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7.8

Change datatype from varchar2 to date

Asked by sikyala in Oracle Database

Tags: change, date, data

I am trying to change a field from varchar2 to date datatype. However, I keep getting an error that the column must be empty. The table has over 10,000 records.

sample of some data:

01/Mar/1996
01/Feb/1996
01/Jan/1996

Here is the workaround I have been trying.

alter table ntiac_table add

(publication_date_copy date) ;

update ntiac_table
set publication_date_copy=publication_date;

alter table ntiac_table set unused column

publication_date;

alter table ntiac_table drop unused columns;

alter table ntiac_table rename column

publication_date_copy TO publication_date;

I thought this would work because it worked when I changed a datatype of another field from varchar2 to number. However, when I run the above code I get an error after the following code is run:

update ntiac_table
set publication_date_copy=publication_date;

ORA-01841: (full) year must be between -4713 and +999, and not be 0

Could someone please provide a solution

View the Solution FREE for 30 Days

20091021-EE-VQP-81

Change datatype from varchar2 to date

Asked by sikyala in Oracle Database

Tags: change, date, data

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