Need to validate the timestamp in sql

Question

Hi,
I need to check whether the date column is having timestamp or not. Please give me the query to validate it.
Eg
row1 readtime
1 1/28/2012 4:00:00 PM
2 1/16/2012
I need to vaidate and find the record which is not having the timestamp. Please help me in finding the query for this.
If i use the to_char the value for the date which is not having the time is shown like this '16/01/2012 12:00:00 AM'.
So kindly help me in finding the query for this.
Thanks,
Suresh P

Answer 1

907893 wrote:
Hi,
I need to check whether the date column is having timestamp or not. Please give me the query to validate it.
Eg
row1 readtime
1 1/28/2012 4:00:00 PM
2 1/16/2012
I need to vaidate and find the record which is not having the timestamp. Please help me in finding the query for this.
If i use the to_char the value for the date which is not having the time is shown like this '16/01/2012 12:00:00 AM'.
So kindly help me in finding the query for this.Predicting you are storing the data in a Varchar column, below suggestion should help:
with data as
  select '26-Sep-2012 11:30:00' col from dual union all
  select '26-Sep-2012 11:30:00 AM' col from dual union all
  select '26-01-2012 11:30:00' col from dual union all
  select '26-SEPTEMBER-12 11:30:00' col from dual union all
  select '26-Sep-2012' col from dual
select *
  from data
where not regexp_like(col, '[[:digit:]]{1,2}-([[:alpha:]]{1,9}|[[:digit:]]{1,2})-([[:digit:]]{2}|[[:digit:]]{4}) [[:digit:]]{2}:[[:digit:]]{2}:[[:digit:]]{2}');If you are using a Date or Timestamp column, it will always have a Time Component stored and you would not be required to perform additional checks.
See below:
drop table test_table;
create table test_table
  col       timestamp
insert into test_table values (to_timestamp('26-Sep-2012 11:30:00', 'DD-Mon-YYYY HH24:MI:SS'));
insert into test_table values (to_timestamp('26-Sep-2012', 'DD-Mon-YYYY'));
select *
  from test_table;
COL                      
26-SEP-12 11.30.00.000000000 AM
26-SEP-12 12.00.00.000000000 AMEdited by: Purvesh K on Sep 26, 2012 11:47 AM