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Inserting leading zeros into oracle database field

Hi I have an oracle database with address and contact details on it. We recently did a change to one of the tables and to keep my data safe we did a csv extract.  The data was re-imported when the other work had been done, unfortunately no one chedked the csv telephone field and we have managed to strip out the leading zero's from the telephone number.  My sql is not good enough to write a script that will allow me to insert the leading zero without destroying the main body of the number. Can anyone help please?

Mike
the table name is unit and the field is called cellular_code

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202sqn
Asked:
202sqn
1 Solution
 
MilleniumaireCommented:
Assuming you want to update the data, try:

update unit
set cellular_code = lpad(cellular_code,'0',8)
where cellular_code is not null;

Where 8 is the required size of your cellular_code value.

You could test the statement using a select statement first:

select cellular_code, lpad(cellular_code,'0',8) new_cellular_code
from unit
where cellular_code is not null;
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flow01Commented:
If cellular_code is defined as varchar2 and
if you want 10 positions:

select lpad(cellular_code,10,'0')  from unit
where rownum < 100
/

update  unit set cellular_code = lpad(cellular_code,10,'0')
/
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DavidSenior Oracle Database AdministratorCommented:
Presumably you are not storing this as numeric, in which case it's simply masking the column to the desired display.
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202sqnAuthor Commented:
Thanks all for your input. I selected this as my answer as it is simple for me to understand thank you
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