in sql

In the development of database application project, some binary image data are often used, and the data of storing and reading the display image mainly adopts path link method and memory flow method. The path link method is to save the image file in

In this article I would like to summarize the following SQL Server 2014 introduces a variety of amazing performance improvements!!Cache Pool Extension (buffer pools Extensions)The idea of a cache pool extension is simple: Store page files on very

If you set a column to identity when you create a new table, you can not display the specified value when inserting the data, and SQL Server automatically populates the value of that column.Create Table TblPerson1 ( IntIdentity(1,1Primarykey not

T-SQL query advanced-understanding the lock introduction in SQL Server, each query will find the shortest path to achieve their goals. If the database only accepts one connection, only one query is executed at a time. Therefore, queries must be

Let's take an example. Create a new class in. NET, create a new method in this class, and then call this method in SQL Server. According to Microsoft, SQL Server 2.0 significantly enhanced the database programming model through the host Microsoft.

In today's article I want to talk about the more advanced, lightweight synchronization objects that SQL Server uses: Latches (Latch). The latch is a lightweight synchronization object used by the SQL Server storage engine to protect multithreaded

introduce Let's do an example, create a new class in. NET, create a new method in this class, and then call this method in SQL Server. According to Microsoft, SQL Server 2005 significantly enhances the database programming model by hosting the

sql| Difference |varchar| field type What is the difference between nvarchar and varchar in SQL Server 2000? SQL Server provides two types of data to store character information. The two data types are roughly the same in how they are used in SQL

My Russian name is "do not toss uncomfortable", so, do not put the partition table A good toss, I am not comfortable.In the previous section, we discussed how to create a partitioned table directly and how to convert a normal table into a

When we use SQL statements to process data, we may encounter some need to iterate over a table and act on it (add, modify, delete), and we need to use the for or foreach that we often use in programming, but writing loops in SQL often seems so

As a DBA, troubleshooting SQL Server is one of our responsibilities, and a lot of people each month bring us a variety of performance issues that can't be explained but solved.I've heard many times that the performance problems of previous SQL

In SQL Server, each query will find the shortest path to achieve its own goal. If the database accepts only one connection at a time, only one query is executed. Then the query is, of course, M.F.B. s to complete the work. For most databases,

Text: A summary of the knowledge about collation and character set in SQL Server and MySQLCharacter sets && sorting rulesA character set is a collection of character encodings for different languages, such as the UTF-8 character set, the GBK

Transfer from: http://www.cnblogs.com/CareySon/archive/2011/12/22/2297568.html introductionIn SQL Server, an index is an enhanced presence, which means that even without an index, SQL Server can still implement its due functionality. However,

Replace variables and definition variables in SQL * Plus, and sqlplus Replace variable Replace variables in SQL * Plus are also called substitution variables. They are generally used to temporarily store relevant data and pass values between SQL

Correct use and space occupation of NULL in SQL Server, servernull We often encounter NULL in the use or maintenance of SQL Server. What is NULL? The following is a brief description provided by MSDN (see "Null Values "): A value of NULL

Let's take an example. Create a new class in. net, create a new method in this class, and then call this method in SQL Server. According to Microsoft, SQL Server 2.0 significantly enhanced the database programming model through the host Microsoft.

server| Resolution | How the problem resolves connection problems in SQL Server 2000 apply to important notes: This article contains information about modifying the registry. Be sure to back up the registry before you modify the registry, and be

Turn from: 19498327 How do I capture and record deadlocks that occur in SQL Server?How SQL Server makes the error log record deadlockFebruary 19, 2014 18:25:55Hits: 1313We know that you can use the Profiler tool that comes with SQL Server to track

first, let's look at the instructions in the official help of nvarchar and varchar:varchar (n)Variable-length, non-Unicode character data with a length of n bytes. n must be a numeric value between 1 and 8,000. Storage size is the actual length of