isolation-level

How do I override the default isolation level when using the Transaction attribute in Spring.Net

When using the Transaction() attribute on a method the default isolation level is ReadCommitted.What I want to do is set the default isolation level to ReadUncommitted in the Spring.NET config ( so as[详细]

2023-04-12 12:12 分类：问答

Scenario where one should use Read committed or Serializable as Isolation level?

I am trying to figure out which isolation level (among serializable and read committed )is betterin what scenarios..At link http://download.oracle.com/docs/cd/B14117_01/server.101/b10743/consist.htm#i[详细]

2023-04-12 08:16 分类：问答

How to block inserts in SQL Server from the same user only - serializable isolation

I have the following table CREATE TABLE [dbo].[Test]([Id] [int] NOT NULL,[Name] [varchar](50) NOT NULL,[详细]

2023-04-08 02:17 分类：问答

Transactions, locks, isolation levels

I have a few questions regarding subject from the title. First of all, lets assume that we work with JDBC, and there we have 2 transactions T1 and T2. In T1 we execute select statement on one particul[详细]

2023-04-05 09:17 分类：问答

Some clarifications on different Isolation level in database transaction?

Below is the statement written from Wikipedia\'s Isolation article about REPEATABLE READS In this isolation level, a lock-based concurrency control DBMS implementation keeps read and write locks (ac[详细]

2023-04-05 02:29 分类：问答

Reading uncommitted changes (dirty read) from SQLite database

I wrote an application (using Qt in C++) which inserts data into a SQLite database. Another application reads data from the same database, but I noticed that it is not possible to read uncommitted dat[详细]

2023-04-04 10:55 分类：问答

How to set transaction isolation level in terms of performance and flexibility

I want to set transaction isolation level befo开发者_如何学编程re each sql statement in my framework. But I wonder if there is a performance penalty in doing this?[详细]

2023-04-02 07:14 分类：问答

Can I change isolation level in Oracle?

I\'m writting a transaction in Oracle. Can I change isolation level within t开发者_StackOverflow中文版his transaction for one select statement?[详细]

2023-03-29 11:19 分类：问答

InnoDB SELECT ... FOR UPDATE statement locking all rows in a table

MySQL Server version 5.1.41 with InnoDB plugin enabled. I have the following three tables for invoices: invoices, invoice_components and invoice_expenses. Table invoices has invoice_id primary key. Bo[详细]

2023-03-20 01:15 分类：问答

READ UNCOMMITTED and Estimates

From time to time, I want to run a stored procedure to get a rough estimate of how many records in two or three different tables satisfy some criteria. If during this estimate new records ar开发者_如何[详细]

2023-03-14 06:29 分类：问答