Changing the column value

Question

Hi,
I have to change the column values in a table. The values in the column are to be updated.
For e.g. If the old value is
"xxxxxxxxxx", I need to take that and update into "xxxyyyxxxx".
The column values is so long as its a description field, so its a combination of many other table fields. Its just I need to add one more field.
How can I do that? Any help appreciated.
Thanks

Answer 1

Hi,
See this:
I have got table with DESCRIPTION column which will be updated. Table structure is:
SQL> DESC SOLD_ITEMS;
Nazwa Wartość NULL? Typ
COMPONENT VARCHAR2(255)
SUBCOMPONENT VARCHAR2(255)
YEAR NUMBER(4)
MONTH NUMBER(2)
DAY NUMBER(2)
DEFECTS NUMBER(10)
DESCRIPTION VARCHAR2(200)
Table description contains values from (component, year, month, day & defects) column. I would like to add subcomponent value to this column.
SQL> SELECT * FROM SOLD_ITEMS;
COMPONENT SUBCOMPONENT YEAR MONTH DAY DEFECTS DESCRIPTION
graph bar 2006 4 3 10 graph 2006/4/3
graph bar 2006 4 1 1 graph 2006/4/1
search user search 2006 4 2 23 search 2006/4/2
search user search 2006 4 1 54 search 2006/4/1
search product search 2006 3 20 0 search 2006/3/20
search product search 2006 3 16 3 search 2006/3/16
6 wierszy zostało wybranych.
SQL> EDIT
Zapisano plik afiedt.buf
I use the SUBSTR and LENGTH function to place SUBCOMPONENT value between COMPONENT value and YEAR value. That's how I done it:
1 UPDATE SOLD_ITEMS
2* SET DESCRIPTION = SUBSTR(DESCRIPTION,1,LENGTH(COMPONENT)) || ' ' || SUBCOMPONENT || ' ' || SUBSTR(DESCRIPTION,LENGTH(YEAR))
SQL> /
6 wierszy zostało zmodyfikowanych.
SQL> SELECT DESCRIPTION FROM SOLD_ITEMS;
DESCRIPTION
graph bar 2006/4/3
graph bar 2006/4/1
search user search 2006/4/2
search user search 2006/4/1
search product search 2006/3/20
search product search 2006/3/16
6 wierszy zostało wybranych.
SQL> SPOOL OFF;
Peter D.