The safest and cleanest way to make this change is by creating a new table where Mark_Value is CHAR(18), then insert/select the contents of the original table into the new table (Ins into New_Table sel * from Old_Table).
If space is an issue and the original table is FALLBACK, you can alter...
NPARC (Named Pipe ARChive) is an NCR utility that transfers data between two Teradata systems. It is basically ARC using named pipes instead of tape, making data transfers much faster. The "donor" system runs an ARC DUMP into the pipes and the "receiver" system runs an ARC COPY with the pipes...
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