convert character values to upper case : Before Event Trigger « Trigger « Oracle PL/SQL Tutorial

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Oracle PL/SQL Tutorial » Trigger » Before Event Trigger 
28. 6. 9. convert character values to upper case
SQL>
SQL> create table employee
  2          (
  3           empl_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          ,company_name           varchar2(50));

Table created.

SQL>
SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(1,'Jones','Joe','J','10 Ave','New York','NY','11111','1111','111', '111-1111','A Company');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(2,'Smith','Sue','J','20 Ave','New York','NY','22222','2222','222', '222-111','B Company');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(3,'Anderson','Peggy','J','500 St','New York','NY','33333','3333','333', '333-3333','C Company');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(4,'Andy','Jill', null,'93St','New York','NY','44444','4444','212', '634-7733','D Company');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(5,'OK','Carl','L','19 Drive','New York','NY','55555','3234','212', '243-4243','E Company');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(6,'Peter','Jee','Q','38 Ave','New York','NY','66666','4598','212', '454-5443','F Inc');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(7,'Baker','Paul','V','738 St.','Queens','NY','77777','3842','718', '664-4333','G Inc');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(8,'Young','Steve','J','388 Ave','New York','NY','88888','3468','212', '456-4566','H Associates Inc');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(9,'Mona','Joe','T','9300 Ave','Kansas City','MO','99999','3658','415', '456-4563','J Inc');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(10,'Hackett','Karen','S','Kings Rd. Apt 833','Bellmore','NY','61202','3898','516', '767-5677','AA Inc');

row created.

SQL>
SQL> insert into employee(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(11,'Bob','Jack','S','12 Giant Rd.','Newark','NJ','27377','3298','908', '123-7367','Z Associates');

row created.

SQL>
SQL>
SQL>
SQL>
SQL> create trigger employee_name
  2   before update or insert on employee
  3   for each row
  4  begin
  5    /* convert character values to upper case */
  6    :new.lastname := upper:new.lastname );
  7    :new.firstname := upper:new.firstname );
  8    dbms_output.put_line('trigger fired');
  9  end;
 10  /

Trigger created.

SQL>
SQL>
SQL> insert into employee
  2  (empl_no, firstname, lastname)
  3  values
  4  (3423'dave', 'anderson');

row created.

SQL>
SQL> select firstname, lastname
  2  from employee
  3  where empl_no = 3423;

FIRSTNAME       LASTNAME
--------------- --------------------
DAVE            ANDERSON

SQL>
SQL>
SQL> drop table employee;

Table dropped.

SQL>
SQL>
28. 6. Before Event Trigger
28. 6. 1. BEFORE EVENT triggers, are for preventing the event from actually happening
28. 6. 2. Insert before trigger
28. 6. 3. Check and change new value in a before-insert trigger
28. 6. 4. Fire a trigger before an update of the table
28. 6. 5. Change data in a before insert or update trigger
28. 6. 6. BEFORE INSERT OR UPDATE OF id
28. 6. 7. Check new value in before insert trigger
28. 6. 8. Check new value in before trigger
28. 6. 9. convert character values to upper case
28. 6. 10. Use trigger to create autoincrement column
28. 6. 11. Implementing Autonumbering Functionality
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