How do you truncate a table in Oracle?

How do you truncate a table in Oracle?

To truncate a table, the table must be in your schema or you must have the DROP ANY TABLE system privilege. To specify the CASCADE clause, all affected child tables must be in your schema or you must have the DROP ANY TABLE system privilege. Specify the schema and name of the table to be truncated.

How do you truncate a table in PL SQL?

The TRUNCATE TABLE statement is used to remove all records from a table in Oracle. It performs the same function as a DELETE statement without a WHERE clause. Warning: If you truncate a table, the TRUNCATE TABLE statement can not be rolled back.

How do you fix Ora 00054 resource busy and acquire Nowait specified or timeout expired?

Resolving the problem

1. Find and stop the session that is preventing the exclusive lock.
2. In Oracle 11g you can set ddl_lock_timeout, for example, allow DDL to wait for the object to become available, simply specify how long you would like it to wait: SQL> alter session set ddl_lock_timeout = 600; Session altered.

How do I fix error ORA 00054?

To avoid seeing Error ORA-00054? in the future, practice the following tips: Execute DDL during off-peak hours when the database is idle, such as late at night. Execute DDL during a maintenance window when all the end-users are locked out. Identify and kill the session that is preventing the exclusive lock.

What is truncating a table?

Removes all rows from a table or specified partitions of a table, without logging the individual row deletions. TRUNCATE TABLE is similar to the DELETE statement with no WHERE clause; however, TRUNCATE TABLE is faster and uses fewer system and transaction log resources.

How do I truncate a SQL view?

Your approach (using special stored procedures) is the only way the do it because TRUNCATE TABLE (Transact-SQL) only works on tables, not views. I guess you have a specific reason (faster and uses fewer system and transaction log resources) to use TRUNCATE over DELETE, since you have the DELETEs working on the views.

How do you truncate a procedure?

In Oracle, TRUNCATE command is a DDL statement, so you can not execute it directly in Oracle Procedure. To execute DDL commands in Oracle procedure, use EXECUTE IMMEDIATE statement. The below is an example of truncating a table in Oracle procedure using Execute Immediate command.

Can we truncate table in stored procedure?

A stored procedure can be used to truncate a table and overcome the FOREIGN KEY restriction. This is accomplished by including drop/create foreign key SQL with the TRUNCATE TABLE statements.

How do you unlock a table in Oracle SQL Developer?

Unlock An Oracle Table

1. Get the object ID of the locked table: SELECT object_id FROM dba_objects WHERE object_name=’YOUR TABLE NAME’;
2. Get the SID values for this ID: SELECT sid FROM v$lock WHERE id1=OBJECT ID FROM STEP1.
3. Get the session values for these SIDs:
4. Kill the sessions causing the lock:

How do I know if a table is locked in Oracle?

You can check table lock from v$lock and dba_objects view. Below query will give you the lock details. Select the session id and kill the process which is holding the lock on schema user.

What is the syntax of truncate?

The SQL TRUNCATE TABLE command is used to delete complete data from an existing table. You can also use DROP TABLE command to delete complete table but it would remove complete table structure form the database and you would need to re-create this table once again if you wish you store some data.

What is the syntax of truncate in SQL?

TRUNCATE TABLE removes all rows from a table, but the table structure and its columns, constraints, indexes, and so on remain. To remove the table definition in addition to its data, use the DROP TABLE statement.