truncate in teradata

In the case of SQL table operations, we make the appropriate actions for different requirements.Let me compare the difference between the TRUNCATE table ' show ' and the drop table ' table name ' to learn from you.drop table ' table name '----We don't need this table, or this table is obsolete, delete, delete, dropTRUNCATE TABLE name '---I don't need the information for this table, but I want to use the table structure of this table, just use truncate

This article describes how Oracle uses odu to verify rman backup to process command instances for truncate object backup. If you need rman backup, you can refer to this article. By Digging data files before and after rman backup through odu, we know the rman backup process, and the raw data of the vast majority of truncate tables is not properly backed up (why is the vast majority, I cannot explain it). her

Note: The delete statement is a delete statement without the where clause.SimilaritiesTruncate, 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 will delete the constraints, triggers, and indexes that the table structure is dependent on. Stored Procedures/functions that depend on the table will be retained, but it changes

Truncate and delete have the following differences: 1. truncate is very fast on various tables, whether large or small. If the rollback command Delete is used, the truncate command is not used. 2. truncate is a DDL language. Like all other DDL languages, it will be implicitly submitted and cannot use the rollback com

This article provides a detailed analysis of the usage of the string truncate function in smarty. For more information, see Smarty truncate stringTruncates a certain length of characters starting from a string. the default length is 80. Specify the second parameter as the length of the truncated string By default, smarty captures the end of a word, If you need to specify the number of characters to intercep

Can rename table but can not truncate table, renametruncateA table cannot be truncate but can be rename. This sounds strange at first. The process is simulated below.Three sessions:Session1 performs the truncate and rename operations;Session2 performs the lock table operation;Session3 is monitored.Session1: [gpadmin@wx60 contrib]$ psql gtlionspsql (8.2.15)Type "h

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 will delete the constraints, triggers, and indexes that the table structure is dependent on. Stored Procedures/functions that depend on the table will be retained, but the status changes to invalid. 2. The delete statement is the database

How to Use the truncate () method to operate files in Python This article mainly introduces how to use the truncate () method to operate files in Python. It is the basic knowledge of getting started with Python. For more information, see The truncate () method truncates the file size. If an optional size parameter exists, the maximum size of the file is truncated

The similarities and differences between truncate, delete (without a WHERE clause) and drop:In the same:, the data in the table will be deleted by all three. Different points: In practical applications, the difference between the three is clear.When you no longer need the table, use drop;When you still want to keep the table, but to delete all records, use truncate;When you want to delete some records (alwa

Truncate and delete have the following differences: 1. truncate is very fast in various tables, whether large or small. If the rollback command Delete is used, the truncate command is not used. 2. truncate is a DDL language. Like all other DDL languages, it will be implicitly submitted and cannot use the rollback comma

Smarty Truncate intercept stringIntercepts a length of characters from the beginning of a string, with a default length of 80 Specifies the length of the second argument as the Intercept string By default, Smarty is truncated to the end of a word, If the exact number of characters to intercept can be used, use the third parameter to set it to "true" The specific usage is as follows: Copy CodeThe code is as follows: index.php $smarty = new Smarty; $sm

For some large tables, it is better to use truncate table to delete data than delete data. Truncate table (TRANSACT-SQL) Removes all rows from 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 fewe

Retrieve the Table that has been mistakenly dropped/Truncate/Delete on the primary database on the standby Database Prerequisites: - Standby Database Must be in Flashback database mode. - Time at which Drop/Truncate/Delete Table happened should be within the db_flashback_retention_target and all the flashback and archive logs should be available Retrieve the Table that has been mistakenly dropped/

TRUNCATE TABLEDeletes all rows in the table without logging a single row delete operation.GrammarTRUNCATE TABLE NameParametersNameis the name of the table to truncate or the table whose entire row you want to delete.CommentsTRUNCATE TABLE WHERE DELETE TRUNCATE TABLE DELETE The DELETE statement deletes one row at a time and records an entry in the transaction lo

Tags: truncate TABLEThe DELETE statement in SQL deletes one or more records from the table, and you can provide a WHERE clause to the DELETE statement, and any conditions that can be used in the SELECT statement in SQL can be used in the delect WHERE clause. The syntax format for the DELETE statement is:DELETE [from] {table_name|view_name} [WHERE condition].If you do not specify a WHERE clause for the DELETE statement, all records in the table are del

In smarty, truncate and spacify are used together to intercept the question template file index. the code in tpl is as follows: {code ...} index. the code in php is as follows: {code ...} the result of code execution is: SmokersarePr... but according to my thinking, the following section... question about truncate and spacify used in combination in smarty to intercept characters The code in index. tpl of th

Note: The delete statement is a delete statement without the WHERE clause.SimilaritiesTruncate, 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 will delete the constraints, triggers, and indexes that the table structure is dependent on. Stored Procedures/functions that depend on the table will be retained, but it changes

There are two ways to delete data in MySQL: one is the delete statement and the other is the truncate TABLE statement. You can use the WHERE clause to select the record to be deleted. However, using truncate table will delete all records in the table. Therefore, the delete statement is more flexible. To clear all records in the table, you can use the following two methods: Delete from Table1Truncate tab

Improved the truncate method in smarty to support Chinese characters, smartytruncate. Improved truncate in smarty to enable it to support Chinese characters. smartytruncate this article describes how to improve truncate in smarty to enable it to support Chinese characters. This article is for your reference. for example, smarty's method of improving

the DELETE command is used to remove the tables data either selective or all and put the data in an rollback segment as well where from a read consistent view or a flashback view can be seen even after commit and one can rollback the tables data after Delete as well. after refreshing a delete operation you need to commit or rollback the transaction to make the C Hange permanent or to undo it. one more thing Delete doesn' resets the hwm and space occupied with insert can't be reclaim by Delete.