Oracle if updating trigger
-- Creating TRIGGER CREATE OR REPLACE TRIGGER trg_before_emp_update BEFORE UPDATE OF JOB_EXPERIENCE, LAST_APPLIED_DATE on job_openings FOR EACH ROW DECLARE years_since_last_applied number(5); BEGIN years_since_last_applied := -1; IF(: NEW. He is working in a well reputed MNC as an applications Developer with 5 years of experience.LAST_APPLIED_DATE IS NOT NULL) THEN SELECT MONTHS_BETWEEN(TO_DATE(sysdate,'DD-MON-YYYY'), TO_DATE(: NEW. -- Try to update job_experience less than 3 years UPDATE job_openings SET JOB_EXPERIENCE = 2 where APPLICATION_ID = 1; -- error Error report - ORA-20000: Job experience must be more than or equal to 3 years. TRG_BEFORE_EMP_UPDATE", line 21 ORA-04088: error during execution of trigger 'SYSTEM. CREATE TABLE bank_transactions ( TXN_ID number(10) primary key, TXN_NUMBER varchar2(20), PARTY_NAME varchar2(50), TXN_DATE date, CREATED_BY varchar2(20), CREATED_DATE date ); --Creating bank_transactions_audit table. He have good understanding and knowledge of Java, Database, Spring, Hibernate and exploring other technologies related to Software development.However, when a view becomes more complex (multiple tables or views used in various join conditions to create the new single view), there is a good chance that many columns, as referenced by the view, lose their "updateable-ness." So, being the data dictionary view/table name trivia wizard that you are, you know to query the XXX_UPDATABLE_COLUMNS views, substituting USER, ALL or DBA for XXX as applicable.There are exceptions to this rule about views being inherently updateable.
It is worthwhile to note that this ORA-04091 error occurs not only in the "pure" database development environment, but also in the Oracle tools type of development environment such as Oracle SQL*Forms. UPDATE bank_transactions SET txn_number = 'NEWTXN8080' WHERE txn_id = 1; UPDATE bank_transactions SET txn_number = 'NEWTXN9595' WHERE txn_id = 2; -- output 1 rows updated. Dhaval Dadhaniya is a software engineer by profession and reader/writter by passion. CREATED_DATE); END; --Inserting values INSERT INTO BANK_TRANSACTIONS values ('1','TXN1234','Peter Thomas','12-MAY-2017','HR',sysdate); INSERT INTO BANK_TRANSACTIONS values ('2','TXN9999','Jemes Patel','10-JUN-2016','HR',sysdate); select * from BANK_TRANSACTIONS; --updating values.Mutating table errors only impact row level triggers.But to use a statement level trigger, some data may need to be preserved from each row, to be used by the statement level trigger.