commit tran

Here are a few of my statistical options: first Scenario (recursive): The simple table structure is: CategoryID Int (4), CategoryName nvarchar (50), ParentID Int (4), Depth Int (4) In this way, according to the parentid level of the use of

The definition of a thing:The object of the database is atomic, and the concept of atomicity refers to something as a unit.From a database point of view, it is the smallest combination of one or more statements that are executed or not executed at

Directory:Interpreting error messagesRAISERRORTHROWInstanceUse @ @ERRORUsing Xact_abortUsing Try/catchTransactional statements in real-worldDeleteUpdateBank to withdraw moneyInterpreting error messagesMSG 547, Level A, state 0, line 11The INSERT

Transactions and locks in the database ACID properties of a transaction 1,A (atomicity) atomicity The transaction must be an atomic unit of work, or all of its data modifications, or none of them executed. 2,C (consistency) Consistency When a

The example in this article describes the method of writing transactions in SQL Server stored procedures. Share to everyone for your reference, specific as follows: database transactions in SQL Server are quite useful, and since many SQL beginners

Strictly speaking, these three production methods have certain intersections, and their positioning methods will be explained below Strictly speaking, these three production methods have certain intersections, and their positioning methods will be

Advantage: there are few fields and the addition, deletion, modification, and query functions are available. However, the query is too general. Disadvantages: 1. The classpath field defines the limit. 2. The primary key classid is not

1. Regarding the concurrency issue, that is, if I am browsing, and another user is modifying. An error occurs.SET transaction read onlySelect * from MERs where name = 'tree ';Commit;2. p227 transactions and rollback.Same life and death ..The

Copy codeThe Code is as follows: -- add a table Field ALTER procedure [dbo]. [sp_Web_TableFiled_Insert] ( @ TableName varchar (100 ), @ FieldName varchar (100 ), FieldExplain varchar (200 ), @ DataType varchar (100 ), @ ConnectTableName varchar (100

This series of articles I saw in the sqlskill.com's PAUL blog, many misunderstandings are more typical and representative, the original from the T-SQL Tuesday #11: Misconceptions about... EVERYTHING !!, After translation and arrangement by our team,

ASP tutorials. NET and SQL processing1: Write directly to SQLWrite SQL statements directly, the SQL statement itself can have transactions, have transactions, in the stored procedure using the BEGIN TRAN,COMMIT Tran rollback TRAN. Advantages:

Primary keys are generated in three main ways: A. Automatic database generation Two. GUID Three. Development and Creation Strictly speaking, these three kinds of production methods have a certain intersection point, its positioning mode will be

Copy Code code as follows: --New table field ALTER procedure [dbo]. [Sp_web_tablefiled_insert] ( @TableName varchar (100), @FieldName varchar (100), @FieldExplain varchar (200), @DataType varchar (100), @ConnectTableName varchar (100),

Isolation level for SQL Server transactionsDatabase is to be shared by the vast number of customers to access, then in the database operation process is likely to occur in the following kinds of uncertainty.Update missing (Lost update)Two

Transferred from: http://blog.csdn.net/eseaqyq/article/details/7795023————————————————————————————————————————————————————Speaking of the deadlock in the data, has been repeatedly encountered in the written questions. Today is a summary of the

Understanding Transactions and LocksTransactions: The essential tool for maintaining logical data consistency and recoverability.Lock: When multiple users access the same database resource, a mechanism for the priority authority management of access,

It is recommended that you read the stored procedure first: SQL Server stored ProcedureØ BusinessIn a database, it is sometimes necessary to run instructions from multiple steps as a whole that either succeeds or fails altogether, which requires a

For more information about how to add, modify, delete, and describe fields, see. For more information about how to add, modify, delete, and describe fields, see. The Code is as follows: -- New table Field ALTER procedure [dbo].

Today, I suddenly noticed this problem. I have read a lot from the Internet and have benefited a lot. Record it and review it later ~ I have encountered this problem in my work before. Two users operate on one record at the same time. User A queries

Summary of several methods for implementing transactions in. Net:1. transactions are implemented using SQL statements in the background database, and the transfer service is implemented on the Database End using statements, as shown below: Set