which method is more efficient in terms of performance to generate an auto increment number in oracle.
Step1
CREATE TABLE test
(id NUMBER PRIMARY KEY,
name VARCHAR2(30));
Step2
CREATE SEQUENCE test_sequence
START WITH 1
INCREMENT BY 1;
[code]....
I am switching database from access to oracle 11g. I have create all the required tables, but I am stuck at one point. The previous person who created access database had auto increment with SG0101, SG0102,........ In oracle I know we can auto increment primary keys but only with the numbers not with characters.
So I have customerid which is a primary key and it automatically increments the number, but I have one more column with memberid where I am inserting all the ids that start with SG0101 bla bla.....
I already have 800 member ID's that start with SG, but that value doesnt automatically increment because I dont have any sequence or trigger to do that.
So how do I create a sequence and trigger that will automatically start value with SG and keeps auto incrementing?
I have a table abc with name and phone_number columns in it,and this table contains 100 records. Now I want to add a column say ID as primary key for this and it should be auto incremented and should have primary key for the first 100 records as well.
View 8 Replies View RelatedStep1
CREATE TABLE test
(id NUMBER PRIMARY KEY,
name VARCHAR2(30));
Step2
CREATE SEQUENCE test_sequence
START WITH 1
INCREMENT BY 1;
Method1 Follow Step1 and Step2 and create a Trigger as below :
CREATE OR REPLACE TRIGGER test_trigger
BEFORE INSERT
ON test
REFERENCING NEW AS NEW
FOR EACH ROW
BEGIN
SELECT test_sequence.nextval INTO :NEW.ID FROM dual;
END;
/
Method 2 Follow Step1 and Step2 and directly have an insert statement as below:
INSERT INTO test (id, name) VALUES (test_sequence.nextval , 'Jon343');
Method 1, the Trigger is not getting created, however by following Method 2, I am able to generate auto-increment number.
I have already done auto increment by making sequence and trigger. but now the problem is when i am trying to retrieve data from that table it returns all data perfectly but the primary key that is my auto increment value shows blank.I am facing this problem with join query, there 4 table left joined in my query. But when I remove join from my query then it shows that value.
But i need that value in my join query.So, what is the problem and what can I do?And other thing is when I apply this query in Oracle SQL Developer, it works perfect.
My Query:
return $this->db->query("select * from TBL_EMPLOYEE_BASIC left join TBL_EMPLOYEE_DETAILS on TBL_EMPLOYEE_BASIC.EMPL_ID = TBL_EMPLOYEE_DETAILS.EMPL_ID left join TBL_EMPLOYEE_EDUCATION on TBL_EMPLOYEE_BASIC.EMPL_ID = TBL_EMPLOYEE_EDUCATION.EMPL_ID left join TBL_EMPLOYEE_EXPERIENCE on TBL_EMPLOYEE_BASIC.EMPL_ID = TBL_EMPLOYEE_EXPERIENCE.EMPL_ID where
[code]...
I'm trying to create a sequence for a primary key to simply auto-increment by the default of 1. I have a sql script written to generate mt tables, and I'm not sure how to modify the script to include the sequence. I also just want the sequence for a specific column, ie, PK, not the PK in all tables.
Here's a snippet from my script:
create table image
(
image_id int NOT NULL,
source_id int NOT NULL,
CONSTRAINT image_id_pk PRIMARY KEY (image_id),
CONSTRAINT fk_source_id FOREIGN KEY (source_id) REFERENCES source(source_id)
);
Would I add the create sequence statement right after the create table, and if so, how do I apply the sequence to only 1 table and a single column?
I need to generate random and unique 6 digit number in Oracle. I need to insert these numbers into a table. I tried using DBMS_RANDOM package, which generates random 6 digit numbers, but fails to generate UNIQUE numbers.
View 3 Replies View RelatedI am maintaining vehicles information of our company in our equipment master table and there is one field where I am storing one date ( Vehicle inspection due date) based on this date I want to generate auto email to concerned user like a schedule date is due and he needs to prepare his car for inspection .
This schedule will run on everyday basis and it will generate the email to concerned persons two days before. how I can setup this in oracle using Scheduler.
I have the following select query that works perfectly fine. Returns 25 rows based on the descending order of the price.But, I want add one more expression to this list of columns in this query (apart from customer_id).
the expression should look like Cust-01 for the first customer from the below query all the way to Cust-25 for the last customer.But how can I can generate 01 to 25 in oracle?
select customer_id from
(select customer_id from capitalPLAN
where member_status = 'MEMBER' AND customer_id NOT in ('156','201','1385','2125','3906','165')
order by price desc
)
where rownum <= 25
Need to generate auto number as below
A00001 to A99999. After A99999 it should begin with B00001 and ends with B99999. till Z99999 we need to generate.
I have set up a schema using a DDL script in Oracle 10g. I am linking this through to a Visual Basic 2008 fron end. The connection is fine. My database of is for a car hire company project.
I need to know how to create an auto increment for a primary key field, like Access does.
For example here is my table structure for my Rental_Payment table.
-- TABLE RENTAL_PAYMENT
CREATE TABLE RENTAL_PAYMENT (
PAYMENTNO NUMBER NOT NULL,
CARDNO NUMBER NOT NULL,
[Code]....
So for example the first record would appear as:
PAYMENTNO CARDNO AMOUNT CARD_TYPE
======== ===== ====== =======
01
I would then enter values and the next payment number would be 02 etc.
PAYMENTNO CARDNO AMOUNT CARD_TYPE
======== ===== ====== =======
01 123412 £40.00 VISA
02
Visual Basic will usually have a star (*) beside a new entry field so 02 will be
* 02
etc........
I have about creating a sequence. So how can I tie this to my table?
I have several databases that i've recently upgraded from 9i to 11g. With all of them, the automatic stats gathering process has worked just fine every night during the maintenance window.
However, i have this other database that i created and it seems that the only stats being gathered are on the sys and system schemas and not the actual schema that holds all of our tables.
I did some searching, but i'm not sure i was using the right search terms, because i came up empty.
BANNER
-----------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for Solaris: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
I am having a problem with auto populating different fields based on inventory no. field.. This is a bug giving to me to work on and i not able to figure out how to populate the other fields.
How to set any triggers for the items to auto populate and i am suppose to finish this work today.
I have 2 question....
1. i have a table and i want to pick data from one field randomly..
i write this query for this purpose...
SELECT SUBJECTIVE_QUES_PK FROM
(SELECT SUBJECTIVE_QUES_PK FROM PMS.SUBJECTIVE_QUES
ORDER BY SYS.DBMS_RANDOM.VALUE)
WHERE QUES_TYPE_FK=3
AND ROWNUM<=5;
2. can i write this query in forms 6i..
i know that this question not relevant but if i write it in forms section then i will be duplicate.
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".
how do you generate serial numbers? i have an invoice where i have to add items, so i want the numbering to start from 1 everytime i start a new form and increment by 1 as i i enter a new record. For this i have put my code in when-new-record-instance but problem is if i delete a record and enter a new one, the serial number starts from the nex number.
For ex. if i have 4 items with serial numbers 1, 2, 3, 4 and i delete the item at no. 3 and add a new item , the serial number comes as 5.
proper code to generate the serial numbers?
I need generate an unique number without sequence. I am using Oracle 11.2, here is the details. The column idSeq is unique withing one specific idType. I don't want a sequence for each idType.
create table tb_test (idSeq number(5), idType number(5), addr varchar2(256));
insert into tb_test
(select case when idSeq is null then 1 else max(idSeq)+1 end, 3, 'Main street');
I am having ORA-00937 : not a single-group group function error
Ive a requirement which ive overlooked for a while now as below,
On my tabular form i have fields: Empid as Select List and when the value is picked from this Select List EmpID i want the associated/corresponding phone# displayed in its TEXT FIELD in that same row,
apex 4.1.1/Oracle 11gR2,
also i tried the below as a workaround but it doesnt fulfill my requirement, [URL]....
How to generate a PAN number by concatenation of data from different tables
View 3 Replies View RelatedI want the query to generate the sequenctial number from 1 for the new financial year in some query.
View 6 Replies View Relatedgenerate 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
I have following requirement. Let say i have to generate a range based on "start number" and "end number" dynamically.Some kind of hash buckets.
e.g Start Number : 1 and End Number : 1001.
Also i want to divide that range based on some dynamic value like for above example 10 ranges of 100 each. and both 1 and 1001 should be included only once and the next row start number cannot be same as previous row end number.
Means
Range 1 1 -101
Range 2 102-200
Range 3 201-300
...
Range 10 901-1001
Is there any way of doing it automatically. I tried with Model clause. it works fine for even cases but for odd i have issues also when i take small start and end number i get an error.
SELECT case when ranges=1 then ranges else ranges+1 end Start_Id, ranges+round((1001-1)/10) End_Id
from
(
[Code].....
I want this to be generic for any values here 1 is Start Number 1001 is end number and 10 is the bucket. I need these parameters dynamic and want's the same kind of results for any values.
I need to generate random numbers from the range 71 million to 90 million. While generatind the same iam getting the value with decimal places.
How to generate with out decimal places ?
SQL> select ABS(dbms_random.value(71000000,90000000)) from dual;
ABS(DBMS_RANDOM.VALUE(71000000,90000000))
-----------------------------------------
87283730.7
I have a table called 'orders' and having date and time of order placed in the field timeplaced. I need to generate a report which is having hourly based number of orders placed . If no order is placed in an hour then it should show 0 for that hour in the result .
create table orders (order_id integer, timeplaced date,last_updated date);
Insert into ORDERS
(ORDER_ID,
TIMEPLACED, LAST_UPDATED)
Values
(1, TO_DATE('10/11/2011 12:53:39', 'MM/DD/YYYY HH24:MI:SS'), TO_DATE('10/11/2011 10:53:39', 'MM/DD/YYYY HH24:MI:SS'));
[code]........
But I need the result for all the 24 hours. Actually row for the hour 1,2,3,4,5,6,8,9,13-23 are not present in the DB
TO_CHAR(TIMEPLACED,'HH')COUNT(*)
00
10
20
30
40
50
60
71
80
90
102
111
122
130
140
150
160
170
180
190
200
210
220
230
I would like to generate HTML awr report and save it to my local machine.
After running $ORACLE_HOME/rdbms/admin/awrrpt.sql in sqlplus and specifying HTML in (Enter value for report_type: HTML) i hvae get numerous html code in my sqlplus prompt.. I want to save the html report in local machine and open it by double clicking on it.. it will be opened in a browser..
Is there any strcuture or fucntion that can make the table have something like rotation.I mean the record can be first in first delete.So,for example , even the table have limit row for example , 100 row .so, the new data can be replace the oldest row in the table auto and insert into the table .so the new row will replace the oldest 99 th row auto .the table still keep 100 row but the data can be update . Is it "partition" or other ??
View 8 Replies View RelatedI need to create a shell script to find the free space of an auto extensible tablespaces and send an alert when the free space is < 700MB. I tried checking with the dba_free_space, but I did not get the exact free space.
Tell me the logic to find the exact free space of autoextensible enabled tablespaces?
Is it possible to have auto stretch functionality (similar to Oracle ADF) in Oracle Forms?
The requirement is to adjust the data blocks/ canvases according to the window size automatically.
I know it is possible in Oracle ADF. But I want to achieve the similar kind of functionality in Oracle Forms.
when i try to run dbstart i got Message like "
ORACLE_HOME_LISTNER is not SET, unable to auto-start Oracle Net Listener
Usage: /u01/app/oracle/product/11.2.0/dbhome_1/bin/dbstart ORACLE_HOME
Processing Database instance "orcl": log file /u01/app/oracle/product/11.2.0/dbhome_1/startup.log
how to set oracle listener ? i tried using listener.ora file again show the same error
I want to export the oracle data into an excel sheet. I have written the code by using UTL_FILE package. but i am getting the output as shown in the screen shot(without formatting the column size as the width of the data it has). But I want the output column width to be set according to the size of the data automatically.
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