truncate in teradata

Delete, Truncate, drop analysis for MySQLSame point:Truncate and delete without a WHERE clause, and drop deletes the data in the tableDifferent points1. Truncate and delete only delete data without deleting the structure of the table (definition)The drop statement will delete the structure of the table that is dependent on the constraint (constrain), trigger (trigger), index, and the stored procedure/functi

Tags: return database cleanup function LAN empty Comm Invoice statementTruncate is a unique keyword in Oracle! Its role is to clear a table, in the deletion of data, it has some differences with the delete, so that they can remember:1. Functionally, truncate is the content of a table, which is equivalent to delete from table_name.2, delete is a DML operation, truncate is a DDL operation, so, delete the enti

Tags: field HTTPS NIS logical counter Loader user Reference profileIf you want to quickly empty the table in MySQL, you can use the truncate command.Truncate is able to quickly and easily erase data without any differences. The syntax for using truncate in MySQL isTRUNCATE table [table Name]; The Truncate feature is also available in Salesforce. However, just pro

In the MySQL database, both the DELETE statement and the TRUNCATE TABLE statement can be used to delete data, but there are differences between the two statements, the following shows you the difference between the empty MYSQLL table content is common in two ways: a Delete, One is truncate. The DELETE statement without the Where parameter removes everything from the MySQL table, and you can also empty all t

Tags: occupancy integrity no process and BPA class insert data completeSame point:Truncate and delete without a WHERE clause, and drop will delete the data in the table different points: 1. Truncate and delete only delete data without deleting the structure of the table (definition)The drop statement will delete the structure of the table that is dependent on the constraint (constrain), trigger (trigger), index, and the stored procedure/function that

First: The same point: Truncate and delete with no WHERE clause, and drop deletes data in the table Second: Different points: 1 . Truncate and delete Deletes only the data do not delete the structure of the table (definition)The DROP statement deletes the table's structure-dependent constraints (constrain), triggers (trigger), indexes (index), and the stored procedures/functions that depend on the table

When the data in the table is not required, delete the data and release the occupied space. To delete the data in the table, use the delete statement or the truncate statement. I. Delete statements (1) conditional Deletion Syntax format:Delete [from] table_name [Where condition]; For example, delete data whose userid is '001' in the users table: delete from users where userid = '001 '; (2) unconditionally Delete the entire table data Synta

If the wicked have their own wicked, if there is a problem with the data in the database, or someone is in trouble, or your old man is unhappy with this data, in addition, when you want to destroy evidence (in fact, there will always be traces), you need to understand the delete Statement of MySQL.MySQL provides the delete and truncate statements to delete data. Definition of the delete statement: Most of the children who often deal with databases use

[Reprinted] the difference between the delete table and the truncate table is tabletruncate. The general syntax format for deleting data using the delete statement: Delete [from] {Table_name, view_name} [Where] Delete all row data in the XS table Delete XS After the execution, we found that the data in the XS table was deleted, but the table structure was still there. Truncate The

Original post address: http://hi.baidu.com/liyanlin84/blog/item/eb306616cdb51e1c972b4389.html Delete all data in the table, and you want to automatically increase the column from 1! Use truncate table tblname Truncate is a SQL statement used to delete data table content. It is used as follows:Truncate table [Table name].The following describes the methods and principles of the

Similarities and differences between truncate, delete, and drop Note: The delete statement is a delete statement without the WHERE clause. Similarities: Truncate, delete without WHERE clause, and drop both delete table data. Differences: 1. truncate and delete: delete only data. Do not delete the table structure (Definition) The drop statement deletes the constra

I have read some related posts and articles on the Internet, which are basically the same, but there are some differences in some places. Here I will summarize the differences between the two. 1. Delete generates rollback and related lock information. If you delete a table with a large data volume, it takes up a lot of rollback segments. truncate is a DDL operation and does not generate rollback. Truncate

Similarities and differences of Truncate,delete,dropNote: This digest is from Oracle Technical user discussion GroupSimilarities and differences of Truncate,delete,dropNote that the delete here is the DELETE statement without the WHERE clauseSame point: Truncate and delete with no WHERE clause, and drop deletes data in the tableDifferent points:1.

Tags: truncate usage in truncateoracle Truncate in OracleSyntax: TRUNCATE table table;You can delete all records in a table by using the TRUNCATE statement (DDL language). When you use the TRUNCATE statement to delete data, it is usually much faster than using the DELETE s

the difference between delete, truncate, and drop in OracleTags: deleteoracletable storage2012-05-23 15:12 7674 People read comments (0) favorite reports Classification:Oracle (2)Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.First, delete1, delete is DML, when you perform a delete operation, each time a row is deleted from the table, and the delete operation of the row is recorded in the

When the data in the table is not required, Delete the data and release the occupied space. To Delete the data in the table, use the Delete statement or the Truncate statement.I. delete statements(1) conditional DeletionSyntax format: delete [from] table_name [where condition];For example, delete data whose userid is '001' in the users table: delete from users where userid = '001 ';(2) unconditionally Delete the entire table dataSyntax format: delete

In this article, let's look at the python truncatemethod, before entering the article we may not know Truncate usageWhat, but in this article we will use Truncate statement InstanceTo let you know about the Truncate method in today's article. Overview The truncate () method is used to

Delete differs from truncate:1) Truncate is a DDL statement, and delete is a DML statement;2) Truncate speed is much faster than delete;The reason is that when we perform a delete operation, all table data is copied to the rollback table space first, and the amount of data varies over time. While truncate is directly d

Use the truncate TABLE statement to delete table data To delete all records in a large table, run the truncate command to release The data block tablespace used. This operation cannot be rolled back. Syntax format: Truncate table table_name Table_name indicates the name of the table to be deleted. Because the truncate