What is an Index , Types od index why we are use index.
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Answer Posted / ravi saini
An index is a performance-tuning method of allowing faster
retrieval of records. An index creates an entry for each
value that appears in the indexed columns. By default,
Oracle creates B-tree indexes.
Create an Index
The syntax for creating a index is:
CREATE [UNIQUE] INDEX index_name
ON table_name (column1, column2, . column_n)
[ COMPUTE STATISTICS ];
UNIQUE indicates that the combination of values in the
indexed columns must be unique.
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