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Return function
if i return 0 or other value mean that i return 0 value? hkw many type of return
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I'm not into "sql" but i'll give it a try. Yes, if you return 0, you are actually returning the "VALUE" zero(0). But sometimes it depends on what "return-type" a function/object has. For an integer function, it will return 0, for character it will return ASCII value 0(i.e. NULL character) and rest are just zeros