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Is blob a real number?
yes blob is a real numberBLOB. The value is a blob of data, stored exactly as it was input. So it could be text or numbers.
Data type can store a variable amount of text or combination of text and numbers?
memo
What is a data type that can store variable amount of text or combination of text and numbers?
Memo
What is the value of data?
IMHO, the value of a set of data is based on the economic value that can be realized using that data, and the probability that someone will apply the data to realize that value. Is this the kind of answer you are looking for? If so, we could develop an example case.
What is the expression of error as a percentage of the value?
The expression of error as a percentage of the value is calculated by taking the absolute value of the error (the difference between the measured value and the true value), dividing it by the true value, and then multiplying by 100. The formula is: [ \text{Percentage Error} = \left( \frac{|\text{Measured Value} - \text{True Value}|}{\text{True Value}} \right) \times 100 ] This provides a way to express how significant the error is relative to the true value.
