single table using a dblink from oracle9 to oracle11 and i don't know why automatically add in the select the rowid at the end. The problem is that inside the query i have a group by so it crash.
Query sample :
original query from vb:
select a, b, c
from mytable
group by a, b, c
query intercepted on oracle11:
select a, b, c, rowid
from mytable
group by a, b, c
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Jan 26, 2012
I have created a table like below-
PROMPT CREATE TABLE tst_fetch_vendor_data
CREATE TABLE tst_fetch_vendor_data (
vendor_data_seq_no NUMBER NOT NULL,
study_seq_no NUMBER NOT NULL,
vendor_record_seq_no NUMBER NOT NULL,
control_column_seq_no NUMBER NOT NULL,
resolved_value VARCHAR2(4000) NULL,
original_value VARCHAR2(4000) NULL,
transaction_user VARCHAR2(30) NOT NULL,
[code]....
Its just a temporary table, in which data comes and goes. I am using this in middle of a process.I am using it in a process like below--
--EXECUTE IMMEDIATE 'TRUNCATE TABLE TST_FETCH_VENDOR_DATA DROP STORAGE';
insert /*+ append */ into tst_fetch_vendor_data
(select * from vendor_data vd
where vd.control_column_seq_no in
(select control_column_seq_no from temp_control_column));
dbms_stats.gather_table_stats('EPDSYSREP','TST_FETCH_VENDOR_DATA',ESTIMATE_PERCENT=>100,
METHOD_OPT=>'for all indexed columns size auto',CASCADE=>True);
code to use that table..This table can contain data from 0 to 108000000 records.Now my questions are-
1. How much should I select sampling size (currently its 100%)Can I use dbms_stats.auto_sample_size, what will be the effect?
2. dbms_stats is good approach or should I use dynamic sampling.
3. what about the approach using CTAS instead of inserting data through insert.
4. What about pl/sql table with index or with clause query.
5. Do I need to rebuild index after inserting data into table.
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Sep 11, 2012
I load a table through sql loader which takes nearly 14 min for 8-9 millions records, once the records complete i run the analyze table compute statics to gather stats and it takes nearly 15 min. is there any ways so that i can reduce the stats timing. the stats collection command runs from other schema not from where the table is residing.
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May 12, 2011
we are facing an issue with the dbms scheduler jobs, which is not processing the synonym which is created via dblink from anthoer schema.
Let me explain the situation.
Table in Schema :APP_COMMON DB: APPL
-------------------------------------
CREATE TABLE TEST_LOG (A VARCHAR2(10));
INSERT TEST_LOG VALUES ('TESTED');
GRANT SELECT ON TEST_LOG to APP_GEN ;
Table in Schema :APP_GEN DB: APPL
-------------------------------------
CREATE SYNONYM TEST_LOG FOR APP_COMMON.TEST_LOG;
SELECT * from TEST_LOG;
-- it returns the value
Table in Schema :APP_GEN DB: REPORT
-------------------------------------
This is the different DB (we have 2 DB's, one for report db and one for application DB). here we create the DB link (connected DB menthod) . Since we have the password sync between the databases, we create the DBLINK without user id and password.
CREATE DATABASE LINK "APPL_LINK"
USING 'APPL' ;
CREATE SYNONYM TEST_LOG FOR TEST_LOG@APPL_LINK;
SELECT * from TEST_LOG;
--it returns the value.
Now in the same DB, we have a scheduler which will run for every min.
Now Scheduler is not selecting this table. Rather not processing the synonym(TEST_LOG). Not able to capture the exception also.
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Oct 10, 2012
i have a large OLTP database and we are doing table stats copy amount subpartition to save the load on system. while doing an copy default subpartition stats: I see the following error:
SQL> exec DBMS_STATS.COPY_TABLE_STATS('cusms','STATUS_HIST','P_VDEF_10_2012_S100','P_VDEF13_10_2012_S100',force=>true);
BEGIN DBMS_STATS.COPY_TABLE_STATS('cusms','STATUS_HIST','P_VDEF_10_2012_S100','P_VDEF13_10_2012_S100',force=>true); END;
*
ERROR at line 1:
ORA-03113: end-of-file on communication channel
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Jun 9, 2011
I've got table at Oracle test server table1 with columns ID, BTYPE, MYDESCRIPTION. Rows of this table have been inserted manually. Now my need is to write script for creating table (structure + data) for working server. I think about writing something like
CREATE TABLE table 1
AS
SELECT 1 AS ID, 'TYPE1' AS BTYPE, 'SOME TEXT' AS MYDESCRIPTION
UNION ALL
SELECT 2 AS ID, 'TYPE2' AS BTYPE, 'SOME TEXT 2' AS MYDESCRIPTION
But rows are too many to type... Any way of generating script for creating table at working server using existing table at test server? The problem is I don't have an access to working server.
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Apr 19, 2011
I am working in Oracle 10g.
I have a xsd file and what I need is to generate the create tables from the structure?
Is it possible or do I have to do it manually?
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Aug 25, 2011
Is it possible to save a report directly in a table instead of the typically destination? (file, cache,...)
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Nov 27, 2012
Is there any way to generate columns dynamically by depending on the rows in a table in 11G .
Ex: If the deptno in DEPT table is not constant,then how to generate the N numbers of columns based on the deptno. Below query is working when we hard coded the deptno (10,20,30,40).What else if we more number of departments and we don't know the departments also.
Connected to Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
Connected as dbo
SQL> SELECT *
FROM (SELECT deptno, job, sum(sal) sal
FROM SCOTT.emp GROUP BY job, deptno) PIVOT(sum(sal) FOR deptno IN(10,
20,
30,
40));
[code].....
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Mar 29, 2013
generate the number of rows based on table field.
Sample code is given below.
CREATE TABLE T
(
docno VARCHAR2(10),
CODE VARCHAR2(8),
QTY NUMBER(3)
)
LOGGING
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Mar 19, 2013
CREATE TYPE TEST_103 AS OBJECT(CHILD_CSE_ID VARCHAR2(25));
CREATE TYPE TEST_104 AS TABLE OF TEST_103;
CREATE TABLE TEST_105 (
CL_ID VARCHAR2(25),
CSE_ID VARCHAR2(14),
EXP_ID VARCHAR2(13),
[code]....
I want an XML output like as follows
<?xml version="1.0" encoding="UTF-8"?>
<Main_case>
<cl_id="A">
<cse_id="100">
<cs_lst>
[code]....
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Sep 28, 2013
I have two control block i.e. class_register and student_info. In which student_info is multi-record block which contains stud_id, stud_name, stud_roll_no. Based on the class_register block, stud_id and stud_name is generated in the student_info table. Now I want to generate stud_roll_no automatically until the last record is present.
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Dec 11, 2006
I have two Tables, the one table is called (calves_per_breed) and contains all my query results. I then have another table (calves_per_breed_crosstable) which is used to place the generated count values in calves_per_breed to create a crosstable from the count data into calves_per_breed_crosstable.
I'm using the following procedure to generate the crosstable from the data inside the calves_per_breed table:
PROCEDURE pcalves_per_breed_genCrossTable
IS
BEGIN
---------------------------------------------------------------------------
--SEX CODES
update calves_per_breed_crosstable
set (m, f) = (select count(decode(geslag, 'M', 1, null)),
count(decode(geslag, 'F', 1, null))
from calves_per_breed)
[codee]....
Now this procedure works 100%, the only problem is it generates the ENTIRE table. if you know how a crosstable works, thetop right section of the table is exactly the same as the bottom left section of the table. I wish to optimize my code so that it only generates the values for the needed columns, and not ALL the columns, as values are generated twise now, which increases the query time! Here is a tipical output of the kalwers_per_ras_crosstable:
Note: You will notice that i used a Column called TID with string values to indicate the vertical columns for the crosstable. The Vertical Columns are the same as the top Columns(which are actual columns, and not row values as the vertical columns)
select *from kalwers_per_ras_crosstable:
TID M F NFR A B C SP RED BLACK SC1 SC2 SC3
----- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
M 138 0 0 0 0 0 138 122 16 74 64 0
F 0 173 0 0 0 0 173 161 12 92 81 0
NFR 0 0 0 0 0 0 0 0 0 0 0 0
A 0 0 0 0 0 0 0 0 0 0 0 0
[code]....
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Aug 21, 2008
Is theree any way to generate the insert script (with the data) for an existing table.
In Toad, we can generate the DDL for a particular table. Just curious if it can be done using any Tool.
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Dec 10, 2012
I have used the following statement to gather the stats of a table..
EXEC dbms_stats.gather_table_stats('APP','SALE_AMT',ESTIMATE_PERCENT=>100,CASCADE=>True);
To gather the stats it is taking one hour and the table SALE_AMT is having 237213998 records.is there any way to get the stats quickly.
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Oct 21, 2011
understand this stats from the TKPROF. The below stats is for INSERT SELECT statment.
Here what does Disk and Current values refer ?
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 0 0.00 0.00 0 0 0 0
Execute 1 1141.84 1117.85 1829639 517129893 1749 109
Fetch 0 0.00 0.00 0 0 0 0
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 1 1141.84 1117.85 1829639 517129893 1749 109
[code]...
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Aug 31, 2012
My tables are in ers_stg schema and code which collects state on these table are in etls_ers schema, what permission i need in order to get the stats collected from etls_srs schema. i am getting in sufficient privilege error.
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Nov 9, 2013
while doing stats collection weather system takes the backup of current statistics. i think we can specify stattab. but weather it takes stats backup before over writing? I got this requirement as a part of upgrade, i have already gone through export_schema_stats and import_schema stats already. Just trying all other possible options only.
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Sep 10, 2013
I am quiet confused with the optimizer collection stats job on 11g. when run the following query i see the statistics enabled.
SQL> select client_name, status from dba_autotask_client;
CLIENT_NAME STATUS
---------------------------------------------------------------- --------
auto optimizer stats collection ENABLED
auto space advisor ENABLED
sql tuning advisor ENABLED
I can gather statistics manually using DBMS_STATS, but there is no automated gathering of optimizer stats. how can i have system run and collect statistics on a daily bases?
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Sep 24, 2011
I have a stored procedure running in which there is a cursor which fetches around 1500000 records and then query another table using the fetched record values.
I cannot modify the procedure as its on production. I want to know which cursor record is currently being processed by the procedure, and how many are still remaining ? How to check the cursor stats at runtime. I want to check up to which record the cursor has been fetched and how many are still remaining. I have cursor name. Is there some dynamic view to check cursor stats at runtime ?
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