问题描述
如何在 SQL Server 会话中设置自动提交?
How do you set autocommit in an SQL Server session?
推荐答案
你可以通过设置implicit_transactions OFF来开启自动提交:
You can turn autocommit ON by setting implicit_transactions OFF:
SET IMPLICIT_TRANSACTIONS OFF
当设置为 ON 时，它返回到隐式事务模式.在隐式事务模式下，您所做的每一次更改都会启动一个您必须手动提交的事务.
When the setting is ON, it returns to implicit transaction mode. In implicit transaction mode, every change you make starts a transactions which you have to commit manually.
也许举个例子更清楚.这会将更改写入数据库:
Maybe an example is clearer. This will write a change to the database:
SET IMPLICIT_TRANSACTIONS ON
UPDATE MyTable SET MyField = 1 WHERE MyId = 1
COMMIT TRANSACTION
这不会将更改写入数据库:
This will not write a change to the database:
SET IMPLICIT_TRANSACTIONS ON
UPDATE MyTable SET MyField = 1 WHERE MyId = 1
ROLLBACK TRANSACTION
以下示例将更新一行，然后抱怨没有要提交的事务:
The following example will update a row, and then complain that there's no transaction to commit:
SET IMPLICIT_TRANSACTIONS OFF
UPDATE MyTable SET MyField = 1 WHERE MyId = 1
ROLLBACK TRANSACTION
就像 Mitch Wheat 所说的，自动提交是 Sql Server 2000 及更高版本的默认设置.
Like Mitch Wheat said, autocommit is the default for Sql Server 2000 and up.
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