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Example of Shorthand for a row constraint
Example: Shorthand for a row constraint
ALTER TABLE EXAM_MARK
ADD CONSTRAINT Mark_in_range
CHECK (Mark BETWEEN 0 AND 100);
Actually, it's not quite the only way. The constraint can be included in the column definition for Mark in the CREATE TABLE statement for EXAM_MARK, as shown in Example. A constraint declared as part of a column definition is called a column constraint.
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heap sort program in pl/sql
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Count Operator in SQL Example: Counting the students who have scored more than 50 in some exam (SELECT COUNT (*) FROM (SELECT DISTINCT StudentId FROM EXAM_MARK WHE
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Selecting Objects: Suppose that you have run the SQL*Plus script below that creates object type Person and object table persons, and that you have settled the table: CREATE
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