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Updating a Variable
Assignment of an attribute value in a variable of a structured type
Synatx:
SET SN.C = 'S2';
As in Example the entire statement is equivalent to a regular assignment, in this case
SET SN = SID ().C ('S2');
Semidifference and NOT - SQL In this section first describe the relational difference operator, named MINUS. Example here shows SQL's closest counterpart of that operator.
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