Oracle : Ошибка ORA-09820

"Conversion of class string to numeric representation failed."
*Cause: ORACLE was unable to convert a class string to a number because
all of the characters in the string were not numeric.
*Action: Change the string to be either all numbers or all non-numeric
characters and repeat the conversion.

Попробовать перевести

Поискать эту ошибку на форуме