SQL*Loader-00641：Invalid packed decimal nibble.\n
错误码
错误描述：Invalid packed decimal nibble.\n
错误原因：Each byte in a packed decimal field contains two 4-bit nibbles. Each nibble must have a valid value.
解决方法：Check the SQL*Loader control file's specifications against the log file to ensure that the field location was specified correctly. Check the contents of the field.
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