ORA-01861: literal does not match format string

Question

When I try to execute this snippet:

cmd.CommandText = \"SELECT alarm_id,definition_description,element_id,
    TO_CHAR (alarm_datetime, \'YYYY-MM-DD HH24:MI:         


        

Answer 1

Remove the TO_DATE in the WHERE clause

TO_DATE (alarm_datetime,'DD.MM.YYYY HH24:MI:SS')

and change the code to

alarm_datetime

The error comes from to_date conversion of a date column.

Added Explanation: Oracle converts your alarm_datetime into a string using its nls depended date format. After this it calls to_date with your provided date mask. This throws the exception.