Updating index on oracle table Married mom cam

The index would be used to locate the rows to be updated.

The index is also a table in a manner of speaking, so if the indexed column is getting updated, it obviously needs to UPDATE the index as well.

To ensure this, add UPPER(supplier_name) IS NOT NULL to your WHERE clause as follows: If you forgot to collect statistics on the index when you first created it or you want to update the statistics, you can always use the ALTER INDEX command to collect statistics at a later date.It consists of only one field - the supplier_name field.We could also create an index with more than one field as in the example below: field.Being independent structures, they require storage space.You can create or drop an index without affecting the base tables, database applications, or other indexes.

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An index is a performance-tuning method of allowing faster retrieval of records.

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