truncate in teradata

Tags: ms_sql sever 2008Same point:Truncate and delete without a WHERE clause, and drop deletes the data in the tableDifferent 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 (indexed); Stored procedures/functions that depend on the table are preserved, but become inva

Detailed usage of the truncate of smarty ..... Ask: What is the usage of smarty's truncate? Why is the difference between the length of the captured characters and the actual captured characters so far ?? Template code: {$ title | truncate: 15} lt; br gt; PHP handler code: $ smarty- gt; assign ( quot; detailed usage of title quot;, quot; whatw smarty's

TRUNCATE TABLEDeletes all rows in the table without logging a single row delete operation.GrammarTRUNCATE TABLEnameParametersNameis the name of the table to truncate or the table whose entire row you want to delete.CommentsTRUNCATE table is functionally the same as a DELETE statement without a WHERE clause: Both delete all rows in the table. However, TRUNCATE TAB

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

Detailed usage of the truncate of smarty ..... Ask: What is the usage of smarty's truncate? Why is the difference between the length of the captured characters and the actual captured characters so far ?? Template code: {$ title | truncate: 15} lt; br/ gt; PHP handler code: $ smarty-truncate detailed usage ..... Ask:

Oracle 12C TRUNCATE TABLE CASCADE The truncate table cascade statement is provided in Oracle 12c to delete the association when the TABLE has a primary foreign key relationship and is cleared. The following is a demonstration. 1. Prepare the test tableSQL> CREATE TABLE t1 (2 id NUMBER,3 description VARCHAR2 (50 ),4 CONSTRAINT t1_pk primary key (id)) 5; Table created. SQL> CREATE TABLE t2 (2 id NUMBER,3 t1_i

After the Rman backup and after the backup of the data files, learned that the process of Rman backup ODU, the majority of TRUNCATE TABLE raw data is not properly backed up (why the vast majority, I can not explain), here you can see the Rman Backup is not really completely physically replicated (and Rman copy is still different, copy cannot be completely superseded) Creating a simulated environment The code is as follows Copy Code

Truncate DELETE, drop statement difference Different points:1. Truncate and delete Delete 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); Stored procedures/functions that depend on the table are preserved, but become invalid states.The 2.delete statement is DML, which

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To remove all rows from a table, the TRUNCATE table statement is a quick and efficient method. TRUNCATE TABLE is similar to a DELETE statement that does not contain a WHERE clause. However, TRUNCATE TABLE is faster and uses fewer system resources and transaction log resources.TRUNCATE TABLE has the following advantages over the DELETE statement: Less transa

Label:In previous versions, the parent table could not be truncate directly when there was a foreign key constraint. In 12C, a cascade operation attribute was added to the truncate operation. If you create a FOREIGN key constraint, use "on Delete Casacde". Test script: Sql>drop table child; SQL>drop table parent; SQL>CREATE TABLE parent (ID number primary key); SQL>CREATE TABLE Child (CID number primary ke

An error is returned when a table structure is deleted. It may be the cause of the table lock. After the truncate command is used, done! Delete all rows in the table without recording the delete operation of a single row. Syntax Truncate tableName Parameters Name Is the name of the table to be truncated or the name of the table to delete all its rows. Note The tr