how can i speed up insert into.
Becuase when i used create table a as select * from table1;
for five rows only
Elapsed: 00:00:2.19
is faster then insert into a select * from table1;
Elapsed: 00:00:15.19
We have a large table of equally sized data blobs in our Oracle system and we'd like to select the whole table once into the memory. The corresponding tablespace is stored in SSD fast disks and is managed by ASM. However the achievable select speed (reading data into memory) of Oracle is not satisfactory. When we store the data in SSD disk using custom methods (e.g. in SQLite DB files) and load then into memory by multithreading (8 thread) techniques, the speed is more than 15 times that of Oracle.
Is there any way to optimize the oracle and ASM for increased full table select in our case. We tried FULL TABLE SCAN and PARALLEL hints and DB_FILE_MULTIBLOCK_READ_COUNT too, but with no success.
FYI:Our data blob is about 4.2kB and each DB_BLOCK_SIZE is 8kB. The ASM segment is configured for AUTO-ALLOCATE. The table is partitioned by HASH. Our oracle system is not RAC.
Is there anyway to speed up the performance of the go_record built it or is there an alternative way to do it.
I have a table with nearly 30,000 rows and I would like to implement a text field that will allow the user to jump to a specified record. The only problem is if they try to jump too far away it will take a long time to load (beginning to end of 30,000 takes over a minute).
This problem doesn't arise if all the records, or up to the one they are jumping to, have been fetched already, but even if I fetch all records at the beginning it will still take a long time to initially load them.
I am gathering stats by using below block i.e., for some 3 million records and there are 6 indexes on the table. What is the relevance of value 4 here (i.e., method_opt => 'FOR ALL INDEXED COLUMNS SIZE 4')? If I increase 4 to 250 will there be any speed change in gathering stats. My intention is to speed up the gathering of stats.
begin
dbms_stats.gather_table_stats(
ownname => SYS_CONTEXT('USERENV', 'CURRENT_SCHEMA'),
tabname => 'LEGAL_VIEW_TARGET',
method_opt => 'FOR ALL INDEXED COLUMNS SIZE 4',
cascade => TRUE
);
END;
How To Increase Data Retrieval / Insertion Speed my data base has more than 0.5 million records Forms Some Time Respond Very Slow .
View 8 Replies View RelatedI have two design alternatives and need to understand how expensive (speed) is one of them against the other for a medium size table (100K-200K records):
create table xyz
(
f1 number not null,
f2 varchar2(20) not null,
f3 number not null,
f4 varchar2(50),
[code]....
the idea is to optimize the design by using a PK instead of the 3 keys and there is a debate that searching a unique index field(2nd scenario) is of the same speed than searching a PK field (1st scenario).
I've got a query running a select count (*) over a table. The default plan takes in the order of 15 minutes to return, a hinted plan to use a different index takes 3 minutes to return.
Unfortunately I cant get at the index stats and a few other areas which I suspect may be key here.When running autotrace against the two queries I see fairly different values as one would expect.
Query
select count (*) from fulfilmentitem bfi where created >= sysdate-30 AND bfi.status = 'FA' AND bfi.fulfilmentmethod = 'D'
Slow run
PLAN_TABLE_OUTPUT
-----------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)|
----------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 15 | 33119 (1)|
| 1 | SORT AGGREGATE | | 1 | 15 | |
|* 2 | TABLE ACCESS BY INDEX ROWID| FULFILMENTITEM | 12525 | 183K| 33119 (1)|
|* 3 | INDEX RANGE SCAN | IDX_FULFIL_METHODSTATUS | 250K| | 1786 (1)|
----------------------------------------------------------------------------------------------
[code]....
IDX_FULFIL_METHODSTATUS is across FULFILMENTMETHOD & STATUS in that order.
IDX_BFI_CREATED is on CREATED and is approx 70% of the size of the other index
The row counts estimated in the explain plan are out, the count(*) comes in at 32.8k rows.As you will have seen, the fast run shows a pretty significant consistent get increase compared to the slow run and a decent though not dramatic physical read drop.
My uncertainty is around if these changes in consistent get/phys read values would typically be enough to suggest the real time improvements I'm observing or if other (albeit perhaps temporary) factors are involved. It is a prod OLTP environment so the data will be rapidly changing and that may be a factor.
I know it can never be an exact science without intimately knowing the hardware/current loads etc but I also know that there's enough experience on these boards to have a loose handle on if the time shifts between queries are likely (or not) to be reflective of the stat changes or if those differences alone shouldn't (or typically wouldn't account) for it.
I'm thinking about instructing the query to ignore its original plan but am hesitant to do so without being a little more confident that it's not just a timing thing or something other than the change of index approach which may be causing the improvement. the autotrace stat changes observed I couldn't put my hand on heart say "yup - that change is good, ignore the default index all the time for this job".
We have taken export expdp backup from prod database (primary database- Data Guard).
1.) Import impdp is very slow 10GB/Hrs on staging database (Data Guard MAXIMUM AVAILBILITY)Since Server configuration, database version and configuration, operating system everything are same as production. No blocking, locking or waiting sessions
2.)import impdp is fast 90GB/Hrs on Test standalone database and this test database is running in NOARCHIVE LOG mode with oracle standard version after that no more difference.
CPU,Memory,network and disk I/O are look normal while importing on both databases.why that much difference on import.
how to insert data in oracle table without writing insert statement in oracle 9i or above. i am not going to write insert all, merge, sqlloder and import data.
View 2 Replies View RelatedI wish to make this simple statement with Toad GUI
INSERT INTO EXCLUDE_xxx
VALUES ('xxx',
'xxx',
'xxx',
'xxx',
SYSDATE);
Insert record is greyed out. How to insert new rows with Toad (click click)?
when i tried to insert the details from oracle froms..the data inserts twice to the DB..
my table structure:
create table app_sri
(a_id integer primary key,
p_first_name varchar2(30),
p_last_name varchar2(20),
p_age number(3)
);
here a_id can be genarated through simple sequence(pid_seq)...
trigger on app_sri
create or replace trigger pid_trg
[Code]....
form insertion code..
Begin
insert into app_sri(null,'robo','Big',100);
commit
End;
the data inserted...but twice
what is the reason behind the double insertion?
INSERT INTO LKP_ASSET_LOCATION (LOCATION) VALUES ('AMERICA'S CUP VILLAGE')
View 2 Replies View RelatedIn 11g, When I am trying to insert the records with select insert option it is failing.
Below is my Query:
insert into table_1 select * from table_2
The above query is not inserting any records into table_1. But when i query select * from table it is returning records.
The same select Insert query is inserting records properly in 10g.
I'm trying to insert only a few columns (not all of them) from temp_ioi_010209 into mtl_system_items_interface. Both of these tables have more columns than just the 7 I'm specifying but everything I found under INSERT ALL here makes me think I'm doing it right. According to the DESCRIBE of mtl_system_items_interface the only non-nullable column is set_process_id and I'm specifying that one...
Why I'm getting the error "ORA-00947: not enough values"?
INSERT ALL INTO mtl_system_items_interface
VALUES
(process_flag,
transaction_type,
set_process_id,
[code].......
If i inserted the values in table it gets inserting very few rows only.I dont know y it is?
View 15 Replies View RelatedCan we execute more than one insert statements at a time (eg 10) in database and givecommit at the end of insert statements or else give a commit one by one after each insert statements ?
View 8 Replies View RelatedI have imported a excel csv file into Oracle 10g but when I insert a new row it ad's it to the top off the column how can I get it to add the row to the end off column when I insert?
View 8 Replies View RelatedThe first problem I have is inserting data from one table to another WHILE incrementing a sequence:
Insert into PROG
(prog_cd, nm, typ_id, grp_id, clas_id, cat_id, shrt_nm, fl, prog_id)
values
((select one, two, three, four, five, six, seven, eight from LOAD), prog_seq.nextval);
I want to load the table PROG with the data in LOAD and increment a seq and put the value in prog_id, which is a field in PROG.
When I run it, I get:
ORA-00947: not enough values
, I'm trying to make a stored procedure in Oracle insertcion of records, but before you insert has to get the most code and generate a new one generated more than everyone else, I'm using Max, but as I assign to a variable as in SQL is:
Declare @ IDMax numeric
Select @ IDMax = Max (Code) From Members
Then I would make a:Insert into Users (Code, Name) values (@ IDMax, 'Victor');As serious for Oracle to perform com from declaring a parameter as the Code for me to store the value (Code Maximo)
How can I insert xml to clob ? I'm taking from database clob making it in xml type and when I want to insert xml type into clob field it calls and error:
Error(316,43): PL/SQL: ORA-00932: inconsistent datatypes: expected NUMBER got -
I have a table known as Registration in which there are columns StudentID, ModuleId, year, semester
semester = 1 or 2
I want to write a trigger so that student can register on a maximum of 4 modules per semester
i.e.
select count(*), semester from Registration where studentid='241234' group by semester
I tried the following trigger but I am stuck
If I dont use "for each row", I am not allowed to use :new and ld and when I use "for each row", count would be for each row which would be 1 or 0
create or replace trigger checkmodulecount
before insert on Registration
DECLARE
noCourse NUMBER;
nCount NUMBER;
FAILED EXCEPTION;
[Code]....
WHEN FAILED THEN
raise_application_error(-20000,'Cannot reigster for more than four courses');
END;
I am Hvg a table with two columns one is Emp_name Varchar2Another is age Number
i want a simple insert that should restrict the entry if the age exceeds 50
I am having trouble running a simple insert query in xe.
INSERT INTO UTHEMANG.CLIENT (F_NAME, L_NAME, STREET_ADDR, CITY, STATE_PROV, ZIP_PC, PHONE_NBR, E-MAIL, PASSWORD) VALUES ( 'John' , 'Doe' , NULL , NULL , NULL , NULL , NULL , 'someone@hotmail.com', '12345' );
I receive the following error message.
ORA-00917: missing comma
I can enter data via the point and click interface, but not at the SQL command.
Any way to write a function to parse through a clob and extract certain values to insert into a table. I've written the following and it compiles but it doesn't work.
create or replace function all_fields
(type_field VARchar2,
domain_field VARchar2)
return VARchar2 as
typefield VARchar2(100) :=type_field;
domainfield VARchar2(100) :=domain_field;
[Code]....
I have one query i have create one table T1 in this table i have this three colm (EMPNO,ENAME,HIREDATE) and i have to insert raw from this two table T2 and T3 in T2 table colms are (EMPNO,SAL) and T3 table colm are (EMPNO,MGRID) so which query i have to run
View 4 Replies View RelatedI have a read access on all the 200+ tables in a schema, How can i generate 200+ .sql files with insert statements on all the tables of schema.
View 13 Replies View RelatedFor a table tab the values are:
tab
id() value1 value2 value3 vale4 value5
001 state wb
001 year 2012
001 dist kol
001 age 27
Now I want to insert this data in another table tab1 and the output of that table will be
id value1 value2 value3 value4
001 wb 2012 kol 27
find out how i can insert the date like this.
10g
I have a table that mirrors remote table. Time info on the source table is in milliseconds (lowest value is 1338699905613)
I'd like to have the target table with DATE column as an addition to the source table columns.
I'm wondering what would be the way to calculate DATE value on insert?
The calculation should be from UTC (in milliseconds) into DATE.
The target table is :
test (ID NUMBER(19,0), STARTTIME NUMBER(19,0), RECORD_DATE DATE);
and data comes with insert from source table (mirror in remote db)
insert test (ID, STARTTIME) select id, STARTTIME from test_o
My following script worked to insert rows in Oracle SQL -
INSERT ALL
INTO EASY_DRINKS (DRINK_NAME, MAIN, AMOUNT1, SECOND, AMOUNT2, DIRECTIONS) VALUES ('Kiss on the Lips', 'cherry juice', 2, 'apricot nectar', 7, 'serve over ice with straw')
INTO EASY_DRINKS (DRINK_NAME, MAIN, AMOUNT1, SECOND, AMOUNT2, DIRECTIONS) VALUES ('Hot Gold', 'peach nectar', 3, 'orange juice', 6, 'pour hot orange juice in mug and add peach nectar')
[code].......
It worked but I have a few questions.
1. Is this the best way to Insert ALL? I mean can't I just name column names once and have it work for all rows IF I'm using all columns of the table? I tried but got errors,
2. Select 1 or * FROM DUAL - Why did it work when I selected 1 and not * from DUAL?
I have 2 object tables. Location and a department. Department references a location Object. But this wont insert. I get "0 rows created".
CREATE OR REPLACE TYPE location_objtyp AS OBJECT
(
locationID NUMBER,
name VARCHAR2(48)
);
/
CREATE OR REPLACE TYPE dept_objtyp AS OBJECT
(
deptID NUMBER,
name VARCHAR2(48),
locationID_ref REF location_objtyp
);
[code]...
This does not insert. I get no error. Only - "0 rows created".