一、 相同点 不带条件的delete与truncate均可删除表中所有数据 delete与truncate均可回滚,这是跟oracle很不一样的地方,oracle的truncate不能回滚,pg可以 均不更改表结构、索引、约束等 均不会缩小数据文件大小,若要缩小需使用 DBCC SHRINKFILE (N'Testdb' , 40000) 二、 不同点 参考 https://docs.microsoft.co...
Difference 2: Triggers When we run the DELETE command, the SQL Server invokes the DELETE triggers. I have created a trigger namedtrgdeleteStudentontblStudent. When we execute a DELETE statement on thetblstudenttable, the trigger inserts a record in atblDeletedStudenttable. The T-SQL code to...
difference between Truncate and Delete 一、delete产生rollback,如果删除大数据量的表速度会很慢,同时会占用很多的rollback segments .truncate 是DDL操作,不产生rollback,速度快一些. Truncate table does not generate rollback information and redo records so it is much faster than delete. In default, it dea...
想保留表而将所有数据删除. 如果和事务无关,用truncate即可. 如果和事务有关,或者想触发trigger,还是用delete. 如果是整理表内部的碎片,可以用truncate跟上reuse stroage,再重新导入/插入数据 The difference in TRUNCATE and DELETE in Sql Server I’ve answered this question many times, and answered it again ...
[Forum FAQ] How to fix the Error “The column XX cannot be processed because more than one code page (65001 and 1252) are specified for it” in SSIS? [Microsoft][ODBC SQL Server Driver][DBNETLIB] General Network error. Check your network documentation [OLE DB Destination [16]] Error: ...
Control'." While assigning stackpannel childrens(Controls) in to the Control i am getting this error (C# WPF)How could I hide a control (ex. a textbox) and display it again (Element Name) is not supported in a windows presentation foundation (WPF) project. (MVVM) - How To Bind to ...
A DIFFERENCE BETWEEN DELETE AND TRUNCATE IN SQL Distributed Optimistic Concurrency Control Methods for HighPerformance Transaction Processing - Thomasian - 1998 () Citation Context ...reSQL, Oracle and SQL... B Patel,J Trivedi - IJARIIE 被引量: 0发表: 2018年 PostgreSQL 8.3 Cheat sheet in PDF...
just like when aDELETEstatement is executed, the transaction log stores the information that is required to recover the transaction; the difference is that the transaction log doesn’t store information on each individual row that has been truncated and thus doesn’t support point-in-time recovery...
SQL Copy As you can see below, we got the records back. So we can rollback DELETE as well TRUNCATE if the commands are started inside a transaction and there is no difference between DELETE and TRUNCATE if we are talking about rollback. Try it on your own and let me know if you exp...
2.delete语句是DML语言,这个操作会放在rollback segement中,事物提交后才生效;如果有相应的触发器(trigger),执行的时候将被触发。truncate、drop是DDL语言,操作后即生效,原数据不会放到rollback中,不能回滚,操作不会触发trigger。 3.delete语句不影响表所占用的 SQL Server 触发器 DELETE 语句。DML 触发器可以...