DECODE and substr function : DECODE « Conversion Functions « Oracle PL / SQL

1. Oracle PL / SQL
2. Conversion Functions
3. DECODE

DECODE and substr function

   
SQL>
SQL>
SQL> CREATE TABLE old_item (
  2       item_id   CHAR(20),
  3       item_desc CHAR(25)
  4       );

Table created.

SQL>
SQL> INSERT INTO old_item VALUES('LA-101', 'Can, Small');

1 row created.

SQL> INSERT INTO old_item VALUES('LA-102', 'Can, Large');

1 row created.

SQL> INSERT INTO old_item VALUES('LA-103', 'Bottle, Small');

1 row created.

SQL> INSERT INTO old_item VALUES('LA-104', 'Bottle, Large');

1 row created.

SQL> INSERT INTO old_item VALUES('NY-101', 'Box, Small');

1 row created.

SQL> INSERT INTO old_item VALUES('NY-102', 'Box, Large');

1 row created.

SQL> INSERT INTO old_item VALUES('NY-103', 'Shipping Carton, Small');

1 row created.

SQL> INSERT INTO old_item VALUES('NY-104', 'Shipping Carton, Large');

1 row created.

SQL>
SQL>
SQL> SELECT DECODE(SUBSTR(item_id, 1, 2),
  2                'LA', 'Western',
  3                'NY', 'Eastern',
  4                '* Unknown *'
  5                ) "Region",
  6         SUBSTR(item_id, 4,3) "Item ID",
  7         item_desc
  8  FROM   old_item;

Region      Ite ITEM_DESC
----------- --- -------------------------
Western     101 Can, Small
Western     102 Can, Large
Western     103 Bottle, Small
Western     104 Bottle, Large
Eastern     101 Box, Small
Eastern     102 Box, Large
Eastern     103 Shipping Carton, Small
Eastern     104 Shipping Carton, Large

8 rows selected.

SQL>
SQL> drop table OLD_ITEM;

Table dropped.

SQL>
SQL>
SQL>

   
    
  

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