ORA-08469：must use the SIGN IS SEPARATE clause in mask options
错误码
错误描述：must use the SIGN IS SEPARATE clause in mask options
错误原因：A signed numeric entry with DISPLAY usage was converted using a non-defaulted character set and its PICTURE character-string contains an S. In these circumstances, a SIGN IS SEPARATE clause must be specified in the mask options.
解决方法：Either specify a valid SIGN IS SEPARATE clause in the mask options, use the defaulted character set, or don't specify an S in the PICTURE character-string.
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