Oracle plsql if 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).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.

The Oracle UPDATE statement is used to update existing records in a table in an Oracle database.Visit Stack Exchange Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. Sign up to join this community CREATE OR REPLACE TRIGGER TRIGGER1 INSTEAD OF INSERT OR UPDATE OR DELETE ON PO_COSTED_BOM_V BEGIN UPDATE SRC_TBL SET CFG_VALUE = : NEW. CFG_NAME; IF SQL%NOTFOUND THEN INSERT INTO SRC_TBL (CFG_NAME, CFG_VALUE) VALUES(: NEW. CFG_VALUE); END IF; END; Detecting the DML Operation that Fired a Trigger If more than one type of DML operation can fire a trigger (for example, ON INSERT OR DELETE OR UPDATE OF emp), the trigger body can use the conditional predicates INSERTING, DELETING, and UPDATING to check which type of statement fire the trigger.Within the code of the trigger body, you can execute blocks of code depending on the kind of DML operation that fired the trigger: ... Instead you can check to see what columns are updated in the body of the trigger by using the UPDATING ('column_name') clause.create table Employee( 2 ID VARCHAR2(4 BYTE) NOT NULL, 3 First_Name VARCHAR2(10 BYTE), 4 Last_Name VARCHAR2(10 BYTE), 5 Start_Date DATE, 6 End_Date DATE, 7 Salary Number(8,2), 8 City VARCHAR2(10 BYTE), 9 Description VARCHAR2(15 BYTE) 10 ) 11 / Table created.

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