Define two ways to insert NULL values in column in relation?

1.	Define two ways to insert NULL values in column in relation?
Answer» DEFINE two ways to INSERT NULL values in COLUMN in RELATION? (1)Implicitly NULL:-Implicitly NULL values can be inserted by omitting a column from the column LIST (2)Explicitly NUL:-Explicitly NULL values can be inserted by specifying the NULL keyword in the VALUES clause

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