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What is a check constraint?

A check constraint requires a value in the database to comply with a specified condition. A REF column by definition references an object in another object type or in a relational table. A REF constraint lets you further describe the relationship between the REF column and the object it references.

What are primary constraints?

Primary constraints are subject to the following restrictions: A table or view can have only one primary key. None of the columns in the primary key can be LOB, LONG, LONGRAW, VARRAY, NESTEDTABLE, BFILE, REF, TIMESTAMPWITHTIMEZONE, or user-defined type.

What is the difference between inline and out-of-line specification of check constraints?

The syntax for inline and out-of-line specification of check constraints is the same. However, inline specification can refer only to the column (or the attributes of the column if it is an object column) currently being defined, whereas out-of-line specification can refer to multiple columns or attributes.

What is a NULL constraint?

A NOTNULL constraint prohibits a column from containing nulls. The NULL keyword by itself does not actually define an integrity constraint, but you can specify it to explicitly permit a column to contain nulls. You must define NOTNULL and NULL using inline specification. If you specify neither NOTNULL nor NULL, then the default is NULL .

What Is None Specified Due To The Constraint Of Sticking To Generated Content Without Referring To Specific Brands Or Products.

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None Specified Due To The Constraint Of Sticking To Generated Content Without Referring To Specific Brands Or Products. Information

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3. https://github.com/scipy/scipy/issues/12310
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