teradata truncate table

Tags: using SP strong data div on BS SQL MySQLTruncate use note due to the TRUNCATE TABLE a_table command once, take the lesson and record it as a warning!MySQL TRUNCATE TABLE a_table command affected result description, hands-on experience command TRUNCATE

Truncate table nameFast and efficient, because the truncate table function is the same as the DELETE statement without the WHERE clause: both DELETE all rows in the TABLE.However, truncate table is faster than DELETE and uses less

Tags: recover autonumber SQL Server from Run efficiency data ble cannot--Removes all data from the table, automatically numbering zeros.--1.delete from Biao--Removes all data from the table and automatically numbers the zeros.--2.truncate Table Biao--truncate Features:The--1

Today, when cleaning up business-Library data, developers say they can use TRUNCATE table to clean up all data from two tables Both tables have their own ID, all made table partitions, single table 200GB, two tables using SELECT ident_current (') The current self appreciation is 3000012, the two tables are almost ide

Tags: rop cat cut Media te Pro for a login SQL caseThe requirement for TRUNCATE permissions in an Oracle document is that a table is required under the currently logged-on user, or the currently logged-on user has the permission to drop any table.However, if the first condition is not met, the permission is too large for a user to satisfy the second condition.Refer to the discussion on the Web, you can use

Tags: blog ref tab BSP Tag Comment Original from Add table TRUNCATE TABLE wp_comments; Delete * from wp_comments; Where the table in the truncate operation can be omitted, the * in the delete operation can be omitted. Both of these are emptying the data in the Wp_

In Oracle, after delete is used to delete data, the storage capacity of the database is not reduced, and after a table is deleted using delete, the query speed of this table is the same as before deletion, it will not change. Because oralce has an HWM high water mark (or high water level line), it is the highest water level line used by a table in oracle. After t

Tags: differences between SQL rollback AMP Records Delete solutionPlease indicate the difference between delete from TableA truncate TABLE TableA in SQL ServerAnswer: Both can be used to delete all records in the table. The difference is that truncate is a DDL operation that moves the HWK so that the HWK value is 0 an

As we all know, drop table will seriously consume server I/O performance. If the size of the table to be dropped is large, it may even affect the normal online operation. First, let's take a look at why a table with a large drop capacity affects online services. Run drop table directly. mysql deletes all

Address: http://steve-111.iteye.com/blog/750326 A few days ago, I accidentally truncate a table, and the data in the table is very important. In addition, the table data is not backed up, and the data backed up is not the latest. For a moment, I do not know what to do. I have found a lot of information on the Internet,

Yesterday, successfully helped the customer recover a failed database. The reason for the failure is that the technician truncate several data dictionary tables in the database, which directly results in the database being unavailable. The database environment is an Oracle 9.2.0.7 RAC environment. The database is not backed up because of the large transaction volume of the database. Site inspection confirmed that the main truncated

ASSM level Three bitmap can be said to be the basic skills of DBA knowledge, here with the test method to verify the next level three bitmap principle. 1. The tables needed to establish the experimental environment Sql> create tablespace A1 datafile '/oracle/app/oracle/oradata/ora11/a1.dbf ' size 20m;Tablespace created.Sql> create user A1 identified by A1 default Tablespace A1;User created.Sql> Grant DBA to A1;Grant succeeded.Sql> Connect A1/A1Connected.Sql> CREATE

Tags: using SP for strong file data on Div BSAs we all know, TRUNCATE table can be used to delete the contents of the entire table, which is not the same as when the delete is behind the where condition. But beyond that, do we know that there are other differences between them? In this chapter we will discuss the differences between

1. Thedrop table name Eg:drop table dbo. Sys_test2.truncate table name eg:truncate table dbo. Sys_test3.Delete from table name where column name = value Eg:delete from dbo. Sys_test where test= ' Test 'Second, Drop,

First,syntax in SQL1. Thedrop table name Eg:drop table dbo. Sys_test2.truncate table name eg:truncate table dbo. Sys_test3.Delete from table name where column name = value Eg:delete from dbo. Sys_test where test= ' Test 'Second,dr

In the DBA's maintenance Management, index invalidation is a common problem, such as move, CTAs, swap partitions and so on will cause the index invalidation, the following experiment is to verify the drop partition, truncate partition partition on the local index and global index, in common, TRUNCATE TABLE tables are not invalidated by indexes. Basic Environment

At the same point, using drop Delete truncate will delete the contents of the tableDROP table NameDelete from table name (followed by the where statement, and all data in the table is also deleted)TRUNCATE TABLE nameDifferenceFirs

MySQL Tutorial clear table truncate and delete differences This article demonstrates how to use the truncate command, and the difference between delete and truncateHere's a list of all the data instances that are deleted from a MySQL table. TRUNCATE