Protect backend from multiple form submits in Laravel I'm trying to protect my backend from multiple post requests to avoid duplicate data on the database and the server overload. I've already blocked the frontend disabling the submit button after a firs... ...
通过这样做,我找到了自己的方法: \DB::beginTransaction();try { \DB::table('table_name')->where('id', $data[0]['id'])->delete(); // delete it first to avoid id duplicate when inserting, comment this if id is auto increment $status = \DB::table('table_name')->insert($data[0...
All rows in Oracle have a rowid. This is a physical locator. That is, it states where on disk Oracle stores the row. This unique to each row. So you can use this value to identify and remove copies. To do this, replace min() with min(rowid) in the uncorrelated delete: Copy code ...
You can duplicate, edit, or delete user-defined measures using the Manage Planning Measures task, which is available in the Tasks drawer.
将不起作用,因为如果该字段已经存在,它将简单地忽略它并且不插入任何内容。将不起作用,因为如果字段已经存在,它将首先对其执行DELETE操作,然后再次对其执行INSERT操作,而不是更新它。将会起作用,但不能批量使用。 所以我想知道是否有像INSERT ...ON DUPLICATE KEY UPDATE这样的命令可以批量</e...
insert时如果数据出现duplicate key,会加LOCK_S锁,类型为NEXT-KEY LOCK,此时事务2已经在申请record lock X锁,在申请队列中了,事务1再加NEXT-KEY LOCK S锁则需要等待事务2提交,这就造成了相互等待。加锁分析T2 delete语句需要等待记录上的X锁; 普通insert时,其加锁过程为先在插入间隙上获取插入意向锁,插入数据...
[ASC | DESC], ...]12[HAVING where_definition]13[ORDER BY {unsigned_integer | col_name | formula} [ASC | DESC],...]14[LIMIT [offset,]rows|rows OFFSET offset]15[PROCEDURE procedure_name(argument_list)]16[FOR UPDATE | LOCK IN SHARE MODE]]1718SELECT用于检索从一个或多个表中选取出的...
CDC for Oracle results in transaction log growth Error message when you run the Distribution Agent Fail to enumerate subscription properties Install service packs and hotfixes Manually remove replication Monitor transaction log growth with CDC Non-convergence when SQL Server processes child generat...
Re: How to delete Duplicate rows having the value ojiwa janga April 15, 2009 06:45AM Sorry, you can't reply to this topic. It has been closed.Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not ...
VBScript to combine rs values, loop and add to duplicate(s) I've written a lot of IF statements in VBScript, but haven't gone much beyond that so apologize for my lack of experience. I hope what I'm asking is simple to do. I want to output item identifiers cre......