Weborder by primary_index_key_values; There are several way to execute CTAS to reorganize table; many of the options depend upon the version of Oracle and the particular configuration of the Oracle database. Parallel CTAS Running a create table as select (CTAS) in parallel can dramatically speed up SAP table reorganization. http://www.oraclefindings.com/2016/11/17/primary-key-custom-index/
CREATE TABLE - Oracle Help Center
WebCreate primary key with descending index. HaniYS Oct 22 2024. Hi. I use Oracle Enterprise 19, i have table with primary key 1 column as sequence, i need to change the index of primary key to be descending sorting rather than ascending sorting because most of query that i do from the table will be sort by primary key descending, any suggestion? WebSQL> drop index tbl_pk; drop index tbl_pk * ERROR at line 1: ORA-02429: cannot drop index used for enforcement of unique/primary key. Solution: To delete the index from the table you have to delete its constraint. As per the error-index is created with a unique/primary key. Check the name of the constraint and constraint type: the pacific lumber company scotia ca
Oracle: How to create a "reverse" index primary key?
WebMay 8, 2014 · It is entirely possible with later releases of Oracle to use a non-unique index to enforce a primary key constraint. An advantage of this strategy is the index remains if the constraint is, at some time dropped, provided the index was not created as part of the ‘add constraint’ statement. WebThe syntax of the DROP INDEX statement is simple as follows: DROP INDEX [schema_name.]index_name; Code language: JavaScript (javascript) First, specify an optional schema name to which the index belongs. If you omit the schema name, Oracle assumes that the index is in your own schema. Second, specify the name of the index that … WebYou can create a unique index with the option concurrently which will allow read and write access to the table while the index is created. However, building an index concurrently will take much longer then adding the index without that option. create unique index concurrently unique_id on the_big_table (id); Once the index is created, you can use that … shutdown task scheduler command