Oracle introduced theTRUNCATE TABLEstatement that allows you to delete all rows from a big table. The following illustrates the syntax of the OracleTRUNCATE TABLEstatement: TRUNCATETABLEschema_name.table_name [CASCADE] [[PRESERVE|PURGE]MATERIALIZEDVIEWLOG]] [[DROP|REUSE]]STORAGE]Code language:SQL (...
If the table definition file is valid, you can use theTRUNCATE TABLEstatement to recreate the table as an empty table, even if the data or indexes are corrupted. Syntax TRUNCATE [TABLE] table_name; Parameters Examples Completely truncate the tablea....
ALTER TABLE: to deallocate unused space from the table, a table partition, a table subpartition, the mapping table of an index-organized table, the overflow segment of an index-organized table, or a LOB storage segment (see ALTER TABLE) Syntax deallocate_unused_clause::= Description of the i...
Syntax truncate_table::= Description of the illustration truncate_table.eps Semantics TABLE Clause Specify the schema and name of the table to be truncated. This table cannot be part of a cluster. If you omit schema, then Oracle Database assumes the table is in your own schema. You ...
TRUNCATE [TABLE] tbl_name [WAIT n | NOWAIT] Contents Syntax Description WAIT/NOWAIT Oracle-mode Performance See Also Description TRUNCATE TABLE empties a table completely. It requires the DROP privilege. See GRANT. tbl_name can also be specified in the form db_name.tbl_name (see Identifie...
最近需要清理一张大表,要求不能影响性能。在MySQL里边我们可以通过借助coreutils以及硬链接的方式来最小化I/O,Oracle也可以通过分批次回收空间来最小化I/O,到底如何,下面我们拭目以待。 一、TRUNCATE TABLE 语法 TRUNCATE TABLE [schema_name.]table_name ...
This topic describes the supported conversion scope of ALTER TABLE DDL operations for truncating partitions during data migration from an Oracle database to an Oracle tenant of OceanBase Database. Syntax truncate_partition_subpart: TRUNCATE { partition_extended_names | subpartition_extended_names } ...
Logically, TRUNCATE TABLE is similar to a DELETE statement that deletes all rows, or a sequence of DROP TABLE and CREATE TABLE statements. To achieve high performance, TRUNCATE TABLE bypasses the DML method of deleting data. Thus, it does not cause ON DELETE triggers to fire, it cannot ...
Re: Truncate Table Syntax Error Mark Matthews November 06, 2007 05:49PM Sorry, you can't reply to this topic. It has been closed. Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent...
To truncate a table, you must either be thedatabase owneror the table owner. You cannot truncate system tables or global temporary tables with this statement.