truncate in teradata

Label:a), First of all, let's say the error phenomenon: Most of the popular Ecshop templates on the market need to execute a paragraph or a few SQL statements to modify the data structure or initialize some of it. Most Ecshop administrators will execute these SQL statements through the Ecshop backend database management SQL query for the sake of convenience. The problem is that when you paste into the SQL statement and click "Submit Query", the system will report the following error: This SQL ma

1.1 Backing up the database ThunderMysqldump-s/tmp/mysql3316.sock--single-transaction--master-data=2 Thunder >thunder_full_2015112.sql1.2 Perform a TRUNCATE TABLE operation and insert into table(work) [Emailprotected]:mysql3316.sock[(none)]>select*fromthunder.tb1;+----+-------- -+|id|name|+----+---------+|1|test | | 4|thun| | 5|thunder| | 6|thun| | 7|thun| | 8|thun| | 9|test|+----+---------+7rowsinset (0.00 NBSP;SEC) (work) [emailprotected]:mysql3316.

Usage: deletefromtablename; truncatetabletablename; similarities: delete and truncate can clear table data. Differences: delete statements are used for tables and views. delete can delete a single piece of data; delete is a DML language. truncate can be used only for tables. truncate can be used to delete the entire table. Usage: delete from tablename;

The similarities between the three commands: truncate and delete without the where clause, and drop will delete the data in the table. The difference is that truncate will clear the table data table and set the id to start from 1, delete: only records are deleted. drop can be used to delete tables or databases and release all the space occupied by tables. The similarities between the three commands:

The truncate table name and the delete table name without the WHERE clause have the same function. All rows in the table are deleted, but the truncate table is faster than the delete table, and the truncate table uses less system and transaction log resources. Each row deleted by the delete statement records one row in the transaction log. The

1, truncate and delete only delete data without deleting the structure of the table (definition), while the drop statement will delete the structure of the table is dependent on the constraint (constrain), trigger (trigger), indexed (index); Stored procedures/functions that depend on the table are preserved, but become invalid states.2, the DELETE statement is DML, this operation will be put into rollback segement, after the transaction is committed,

The actual line of the scene is more complex, then involved in the TRUNCATE, delete two operations, confirmed lost data almost 70,000 lines, and so on stop, almost a total of more than 10,000 rows of data written. Here for a simple explanation, just get a simple example of a business scenario. Test environment: percona-server-5.6.16Log format: Mixed didn't employ gtid. The table structure is as follows: CREATE TABLE ' tb_wubx ' ( ' id ' int

follows: ROUND (3.45,1) retains 1 bits after the decimal point, rounding the result of 3.5;round (3.45,0) retains 0 digits after the decimal point, that is, returning the rounded integer value, ROUND (123.45,-1) retains 1 digits to the left of the decimal point, which is 1 bits to the left of the decimal point, The 1 bits are replaced with 0, and the return value is 120;round (167.8,-2), leaving 2 digits to the left of the decimal point, which is 2 bits to the left of the decimal point, two i

Tags: blog http using ar strong data SP on logOriginal address: http://www.cnblogs.com/simplefrog/archive/2012/07/30/2615169.htmlGrammarDelete from AATRUNCATE TABLE AAdifference1.delete from the back can write the condition, truncate not.2.delete from records are deleted, each row of records will go into the log, and truncate delete the entire page at once, so the day to the inside only record page release,

Label:GrammarDelete from AATRUNCATE TABLE AA difference1.delete from the back can write the condition, truncate not. 2.delete from records are deleted, each row of records will go into the log, and truncate delete the entire page at once, so the day to the inside only record page release, in short, delete from the update log, truncate basic No, the use of less tr

GrammarDelete from AATRUNCATE TABLE AADifference1.delete from the back can write the condition, truncate not.2.delete from records are deleted, each row of records will go into the log, and truncate delete the entire page at once, so the day to the inside only record page release, in short, delete from the update log, truncate basic No, the use of less transactio

Original: The difference between delete and truncateIn general, data that is not used is deleted by row, and deletion is usually done with the delete and TRUNCATE commands. For conditionally deleted, basically will use delete, of course, there is no absolute, with TRUNCATE can also be implemented, as long as the "do not need to" delete the data into the new table, and then

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

What's the difference between delete and truncate? The way to delete data in a table is Delete,truncate, They all delete the data in the table, not the table structure, delete the data from the entire table or delete the data from one or N of the table that satisfies the condition, and truncate can only delete the data from the entire table. And the

While it's not recommended to use commands to delete things in a database table, these delete commands are always useful.When it comes to deleting table data, the biggest thing you can remember is the delete.However, we do database development and read database data. It's less for the other two brothers.Now to introduce the other two brothers, is to delete the table data, in fact, it is very easy to understandBoss------DropScenario: Drop table TB--TB represents the name of the data tableTrick: d

The truncate () method truncates the size of the file. If an optional dimension parameter exists, the file is truncated (up to) the size. The size defaults to the current position. The current file location does not change. Note that if a specified size exceeds the current size of the file, the results are dependent on the platform. Note: This method does not open in read-only mode when the file is working.Grammar The following is the syntax for the

PRM? DULfororacle restores the table truncated by truncate OracleDBA: PRM disaster recovery tool and Schema-level data recovery. PRMForOracleDatabase-schema-level oracle database data recovery features, PRM is ParnassusDataRecoveryManager is an enterprise-level Oracle Database disaster recovery tool. PRM can PRM? DUL for oracle recover the table truncated by truncate Oracle DBA: PRM disaster recovery tool,

; Select Segment_name, Segment_type, bytes2 from User_segments;Segment_name Segment_type BYTES--------------------------------------------------------------------------------- ------------------ ----------sys_il0000085497c00001$$ Lobindex 65536sys_lob0000085497c00001$$ lobsegment 40894464TTABLE 327680------TRUNCATE TABLEsql> truncate TABLE t;Table truncated.Sql> Select Segment_name, Segment_type, bytes2 fro

Oracle Update Data Tip Custom "ORA-20010: Cannot drop/truncate the table" errorJava.sql.batchupdateexception:ora-00604:error occurred at recursive SQL Level 2ORA-20010: The table cannot be drop/truncate.Ora-06512:at Line 12Org.springframework.jdbc.UncategorizedSQLException:Hibernate operation:could not execute JDBC batch update; Uncategorized SQLException for SQL [update bidlink_bid_info set doc_content=?, doc_htmlcon=?, doc_author=?, Doc_abstract =?,

SQL Server's TRUNCATE transaction rollback operation method, servertruncate We generally think that TRUNCATE is an operation that cannot be rolled back. It will delete all data in the table and reset the Identity column. If you perform the TRUNCATE operation in the transaction, you can roll back. Otherwise, it will not recover data from the log file. It does not