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Data Types and Representations
This explains the concept possible representation, abbreviated possrep, and explains how these can be used in conjunction with constraints to define types.
Example: A Type Definition
TYPE SID POSSREP SID {C CHAR
CONSTRAINT LENGTH(C) <= 5
AND
STARTS_WITH(C, 'S')
IS_DIGITS (SUBSTRING(C, 1)))
} ;
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Rephrase Conditional Control Statements When computing a logical expression, the PL/SQL uses short-circuit evaluation. That is, the PL/SQL stops evaluating the expression as s
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Hi,am developing a library system and relating all the table is somehow complex,could you kindly assist me
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