THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Number and Decimal have identical representation. The Number Decimal type has a scale parameter but it is stored in the schema rather than in each tuple. Fields of these types are represented as a byte sequence containing the two's-complement binary value. Unlike all the other types here the bytes go in big-endian order. That is the most significant byte is at the very start of the sequence and the least significant byte is at its end.
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