SQL & PL/SQL :: How To Count Rows Of Partition Table
Apr 9, 2013
I have tried to execute this query
select partition_name, num_rows from dba_tab_partitions where table_name='Partisi_Book_Issue';
it display 0 num_rows. But i have made non partitioned table to partitioned table with the same number of rows. how to display number of record in each partition in any table?
The table tb_hxl_hash have two partitions,when i exchange the second partition,it raise error,why?
SQL> Alter Table tb_hxl_hash 2 Exchange Partition P_HS1 With Table tb_hxl_test;
Table altered.
SQL> Alter Table tb_hxl_hash 2 Exchange Partition P_HS2 With Table tb_hxl_test; Exchange Partition P_HS2 With Table tb_hxl_test * ERROR at line 2:ORA-14099: all rows in table do not qualify for specified partition
I think that performance better partition table than non-partition table. How to assure partition table is better than non-partition table at SELECT operation?
I have compare a specific query EXPLAIN PLAN at partition table and non-partition table. both tables data is same. Is it true way or not?
I have a table that partitioned into six partitions. each partitions placed in different table space and every two table space placed it on a different hardisk
when I will do query select with the non-partition keys condition, how the search process ? whether the sequence (scan sequentially from partition 1 to partition 6) or partition in a hardisk is accessed at the same time with other partition in other hardisk. ( in the image, partition 1,4 accessed at the same time with partition 2,5 and 3,6)
Can i alter the table to create partition on non partition table, i have tried and could not create it. Do we have some other means to do it as this is the live table and cannot drop them else will lose the data.
Can I add range sub partition to a hash partition table. Example like this.
CREATE TABLE test ( test_id VARCHAR2(10 ) , test_TYPE VARCHAR2(5) , CREATE_DATE date ) partition by hash (test_id, test_type) Partitions 3 SUBPARTITION BY RANGE (CREATE_DATE);
When Tried, I am getting syntax error as invalid option.
When I am trying to insert record from tbl_mittal into tbl_temp table. I am facing "ORA-14400: inserted partition key does not map to any partition" error
SQL> insert into tbl_temp select * from tbl_mittal; insert into tbl_temp select * from tbl_mittal * ERROR at line 1: ORA-14400: inserted partition key does not map to any partition
AS tbl_mittal is having hugh number of records so I am providing only few rows from tbl_mittal table as test data.
I need to get the number of rows based on one condition for certain time period. For example, writing a query for 3(any) hrs , i need to get the output as count of rows as hourly basis. Like these:
Date Time Count 12/08/2010 16:00 234 12/08/2010 17:00 345 12/08/2010 18:00 645
I want to create a SELECT, that shall give back only a special amount of rows, depending on the sum of one of the selected fields.
At first a code sample of the complete selection:
SELECT DISTINCT mnr, ktxt, (SELECT Sum(meng_4)FROM reldb d1 WHERE d1.mnr=d.mnr)qty FROM reldb d WHERE mnr IN (SELECT mnr FROM relac WHERE Lower(rlnr) NOT LIKE 'platte geprägt%') AND saext='M' ORDER BY qty DESC,ktxt;
This selection produces some lines of output (in my case i.e. like 300). What I want to see is only that much lines that the condition 'sum of all items listed below meng_4<=sum of all items meng_4 of the whole selection * 0.9' is fulfilled.
So, if the whole selection produces a total of 10000 as sum for all items meng_4, I want to see only that amount of rows that sums a total of at least 9000 for all items meng_4. I hope, this specification is exactly enough to understand my intent.
insert into t_target (...) select (fiels,fields,fiels) from sourcetable; commit;
i want to capture number of rows committed and assign it to a variable or insert it into a table, i can not rely on count of source table or t_target because both those tables are changing through out of the day/ data are being inserted and removed from those tables. is this possible
How to find the size pf a partition in a partition table?I guess we need to query views like dba_tab_partitions but I am not very sure. will running dbms_stats.gather_table_stats('schema_name,'table_name,'partition_name')
I have a I/R report with a checkbox is column 1 of each row using:
HTMLDB_ITEM.CHECKBOX (1,R.RESEARCH_ID, decode(:Pxx_SELECT_ALL_ROWS,'Y','CHECKED', decode(instr(nvl(:Pxx_SELECTED_IDS,0),R.RESEARCH_ID),0,NULL,'CHECKED')) ) AS select_flag
I want to use Javscript or a Dynamic Action to "count" how many selected rows there are, when a UPDATE button is pressed. Right now, the UPDATE button "submits" the page, then a page item computation runs the following code to get a count:
DECLARE v_cnt number(9); BEGIN v_cnt := 0; FOR i in 1..htmldb_application.g_f01.count LOOP v_cnt := v_cnt + 1; END LOOP; return v_cnt;
This works... but I dont want to submit (and rerun the report) just to get this count.
I have copied this loop into a Dynamic Action using the Click action of the UPDATE button, but it doesnt seem to recognize htmldb_application.g_f01.count .. so my value returns as 0.
I think that performance better partition table than non-partition table. How to assure partition table is better than non-partition table at SELECT operation?
I have compare a specific query EXPLAIN PLAN at partition table and non-partition table. both tables data is same. Is it true way or not?
I am trying to add partition to table without partition
with following code
ALTER TABLE ACC_LOC1_TAB ADD PARTITION testpart BY RANGE (ALT_AUTHDT) (PARTITION UPTO_2010 values less than (31-mar-2010), PARTITION APR_JUN_10 VALUES less than (30-JUN-2010), PARTITION JUL_SEP_10 VALUES less than (30-SEP-2010), PARTITION OCT_DEC_10 VALUES less than (31-DEC-2010), PARTITION JAN_MAR_11 VALUES less than (31-MAR-2011))
I am using Oracle 11.2.0.1 Oracle Database.I have a table with 10 Million records and it's a Non Partitioned Table.
1) I would like to partition the table (with partition by range ) without creating new table . I should do it in the existing table itself (not sure DBMS_ REDEFINITION is the only option ) (or) can i use alter table ...?
2) Add one partition which will have data for the unspecified range.
i have table with range partition and list sub-partition..can i add one more list sub-partition if it is not possible , i have to drop first sub-partition.
I want the number of UNITS with the Status EN/PL for AREA 3/6
ID 1 has area 3 and 6 but only EN so count 1 (no PL) ID 2 has area 6 but DR so no count ID 3 has area 3 and 6 for EN and PL so 1 for each ID 4 has area 6 three times and 3 once so count.
CREATE TABLE DAN_T1 ( ID varchar(8), AREA varchar(8), UNIT varchar(8), STATUS varchar(8) )
One of my colleaque gives the below informations. it displays table count information while gathering stats. But I dont know from which view he picked the historical information. pls let me know the view name to get this detail.
We have table, which maintain log record of gl table. I don't know how much data exist in that table but problem is taking too much time while counting whole records.
I'm trying to run a script that will sum column values from a table using only a certain period of time in example below only January submissions. However, some of those rows have the same date and I want to have the latest time row of that day in the count.
how to partition and index my table for a special problem.
The table:
CREATE TABLE TEST ( ID NUMBER PRIMARY KEY, U_VALUE NUMBER NOT NULL, -- Ranges from 0 - 30.000.000 O_VALUE NUMBER NOT NULL, -- Ranges from U_VALUE - 30.000.000 CREATE_TS TIMESTAMP DEFAULT SYSTIMESTAMP NOT NULL, UPDATE_TS TIMESTAMP NOT NULL, ITEM_TYPE NUMBER NOT NULL --<< Only 4 different values >> );
As you can see, U_VALUE is ALWAYS lower than O_VALUE.I need to have the CREATE_TS in either main- or subpartition do drop the partitions after some time so i don,t have to use DELETE statements. The table has 360 millions rows.
The application has only 8 query which will always use a WHERE clause like this:
SELECT * FROM TEST WHERE U_VALUE <= :1 AND O_VALUE => :2 AND ITEM_TYPE = :3
1. Is there any good technique how to create a good index for the queries (application will execute 120 queries per second)?