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I am getting invalid number error message while executing the below select statement.Can any one have an idea about the issue..Please let me know.

select TO_DATE(TO_CHAR('2015/01/22 00:00:00','YYYY/MM/DD'),'YYYY/MM/DD')

actually i want oracle standard date format without time stamp for this date '2015/01/22 00:00:00'

select to_date('2015/01/22 00:00:00','YYYY/MM/DD HH24:MI:SS') as dt
from dual

Fiddle - http://sqlfiddle.com/#!4/6a3a6/1/0

As an FYI, the Oracle DATE data type does include the time component (just not down to fractional seconds, as is the case with the TIMESTAMP data type).

If you are converting values and want to bring all the time values to zero you can use the trunc function like this (which changes 12:07:00 to 00:00:00):

select trunc(to_date('2015/01/22 12:07:00','YYYY/MM/DD HH24:MI:SS'),'DD') as dt_with_time_zerod
from dual

Fiddle - http://sqlfiddle.com/#!4/6a3a6/2/0

If the source is itself a date and you want to convert the date to a string in the Oracle default date format ('DD-MON-RR') you can achieve that by running:

select to_char(trunc(to_date('2015/01/22 12:07:00','YYYY/MM/DD HH24:MI:SS'),'DD'),'DD-MON-RR') as dt_with_time_zerod
from dual

Fiddle - http://sqlfiddle.com/#!4/6a3a6/3/0

SQL error "ORA-01722: invalid number", . There are several alternatives to this function, such as using TRANSLATE, REGEXP_LIKE, and TO_NUMBER. ORA-01722: invalid number : In my previous article i have given the brief introduction about different errors like ORA-12154: TNS listener error and ORA-00600 which is related to internal error codes.The third most searched Error for oracle is ORA-01722 Error which is Invalid Number error. This error is searched approximately 25 k times per month in google search engine.In this article i will try to explain you why this error will come and how this error will solve.You will get this error

If it's a date field, to_char without a mask will give you what you say you want.

How to Resolve an Invalid Number Error When Using Oracle , , type_name and/or operand must be of (or evaulate to) a built-in datatype or collection type . An ORA-01722 error occurs when an attempt is made to convert a character string into a number, and the string cannot be converted into a number. Without seeing your table definition, it looks like you're trying to convert the numeric sequence at the end of your values list to a number, and the spaces that delimit it are throwing this error.

actually i want oracle standard date format without time stamp for this date '2015/01/22 00:00:00'

I'm not sure what you mean by "Oracle standard date format." The format in which a date would appear would be based on your NLS settings (in particular, NLS_DATE_FORMAT). If you are just trying to format this string representing a date, then you might want something like the following:

SELECT TO_CHAR(TO_DATE('2015/01/22 00:00:00','YYYY/MM/DD HH:MI:SS'), 'YYYY/MM/DD')
  FROM dual;

That is, you have the TO_CHAR() and TO_DATE() functions in the wrong order, and an incomplete date mask for the call to TO_DATE().

Alternatives to ISNUMERIC Function in Oracle - Querychat, The Oracle ORA-01722 error is thrown with the failure because of the outer query​. This is because it is trying to test the NUM > 0 condition first because it is  SQL> select '01-JUN-01' - 'abc' from dual; ERROR: ORA-01722: invalid number no rows selected How to fix it [ edit ] The fix depends upon the exact expression which caused the problem.

Try using date literals with the standard ISO 8601 format.

date '2015-01-22'

Oracle CAST Function Tips, An ORA-01722 error occurs when an attempt is made to convert a character string into a number, and the string cannot be converted into a  ORA-01722: invalid number. The first query worked since we *tend* to evaluate queries from the bottom up. We evaluated the x=2 part first and never tried to do 'abc' > 100. In the second query, the y>100 was evaluated first. Y was promoted to a number and then compared to 100. 'abc' could not be converted so ORA-1722.

I suggest you not to give hour-minute-second if you do not want to show the time.

This is my simplest answer :

SELECT TO_DATE('2015/01/22','YYYY/MM/DD') FROM dual

ORA-01722: invalid number tips, You'll get an error like this in your output: ORA-01722: invalid number. So, how can you resolve this if you're already trying to convert a value  Oracle implicitly converts the string to a number. So internally, the join predicate looks as follows: AND TO_NUMBER(fpov.profile_option_value) = hla.location_id Obviously, there is nothing that says that a VARCHAR2 column has to be a number.. and when it is not, it will fail with an "invalid number" exception.

Ask TOM "What is the error ORA-01722", ORA-1722 is Invalid number. We've attempted to either explicity or implicity convert a character string to a number and it is failing. This can happen for a number  Are you attempting to use a TO_NUMBER function, but getting an invalid number error? Learn how to resolve it in this article. What Is the Invalid Number Error?

Ask TOM "SQL problem [ORA-01722: invalid number]", Developers and DBAs get help from Oracle experts on: SQL problem [ORA-​01722: invalid number] Learn the cause and how to resolve the ORA-01722 error message in Oracle. You executed a SQL statement that tried to convert a string to a number, but it was

Oracle / PLSQL: ORA-01722 Error Message, Learn the cause and how to resolve the ORA-01722 error message in Oracle. You executed a SQL statement that tried to convert a string to a number, but it was unsuccessful. following error message will appear: ORA-01722: invalid number  ORA-01722 invalid number Cause: The attempted conversion of a character string to a number failed because the character string was not a valid numeric literal. Only numeric fields or character fields containing numeric data may be used in arithmetic functions or expressions. Only numeric fields may be added to or subtracted from dates.

Comments
  • Your sample query doesn't make much sense. Can you show us your actual production query?
  • The first parameter for TO_CHAR should be a non-character datatype - e.g. a date or a number.
  • Only if TO_CHAR() recognizes it as a date.
  • How could to_char not recognize a date field as a date?
  • I'm not sure what you mean by a date field. If you mean a value stored in a DATE column, then yes, TO_CHAR () will recognize it as a date. If you mean a string literal containing a date, then TO_CHAR() may recognize it based on the NLS settings in the DB.