Pl sql if inserting updating
These triggers provide a way of updating elements of the nested table. CALL foo (ora_login_user) / CREATE OR REPLACE PROCEDURE Before_delete (Id IN NUMBER, Ename VARCHAR2) IS language Java name 'thjv Triggers.before Delete ( CHAR)'; CREATE OR REPLACE TRIGGER Pre_del_trigger BEFORE DELETE ON Tab FOR EACH ROW CALL Before_delete (:old. Ename) Within a trigger body of a row trigger, the PL/SQL code and SQL statements have access to the old and new column values of the current row affected by the triggering statement.They fire for each nested table element being modified. Two correlation names exist for every column of the table being modified: one for the old column value, and one for the new column value.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).
-- 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.Example 39-6 shows an example of a trigger procedure in -- -- Main tables - time dimension and sales fact.-- CREATE TABLE time_dimension ( time_key integer NOT NULL, day_of_week integer NOT NULL, day_of_month integer NOT NULL, month integer NOT NULL, quarter integer NOT NULL, year integer NOT NULL ); CREATE UNIQUE INDEX time_dimension_key ON time_dimension(time_key); CREATE TABLE sales_fact ( time_key integer NOT NULL, product_key integer NOT NULL, store_key integer NOT NULL, amount_sold numeric(12,2) NOT NULL, units_sold integer NOT NULL, amount_cost numeric(12,2) NOT NULL ); CREATE INDEX sales_fact_time ON sales_fact(time_key); -- -- Summary table - sales by time.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.Once the trigger is created, entering the following SQL statement: A trigger is either a stored PL/SQL block or a PL/SQL, C, or Java procedure associated with a table, view, schema, or the database itself.