1. dual is a table that contains a single row.
2. The dual table has one VARCHAR2 column named dummy.
3. dual contains a single row with the value X.
desc dual;Name Null? TypeDUMMY VARCHAR2(1)
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1. dual is a table that contains a single row.
2. The dual table has one VARCHAR2 column named dummy.
3. dual contains a single row with the value X.
desc dual;Name Null? TypeDUMMY VARCHAR2(1)
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