Oracle tutorial: How to create Id with AUTO INCREMENT in Oracle
oracle tutorial for beginners
sequence in oracle
identity key in sql
In this Oracle tutorial , we can create an auto increment field using ‘sequence’
object that can be assigned as primary keys.
Using Oracle ‘sequence’ object, you can generate new values for a column.
An Oracle sequence is an object like a table or a stored procedure.
CREATE SEQUENCE SYSTEM.MYSEQ
START WITH 1
CREATE OR REPLACE TRIGGER TR_CITY BEFORE INSERT ON CITY FOR EACH ROW
BEGIN SELECT LPAD(LTRIM(RTRIM(TO_CHAR(myseq.NEXTVAL))),10,'0') INTO :NEW.id FROM DUAL;
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Hi you can use below query ,
Example : 18121300001
SELECT TO_CHAR(SYSDATE,'YYMMDD')||LPAD(LTRIM(RTRIM(TO_CHAR(SEQ_NAME.NEXTVAL))),5,'0') FROM DUAL
Example : 1812131
SELECT TO_CHAR(SYSDATE,'YYMMDD')||SEQ_NAME.NEXTVAL FROM DUAL
Hello Sir, I am using the sequence object in my db, after deleting the data sequence is not maintained and ID column value is continue increasing. So, I want to know that if we delete the data from the table the sequence is maintained according to table?
i am getting an error
ORA-04071: missing BEFORE, AFTER or INSTEAD OF keyword
04071. 00000 - "missing BEFORE, AFTER or INSTEAD OF keyword"
*Cause: The trigger statement is missing the BEFORE/AFTER/INSTEAD OF clause.
*Action: Specify either BEFORE, AFTER or INSTEAD OF.
can you help??
Learning how to draw cartoon animals from the farm is not such a difficult task! Weve grown up surrounded by them! Farm animals are everywhere: In blockbuster movies, childs books, greeting cards. their shapes and images are printed in our minds!
In this section, I will show you how to determine what are the physical uniqueness of each animal and how to work with them. Then, you can practice drawing each cartoon character using basic shapes.
You will have the opportunity to make nice illustrations, practice sketching and cartooning using short easy lessons and complete your creation using a drawing software to create vector art if you want to! Cartoon drawing is really fun once you get into it!
Dont be afraid to try until you get it right. This method is really simple, but requires practice and observation. So, sit back and relax. Learn how to draw animals from the farm and start your journey on a good note!
Lets try s few basic characters to get started! :)
A cute turkey to begin with.
In this first tutorial, you can learn how to draw a fun turkey mostly made from small rectangles and large circular shapes. The posture of the character is really interesting. Not only is it easier to draw than a front version, but its also easier to add some perspective (as we can see with the legs). The fact that we just need to draw one wing is also interesting.
Most of these cartoon animals are not filled with complex textures or digital effects. In this case, the subject is filled with plain colors and only a few basic details (inside the tail) were added.
A nice turtle also from a side view.