Mar 26, 2016 · From the 10g Oracle Database Application Developers Guide - Fundamentals, Chapter 5: In general, you should create an index on a column in any of the following situations: The column …

Feb 12, 2020 · How to use a hint on a query against a view to force Oracle to use an index on the base table? E.g View select emp_id from v_employees base table select emp_id /*+ INDEX(employees …

Jun 24, 2021 · 2 If index (or its partition) is in unusable state and rebuild doesn't help, I'd suggest you to drop the index, insert data (will be faster as Oracle won't have to maintain the index during insert) …

Apr 19, 2017 · I jotted down the following query which will list the index name and its columns for a particular table: select b.uniqueness, a.index_name, a.table_name, a.column_name from …

Apr 3, 2024 · If it's a UK/PK created using an existing index, Oracle won't allow the load at all with the index in an unusable state. You'd have to manually drop the index and recreate it. All things …

Mar 22, 2021 · I created an index called Z7 and I want to use it in a SELECT statement like this: SELECT * FROM Employees WITH (INDEX(Z7)) WHERE First_Name NOT LIKE ('J%'); But it shows …

May 17, 2018 · How can I list indexes columns readily defined in Oracle? And how do I use those indexes in a select statement? Something like: SELECT x, y, z FROM a WITH INDEX(x)...

Jun 2, 2014 · In Oracle, you can't mix both DDL and DML. In order to do so, you need to work it around with the EXECUTE IMMEDIATE statement. So, first check for the existence of the index. Second, …

We have a migration script that converts a LONG column to a LOB, and as mentioned in the Oracle migration guide, the index for the table now needs rebuilding. Assuming the table name is …

Dec 3, 2009 · There is an appropriate index on column_having_index, and its use actually increase performance, but Oracle didn't use it... You should gather statistics on your table to let optimizer see …