blocks|key|578804|text|你要么回滚一个事务，要么提交一个事务，我希望你没有把它与BEGIN和END块混淆，后者既不是事务，也不是事务。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|578805|我相信大多数数据库...不过，它仍然以回滚或提交结束。|578806|希望这能有所帮助。|578807|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Either you ROLLBACK a Transaction Or COMMIT a Transaction.I hope you are not confusing it with BEGIN and END block which is not a transaction and nothing to do with Transaction at All.

I believe in most databases .... still it ends with a ROLL BACK or COMMIT. 

Hope this helps.

blocks|key|1631073|text|BEGIN/END对代码块进行定界，而不控制事务。如果不在事务中，则每个语句将在一个自主事务中执行。通常，BEGIN/END与分支/循环指令(IF/WHILE)一起使用。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1631074|BEGIN+TRANSACTION+/+COMMIT+TRANSACTION表示事务的开始:此块中的每个语句都在同一事务中执行，不能单独提交或回滚。|1631075|entityMap^0|0|9|1H|9|1Z|8|0|0|12|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|I|$]]

<code>BEGIN/END</code> delimits a block of code, without controlling a transaction. If not already inside a transaction, each statement will execute in an autonomous transaction. Typically <code>BEGIN/END</code> is used with branching/looping instructions (<code>IF/WHILE</code>).

<code>BEGIN TRANSACTION / COMMIT TRANSACTION</code> denotes the beginning of a transaction: each statement inside this block is executed in the same transaction and cannot be committed or rolled back individually.

blocks|key|1630996|text|对于来自程序内部的SQL事务，END语句只需关闭事务即可。这意味着事务已经完成，不应该再发生任何事情。COMMIT语句实际上告诉数据库您希望事务更改是永久的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1630997|如果处于“自动提交”模式，则不需要COMMIT语句，因为每个查询/语句都应该提交。|1630998|有关提交的更多信息，请访问here。|offset|length|1630999|如果您正在使用ODBC进行数据库连接，则可以在here中找到有关事务管理的信息。|1631000|另外，这个question之前也被问过。|1631001|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/aa258243(v=sql.80).aspx)|1|http://msdn.microsoft.com/en-us/library/ms131281.aspx|2|https://stackoverflow.com/questions/2730341/sql-server-begin-end-vs-begin-trans-commit-rollback^0|0|0|D|4|0|0|N|4|1|0|5|8|2|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Z|8|@]|9|@$F|10|G|11|1|12]]|A|$]]|$1|H|3|I|5|6|7|13|8|@]|9|@$F|14|G|15|1|16]]|A|$]]|$1|J|3|K|5|6|7|17|8|@]|9|@$F|18|G|19|1|1A]]|A|$]]|$1|L|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S]]|T|$5|O|P|Q|A|$R|U]]|V|$5|O|P|Q|A|$R|W]]]]

For SQL transactions coming from inside a program like that, an END statement simply closes the transaction. Meaning that the transaction is finished and nothing more should be taking place. The COMMIT statement actually tells the database that you want the transaction changes to be PERMANENT. 

If you are in "autocommit" mode, the COMMIT statement is not needed as every query/statement should be committed.

More information about COMMIT can be found <a href="http://msdn.microsoft.com/en-us/library/aa258243(v=sql.80).aspx" rel="nofollow noreferrer">here</a>.

If you are using ODBC for your database connection, information on transaction management can be found <a href="http://msdn.microsoft.com/en-us/library/ms131281.aspx" rel="nofollow noreferrer">here</a>.

Also this <a href="https://stackoverflow.com/questions/2730341/sql-server-begin-end-vs-begin-trans-commit-rollback">question</a> has been asked before.

blocks|key|4979827|text|'+end‘用于结束过程/函数。语句的执行是很重要的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4979828|“‘Commit”用于永久保存事务中的所有更改。|4979829|例如，您使用SQL语句创建或删除了一个表，则需要提交更改。|4979830|在这里阅读有关Commit语句的更多信息。|4979831|http://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_4010.htm|offset|length|4979832|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|0|21|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|V|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|W|8|@]|9|@$J|X|K|Y|1|Z]]|A|$]]|$1|L|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|I]]]]

'End' is used to end the procedure/function. It is important for the statement to be executed. 
'Commit' is being used to permanently save all changes in the transaction. 
For example, you have created or deleted a table using SQL Statement, you will need to commit the changes. 
 
Read here more about the Commit Statement. 
<a href="http://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_4010.htm" rel="nofollow">http://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_4010.htm</a>

blocks|key|4979988|text|开始和结束事务的确切命令名取决于您使用的特定数据库(遗憾的是)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4979989|例如：|4979990|在SQLite中，使用begin+/+BEGIN+transaction开始，使用END+/+END+TRANSACTION+/+COMMIT+/+COMMIT+TRANSACTION结束事务。|offset|length|4979991|在MySQL中，可以使用START+TRANSACTION+/+BEGIN+/+BEGIN+WORK和COMMIT+/+COMMIT+WORK。|4979992|entityMap|0|LINK|mutability|MUTABLE|url|http://sqlite.org/lang_transaction.html|1|http://dev.mysql.com/doc/refman/5.0/en/commit.html^0|0|0|1|6|0|0|1|5|1|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@$F|W|G|X|1|Y]]|A|$]]|$1|H|3|I|5|6|7|Z|8|@]|9|@$F|10|G|11|1|12]]|A|$]]|$1|J|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q]]|R|$5|M|N|O|A|$P|S]]]]

The exact command names to begin and end a transaction depend on the specific database you use (unfortunately). 

For example: 

In <a href="http://sqlite.org/lang_transaction.html" rel="nofollow">SQLite</a>, you use BEGIN / BEGIN TRANSACTION to begin, and END / END TRANSACTION / COMMIT / COMMIT TRANSACTION to end a transaction. 

In <a href="http://dev.mysql.com/doc/refman/5.0/en/commit.html" rel="nofollow">MySQL</a>, you use START TRANSACTION / BEGIN / BEGIN WORK and COMMIT / COMMIT WORK for the same.

blocks|key|1631026|text|有关详细信息，请参阅此LINK|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1631027|1631028|报价:开始事务处理和结束事务处理事务处理。它们不指定新的代码块；它们只标记事务边界。|blockquote|1631029|1631030|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/2730341/sql-server-begin-end-vs-begin-trans-commit-rollback^0|B|4|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]|$1|E|3|F|5|G|7|V|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|W|8|@]|9|@]|C|$]]|$1|I|3|-4|5|6|7|X|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Please refer to this <a href="https://stackoverflow.com/questions/2730341/sql-server-begin-end-vs-begin-trans-commit-rollback">LINK</a> for details

<blockquote>
 QUOTE: 
 BEGIN TRANS and END TRANS begin and end a transaction. They DO NOT specify a new block of code; they only mark the transaction boundaries.
</blockquote>

I am trying to simulate a database recovery subsystem using java. However, I have the following questions.

Whenever begin transaction is issued, is it always necessary that there should be an end transaction? (Like the below example)

<pre><code>b1 --- Begin txn 1
r1(X) --- Read item X using txn 1
e1 --- End txn 1
</code></pre>

As per the above example, I am not issuing a Commit transaction statement. So, will my transaction succeed or fail? If the above example, is as below,

<pre><code>b1 --- Begin txn 1
r1(X) --- Read item X using txn 1
c1 --- commit txn 1
</code></pre>

what is the difference between end and commit?

Please let me know if you need more information.

Difference between END transaction and COMMIT transaction

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在尝试使用java来模拟一个数据库恢复子系统。然而，我有以下问题。无论何时发出begin transaction，是否总是需要有一个end transaction？(如下例所示)b1    --- Begin txn 1r1(X) --- Read item X using txn 1e1    --- End txn 1根据上面的示例，我不会发出Commit transaction语句。那么

问END transaction和COMMIT transaction之间的区别
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