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What is a NULL value? What are the pros and cons of using NULLS ?
COBOL SQL Interview Questions
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What is a NULL value? What are the pros and cons of using NULLS ?
A NULL value takes up one byte of storage and indicates that a value is not presents as opposed to a space or zero value. It's the DB2 equivalent of TBD on an organizational chart and often correctly portrays a business situation. Unfortunately, it requires extra coding for an application program to handle this situation.
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