SQL Server

There are five types of constraints in SQL Server,Primary key constraints,Foreign key constraints,Unique constraints,Default constraints, and Check constraints, use SQL Server2008 today to demonstrate how these constraints are created and used.

Microsoft's SQL Server version, in addition to many very quickly, from the earliest version to the current SQL Server 2017, each iteration of the version has updated a lot of features and enhanced stability, security, and so on, but starting with

13.4 Fail-Over13.4.1 Fault LocationAs explicitly mentioned in the previous sections, log shipping consists of three basic jobs: backup jobs, copy jobs, and restore jobs. Use the previous festive log transfer monitoring function to locate which job

SQL Server Audit (Audit)--Create a database-level auditTask 1: Create an auditStep 1 : open SSMs, log on to the specified instance, expand the "Security", "audits" node.Step 2 : on the audits node, right-select the "New Audit ..." option.Step 3 : in

Original: 64-bit SQL Server how to use a linked server to connect to accessTest environmentOperating system version: Windows Server R2 64-bitDatabase version: SQL Server 2005 64-bitMany tutorials on the Web show you how to connect to access using a

Here's how:One, enable remote connections for SQL Server 20051. Click Start, select Programs, choose Microsoft SQL Server 2005, configure tools, and then click SQL Server Surface Area configuration.2. On the SQL Server Surface Area Configuration

Recently in a project, the database for the project was Microsoft's SQL Server, the database was installed on a different Windows servers, and the project was deployed on Ubuntu server. So how do you link SQL Server to your project on Linux? Here I

Bit integral typeThe bit data type is integral, and its value can only be 0, 1, or null. This data type is used to store data that has only two possible values, such as Yes or No, True or false, on, or off.Note: A data type that is space-saving and

In SQL Server performance tuning, there is an aspect problem: How do you work with temporary datasets in code that takes a long time or is frequently called? Table variables and temporary tables are two choices. Remember that a large number of

The code to modify the database sa account name is as follows:The code is as follows:Alter LOGIN SA DISABLEAlter LOGIN sa with NAME = [Systemaccount]"Systemaccount" is the new name of SA, refresh the right login after execution to see the successful

This article is the second in the SQL Server Security series, please refer to the original text for more information. Validation is the process of examining the subject. The principal requires a unique identity, so that SQL Server can

Reprinted from: http://www.lmwlove.com/ac/ID943Usage of ROWCOUNT:The function of rowcount is to restrict the subsequent SQL to stop processing after returning the specified number of rows, such as the following example,SET ROWCOUNT 10SELECT * FROM

As a result of previous needs, the replication schema change was forbidden, and a field was added to the publication and not synced to the subscription, and now a field with the same name was added to the subscription, so how do you make the two

The reasons for the slow query are many, and the following are common:1. No index or index is not used;2, I/O throughput is small, forming a bottleneck effect;3, insufficient memory;4, the network speed is slow;5, the amount of data queried is too

Microsoft SQL Server Error: 15138 failed to delete the database because the database owner has a schema in the database and cannot delete the database. Solution An error occurred while deleting the *** user. (Microsoft. sqlserver. SMO) Click:

Completely free Asp.net 2.0 space and support for SQL Server Express, no advertisement, I have applied to activate Http://aspspider.net/bestcomy (pass by a friend please leave a word) We have limited number of servers and new registration will

Let's start learning about SSIS and use SSIS to export data from SQL Server. First, open vs.net 2005, select the Business Intelligence Project, select the integration service project in the template, and enter the Project name: After the

What is parameterized query? A simple way to understand parameterized queries is to think of it as just a T-SQL query that accepts parameters that control what the query returns. By using different parameters, a parameterized query returns different

1. If you are using win2003, you must install the SQL patch sp3a. Check whether your SQL has been patched. If not, install a patch. You can run the patch in the query Analyzer:Select @ versionIf the version is earlier than 8.00.760, it indicates

There are many reasons for slow query speed. The following are common causes:1. No index or no index is used (this is the most common problem of slow query and is a defect in programming)2. Low I/O throughput, resulting in a bottleneck effect.3. the