How do I delete a partitioned table in Oracle?

Use one of the following statements to drop a table partition or subpartition:

  1. ALTER TABLE DROP PARTITION to drop a table partition.
  2. ALTER TABLE DROP SUBPARTITION to drop a subpartition of a composite *-[range | list] partitioned table.

Does drop table delete partition?

DROP PARTITION command deletes a partition and any data stored on that partition.

How do I delete a split partition in Oracle?

Use the ALTER TABLE … TRUNCATE PARTITION statement to remove all rows from a table partition. The ALTER TABLE … TRUNCATE PARTITIONS statement does this for multiple partitions.

Can we drop hash partition in Oracle table?

You can drop partitions from range, interval, list, or composite *-[range | list] partitioned tables. For hash partitioned tables, or hash subpartitions of composite *-hash partitioned tables, you must perform a coalesce operation instead. You cannot drop a partition from a reference-partitioned table.

How do I drop all partitions in Hive table?

As of version 0.9. 0 you can use comparators in the drop partition statement which may be used to drop all partitions at once. Hive allows you to use comparison operators (e.g. > , < , = , <> ) when selecting partitions. For example, the following should drop all partitions in the table.

How do I drop a partition in SQL Server?

Using SQL Server Management Studio

  1. Expand the database where you want to delete the partition function and then expand the Storage folder.
  2. Expand the Partition Functions folder.
  3. Right-click the partition function you want to delete and select Delete.

Is commit required after drop table in Oracle?

Data definition language (DDL) statements that define or modify database objects. CREATE TABLE and DROP TABLE statements do not commit a transaction if the TEMPORARY keyword is used. (This does not apply to other operations on temporary tables such as ALTER TABLE and CREATE INDEX , which do cause a commit.)

Can we partition existing table in Oracle?

The ALTER TABLE… ADD PARTITION command adds a partition to an existing partitioned table. There is no upper limit to the number of defined partitions in a partitioned table. New partitions must be of the same type (LIST, RANGE or HASH) as existing partitions.

How do I drop multiple partitions?

You can remove multiple partitions or subpartitions from a range or list partitioned table with the DROP PARTITION and DROP SUBPARTITION clauses of the SQL ALTER TABLE statement.

Can we alter partition in Oracle?

Use the ALTER TABLE MODIFY PARTITION statement to modify existing attributes of a range partition or list partition. You can modify segment attributes (except TABLESPACE ), or you can allocate and deallocate extents, mark local index partitions UNUSABLE , or rebuild local indexes that have been marked UNUSABLE .

How do I drop a partition in hive external table?

This can be achieved as below.

  1. Alter external table as internal table — by changing the TBL properties as external =false.
  2. Drop the partitions — when you drop the partitions, data pertained to the partitions will also be dropped as now this table is managed table.
  3. Alter back the table as external=True.

How do I remove a partition from a table?

2 Answers

  1. DROP INDEX CIDX_X on X /* drop the clustered */
  2. CREATE CLUSTERED INDEX CIDX_X1 ON X(col1) ON [PRIMARY] /* Create another clustered index on the table to free it from the partitioning scheme; Here, the “ON [primary]” part is key to removing the partition scheme from the table !
  3. DROP PARTITION SCHEME PS1.

Is there a way to drop a partition in Oracle?

ALTER TABLE DROP PARTITION allows you to drop a partition and its data. If you would like to drop the partition but keep its data in the table, the Oracle partition must be merged into one of the adjacent partitions. Note: Far and away, the “drop partition” syntax is the fastest way to remove large volumes of data.

When do you Drop a table in Oracle?

If global indexes are defined on the table and the Oracle partition you want to drop is not empty, dropping the Oracle partition marks all the global, nonpartitioned indexes and all the partitions of global partitioned Oracle indexes as unusable. A table that contains only one Oracle partition cannot be dropped. You must drop the table.

How to drop a subpartition from a table?

Use one of the following statements to drop a table partition or subpartition: ALTER TABLE DROP SUBPARTITION to drop a subpartition of a composite *- [range | list] partitioned table To preserve the data in the partition, use the MERGE PARTITION statement instead of the DROP PARTITION statement.

How to drop a table partition without global indexes?

If the partition contains data and one or more global indexes are defined on the table, then use one of the following methods (method 1, 2 or 3) to drop the table partition. Issue the ALTER TABLE DROP PARTITION statement without maintaining global indexes.