Pl sql if inserting updating were updating

Posted by / 16-Apr-2020 21:39

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. Example 39-5 shows an example of an audit trigger on a view in CREATE TABLE emp ( empname text PRIMARY KEY, salary integer ); CREATE TABLE emp_audit( operation char(1) NOT NULL, userid text NOT NULL, empname text NOT NULL, salary integer, stamp timestamp NOT NULL ); CREATE VIEW emp_view AS SELECT e.empname, e.salary, max(ea.stamp) AS last_updated FROM emp e LEFT JOIN emp_audit ea ON ea.empname = e.empname GROUP BY 1, 2; CREATE OR REPLACE FUNCTION update_emp_view() RETURNS TRIGGER AS $$ BEGIN -- -- Perform the required operation on emp, and create a row in emp_audit -- to reflect the change made to emp.-- IF (TG_OP = 'DELETE') THEN DELETE FROM emp WHERE empname = OLD.empname; IF NOT FOUND THEN RETURN NULL; END IF; OLD.last_updated = now(); INSERT INTO emp_audit VALUES('D', user, OLD.*); RETURN OLD; ELSIF (TG_OP = 'UPDATE') THEN UPDATE emp SET salary = NEW.salary WHERE empname = OLD.empname; IF NOT FOUND THEN RETURN NULL; END IF; NEW.last_updated = now(); INSERT INTO emp_audit VALUES('U', user, NEW.*); RETURN NEW; ELSIF (TG_OP = 'INSERT') THEN INSERT INTO emp VALUES(NEW.empname, NEW.salary); NEW.last_updated = now(); INSERT INTO emp_audit VALUES('I', user, NEW.*); RETURN NEW; END IF; END; $$ LANGUAGE plpgsql; CREATE TRIGGER emp_audit INSTEAD OF INSERT OR UPDATE OR DELETE ON emp_view FOR EACH ROW EXECUTE PROCEDURE update_emp_view(); One use of triggers is to maintain a summary table of another table.

Triggers can be: Trigger names must be unique with respect to other triggers in the same schema.

IF (TG_OP = 'DELETE') THEN delta_time_key = OLD.time_key; delta_amount_sold = -1 * OLD.amount_sold; delta_units_sold = -1 * OLD.units_sold; delta_amount_cost = -1 * OLD.amount_cost; ELSIF (TG_OP = 'UPDATE') THEN -- forbid updates that change the time_key - -- (probably not too onerous, as DELETE INSERT is how most -- changes will be made). = NEW.time_key) THEN RAISE EXCEPTION 'Update of time_key : % - % not allowed', OLD.time_key, NEW.time_key; END IF; delta_time_key = OLD.time_key; delta_amount_sold = NEW.amount_sold - OLD.amount_sold; delta_units_sold = NEW.units_sold - OLD.units_sold; delta_amount_cost = NEW.amount_cost - OLD.amount_cost; ELSIF (TG_OP = 'INSERT') THEN delta_time_key = NEW.time_key; delta_amount_sold = NEW.amount_sold; delta_units_sold = NEW.units_sold; delta_amount_cost = NEW.amount_cost; END IF; -- Insert or update the summary row with the new values.

-- 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.

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).

pl sql if inserting updating-63pl sql if inserting updating-29pl sql if inserting updating-70

You might omit this clause if you just want to record the fact that the operation occurred, but not examine the data for each row.

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