Database Error

What This Error Means

This error occurs when the TO_DATE function is used to convert a string to a date in Oracle databases, but the string has more than one value. For example, trying to convert a string like '2022-01-01 12:00:00' to a date.

Why It Happens

This error is caused by passing a string with multiple values to the TO_DATE function, which expects only one value. This can happen when trying to parse a string that contains both the date and time components, or when using a date format that includes time.

How to Fix It

1. 1To fix this error, you can use the TO_TIMESTAMP function instead of TO_DATE, which can handle strings with multiple values. Alternatively, you can truncate the string to only include the date component using the SUBSTR function. Here's an example of how to do this:
2. 2// Before (broken code)
3. 3dateString = '2022-01-01 12:00:00';
4. 4date = new java.sql.Date(java.sql.Date.valueOf(dateString));
5. 5// After (fixed code)
6. 6dateString = '2022-01-01 12:00:00';
7. 7dateString = dateString.substring(0, 10);
8. 8date = java.sql.Date.valueOf(dateString);

Example Code Solution

String dateString = '2022-01-01 12:00:00';
java.sql.Date date = java.sql.Date.valueOf(dateString);

String dateString = '2022-01-01 12:00:00';
dateString = dateString.substring(0, 10);
java.sql.Date date = java.sql.Date.valueOf(dateString);