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If you are using a SQL Server database! You don't want to operate in the background, you can look at this. The following is the operation of the text you can look at 1. Write Operations (WRITETEXT) The functions commonly used here are textptr to

Rich data types Richer-Types 1, varchar (max), nvarchar (max), and varbinary (max) data types can hold up to 2GB of data and can replace text, ntext, or image data types. CREATE TABLE myTable(id INT,content VARCHAR(MAX)) 2. XML data type XML data

Server Q: Suppose I now have 2 SQL Server (Windows Server 2003 + SQL Server SP3), named DB01 and DB02, trusting each other, adding each other to the list of linked servers, without any problems with regular access, but Unable to enable distributed

Many database operations on the web require transactions, and there are roughly 3 levels of transactions under ASP.net: (1) Transaction at the level of the stored procedure (2) Ado.net-level transactions (3) asp.net transaction at the page

Description of a SQL Server lock typeWhen locking in a SQL Server database, in addition to the different resources can be locked, you can also use different degrees of lock-up mode, there are multiple modes, the lock mode in SQL Server includes:1.

The origin of 11.4.1 affairs When you update a database with the delete command or the update command, you can only manipulate one table at a time, which can cause data inconsistencies in the database. For example: The enterprise cancels the

------------------ The reasons for the slow query are many, and the following are common: 1, no index or no index (this is the most common problem of slow query, is the defect of program design)The 2,i/o throughput is small, creating a

Transferred from: http://www.cnblogs.com/hoojo/archive/2011/07/19/2110325.htmlØ 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

The reasons for the slow query are many, and the following are common:1, no index or no index (this is the most common problem of slow query, is the defect of program design)2, I/O throughput is small, forming a bottleneck effect.3. No computed

SQL server2005 optimization Query Speed 50 Summary of methods SQL server2005 Optimization Query speed 51 method Query Slow reason many, common following several, we can refer to below.I/O throughput is small, creating a bottleneck effect.A computed

Although the query speed is a lot of reasons, but if through a certain optimization, you can also make the query problem to a certain extent to be resolved.The reasons for the slow query are many, and the following are common: No index or

1. Deadlock PrincipleAccording to the definition in the operating system: A deadlock is a permanent wait state in which each process in a set of processes occupies a resource that is not freed, but is placed in a form that is not freed by other

The new content about the database. The reasons for the slow query are many, and the following are common:1, no index or no index (this is the most common problem of slow query, is the defect of program design)2, I/O throughput is small, forming a

ObjectiveNext we end up with the last few sections of the SQL Server Basic series, and then we'll talk about SQL Server performance tuning, and we'll get to the topic.SQL Server transactions affect local variablesWhat does a transaction have to do

Create the following stored procedure in the master database--Handle Deadlocks--View the current process, or deadlock process, and automatically kill the dead process--because it's dead, you can only view the deadlock process if there is a deadlock

The reasons for the slow query are many, and the following are common:1, no index or no index (this is the most common problem of slow query, is the defect of program design)2, I/O throughput is small, forming a bottleneck effect.3. No computed

Original: SQL Server submitted read snapshot test1. Open the database submitted read snapshot option2. The database has been submitted to read the test in snapshot modeA) test table testsb) Turn on transaction 1, update data C2 = ' 200 ' (not

A: What happens when select encounters a performance-poor update?1. Use the original person table, insert 6 data, because it is 4000 bytes, so two data is a data page, such as:1 DROP TABLE dbo. Person2 CREATE TABLE person (ID INT identity,name CHAR (

1, no index or no index (this is the most common problem of slow query, is the defect of program design)2, I/O throughput is small, forming a bottleneck effect.3. No computed columns are created, resulting in queries not being optimized.4.

MS SQL Server Query optimization methodThe reasons for the slow query are many, the following are common1, no index or no index (this is the most common problem of slow query, is the defect of program design)2, I/O throughput is small, forming a