Trigger that logs actions for inserting actions : Inserting « Trigger « Oracle PL/SQL Tutorial

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Oracle PL/SQL Tutorial » Trigger » Inserting 
28. 16. 1. Trigger that logs actions for inserting actions
SQL>
SQL>
SQL>
SQL> create table employee
  2          (
  3           emp_no                 integer     primary key
  4          ,lastname               varchar2(20)    not null
  5          ,firstname              varchar2(15)    not null
  6          ,midinit                varchar2(1)
  7          ,street                 varchar2(30)
  8          ,city                   varchar2(20)
  9          ,state                  varchar2(2)
 10          ,zip                    varchar2(5)
 11          ,zip_4                  varchar2(4)
 12          ,area_code              varchar2(3)
 13          ,phone                  varchar2(8)
 14          ,salary                 number(5,2)
 15          ,birthdate              date
 16          ,hiredate               date
 17          ,title                  varchar2(20)
 18          ,dept_no                integer
 19        ,mgr              integer
 20        ,region           number
 21        ,division         number
 22        ,total_sales          number
 23         );

Table created.

SQL>
SQL>
SQL>
SQL> insert into employee(emp_no, lastname, firstname, midinit, street, city, state, zip,zip_4, area_code, phone, birthdate, title)
  2  values (1,'Gardinia','Joy','R','688 Ave','New York','NY','12122','2333','212','200-3393','12-nov-1956','President');

row created.

SQL>
SQL> insert into employee(emp_no, lastname, firstname, midinit, street, city, state, zip, zip_4, area_code, phone, salary, birthdate, hiredate, title, dept_no, mgr, region, division, total_sales)
  2  values (2,'Anderson','Lucy','J','33 Ave','New York','NY','43552','6633','212','234-4444',7.75,'21-mar-1951','1-feb-1994','Sales Manager',2,1,100,10,40000);

row created.

SQL>
SQL> insert into employee(emp_no, lastname, firstname, midinit, street, city, state, zip, zip_4, area_code, phone, salary, birthdate, hiredate,title, dept_no, mgr, region, division, total_sales)
  2  values (3,'Somers','Ingrid','E','12 Ave','New York','NY','76822','8763','212','867-6893',7.75,'14-feb-1963','15-mar-1995','Sales Clerk',2,2,100,10,10000);

row created.

SQL>
SQL> insert into employee(emp_no, lastname, firstname, midinit, street, city, state, zip,zip_4, area_code, phone, salary, birthdate, hiredate, title, dept_no, mgr, region, division, total_sales)
  2  values (4,'Washington','Georgia','J','13th Street','New York','NY','43122','4333','212','340-4365',11.50,'2-jul-1963','21-apr-1994','Designer',1,1,100,10,40000);

row created.

SQL>
SQL> insert into employee(emp_no, lastname, firstname, midinit, street, city, state, zip, zip_4, area_code, phone, salary, birthdate, hiredate, title, dept_no, mgr, region, division, total_sales)
  2  values (5,'Doright','Dudley','J','56 Langer Street','Staten Island','NY','23332','4983','718','777-4365',21.65,'15-may-1958','2-aug-1994','Designer',1,1,100,10,40000);

row created.

SQL>
SQL> insert into employee(emp_no, lastname, firstname, midinit, street, city, state, zip,zip_4, area_code, phone, salary, birthdate, hiredate,title, dept_no, mgr, region, division, total_sales)
  2  values 6,'Doright','Dorothy','R','56 Langer Street','Staten Island','NY','23332','4983','718','777-4365',24.65,'10-dec-1968','2-aug-1994','Designer',1,1,100,10,40000);

row created.

SQL>
SQL> insert into employee(emp_no, lastname, firstname, midinit, street, city, state, zip, zip_4, area_code, phone, salary, birthdate, hiredate, title, dept_no, mgr, region, division, total_sales)
  2  values 7,'Perry','Donna','R','1st Ave','New York','NY','44444','3444','212','111-6893',7.75,'14-feb-1967','15-mar-1995','Sales Clerk',2,1,100,10,40000);

row created.

SQL>
SQL> insert into employee(emp_no, lastname, firstname, midinit, street, city, state, zip, zip_4, area_code, phone, salary, birthdate, hiredate, title, dept_no, mgr, region, division, total_sales)
  2  values 8,'Roger','John','E','67 H Ave','New York','NY','33822','1163','212','122-6893',10.00,'14-jun-1956','15-mar-1995','Accountant',3,1,100,10,40000);

row created.

SQL>
SQL> insert into employee(emp_no, lastname, firstname, midinit, street, city, state, zip, zip_4, area_code, phone, salary, birthdate, hiredate, title, dept_no, mgr, region, division, total_sales)
  2  values 9,'Hall','Ted','R','1236 Lane','New York','NY','33823','1164','212','222-4393',13.00,'10-jun-1959','15-aug-1997','Sales Representative',3,1,100,10,50000);

row created.

SQL>
SQL> insert into employee(emp_no, lastname, firstname, midinit, street, city, state, zip, zip_4, area_code, phone, salary, birthdate, hiredate, title, dept_no, mgr, region, division, total_sales)
  2  values 10,'Barbee','Candice','L','400 Street','New York','NY','33811','2009','212','321-6873',12.00,'10-oct-1964','15-jan-1999','Sales Representative',3,1,100,10,35000);

row created.

SQL>
SQL>
SQL>
SQL> CREATE TABLE logitevent   VARCHAR2(400) );

Table created.

SQL>
SQL>
SQL> create or replace trigger tr_trans_log
  2  BEFORE INSERT OR UPDATE OR DELETE ON employee
  3  DECLARE
  4   v_msg  varchar2(200;
  5   PRAGMA AUTONOMOUS_TRANSACTION;
  6  BEGIN
  7   IF inserting THEN
  8      v_msg := ' Insert into employee @ ' || to_char(sysdate, 'mm/dd/yyyy hh:mi') || ' b' || user ;
  9   ELSIF updating THEN
 10      v_msg := ' Update of employee @ ' || to_char(sysdate, 'mm/dd/yyyy hh:mi') || ' b' || user ;
 11   ELSIF deleting THEN
 12      v_msg := ' Delete of employee @ ' || to_char(sysdate, 'mm/dd/yyyy hh:mi') || ' b' || user ;
 13   END IF;
 14   INSERT INTO logit VALUES(v_msg);
 15   COMMIT;
 16  END;
 17  /

Trigger created.

SQL>
SQL> drop table logit;

Table dropped.

SQL>
SQL> drop table employee;

Table dropped.
28. 16. Inserting
28. 16. 1. Trigger that logs actions for inserting actions
28. 16. 2. React to Inserting and Updating actions
28. 16. 3. If new value is null use the value from a sequence
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