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SQL MCQs: SQL Objective Questions and Answers PDF Download
In SQL "all attributes" can be displayed by using the symbol
- ?
- ^
- &
- *
The output generated by the boolean expression 'true and unknown' is
- True
- False
- Unknown
- Null
The symbol ?*? is used to denote all the attributes in a relation, and is defined in the clause
- Select clause
- Define clause
- From clause
- Where clause
A powerful pattern matching operation named "similar to" was introduced in
- SQL:1997
- SQL:1998
- SQL:1999
- SQL:2000
In SQL, the output of a union operation automatically eliminates
- Non-Consistency
- Duplication
- Non-Integrity
- Unauthorization
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