Oracle plsql if updating pretty girls intimidating guys
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.
LAST_APPLIED_DATE,'DD-MON-YYYY'))/12 INTO years_since_last_applied FROM dual; -- Check whether years_since_last_applied is greater than 2 years or not IF (years_since_last_applied -- setting date format to to 'DD-MON-YYYY' alter session set nls_date_format = 'DD-MON-YYYY'; INSERT INTO job_openings VALUES (1,'Mark','Sharma',10,'01-JAN-2012'); INSERT INTO job_openings VALUES (2,'Praveen','Kumar',4,'01-DEC-2010'); INSERT INTO job_openings VALUES (3,'Rahul','Kohli',6,null); -- output 1 rows inserted. TRG_BEFORE_EMP_UPDATE' -- Try to update last_Applied_Date which is less than 2 years UPDATE job_openings SET LAST_APPLIED_DATE = '10-JUN-2016' where APPLICATION_ID = 3; -- error Error report - ORA-20000: Previous application attempt must not be done in last 2 years. TRG_BEFORE_EMP_UPDATE", line 15 ORA-04088: error during execution of trigger 'SYSTEM. UPDATED_DATE := sysdate; END; -- setting date format to to 'DD-MON-YYYY' alter session set nls_date_format = 'DD-MON-YYYY'; INSERT INTO person_records VALUES (101,'Devil','Khedut',sysdate,null,null); INSERT INTO person_records VALUES (102,'Kanji','Yadav',sysdate,null,null); -- output 1 rows inserted. CREATE TABLE bank_transactions_audit ( TXN_ID number(10), TXN_NUMBER varchar2(20), PARTY_NAME varchar2(50), TXN_DATE date, CREATED_BY varchar2(20), CREATED_DATE date ); --Creating Trigger CREATE OR REPLACE TRIGGER trg_before_update_txn_audit BEFORE UPDATE ON bank_transactions FOR EACH ROW BEGIN -- Insert OLD values in audit table for logging purpose INSERT INTO bank_transactions_audit VALUES(: OLD.
Trigger names do not need to be unique with respect to other schema objects, such as tables, views, and procedures.
For example, a table and a trigger can have the same name (however, to avoid confusion, this is not recommended).
Oracle automatically executes a trigger when a specified event takes place, which may be in the form of a system event or a DML statement being issued against the table.
Triggers can be: Trigger names must be unique with respect to other triggers in the same schema.
SALARY ,sysdate, username); END; 50000, fire after update trigger, insert into log UPDATE employee_salary SET SALARY = '70000' WHERE emp_id = 101; UPDATE employee_salary SET SALARY = '100000' WHERE emp_id = 301; -- new salary - old salary Dhaval Dadhaniya is a software engineer by profession and reader/writter by passion.
If a triggering statement includes a column list, the trigger is fired only when one of the specified columns is updated. Optionally, a trigger restriction can be included in the definition of a row trigger by specifying a Boolean SQL expression in a procedure can be either a PL/SQL or a Java procedure that is encapsulated in a PL/SQL wrapper.
It works, but it won't tell you if the value changed, only that the column is being updated (even if the update doesn't change the value).
Many applications update all of the columns in a table -- setting them to their old value, rather then trying to figure out exactly which columns have been updated by the client. Let's look at a simple example: create or replace trigger test_trigger 2 after update of x,y on test 3 for each row 4 begin 5 if updating( 'X' ) then 6 dbms_output.put_line( 'X is being updated' ); 7 end if; 8 9 if updating( 'Y' ) then 10 dbms_output.put_line( 'Y is being updated' ); 11 end if; 12 end; 13 / Trigger created. You can use updating (column) but it will only tell you that the column itself is being updated and not if the value has changed.
There are 2 syntaxes for an update query in Oracle depending on whether you are performing a traditional update or updating one table with data from another table.
You can also perform more complicated updates in Oracle.
When using an interactive tool, a single slash (/) on the last line is necessary to activate the 0) DECLARE sal_diff number; BEGIN sal_diff := :- :old.sal; dbms_output.put('Old salary: ' || :old.sal); dbms_output.put(' New salary: ' || :new.sal); dbms_output.put_line(' Difference ' || sal_diff); END; / keyword if you want the trigger to query or change the same table, because triggers can only do that after the initial changes are applied and the table is back in a consistent state.