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server process session ID of the current user process. @ @SPID can identify the current user process in sp_who output results.ExampleThe following example returns the process ID, login name, and user name of the current user process. SELECT @ @SPID as ' ID ' System_user as ' Login Name ' USER as ' User Name ' Here is the result set: ID Login Name User Name
----- ------------- -----------
11 sa dbo [Email pro
Use Windows performance monitor to monitor common SQL Server metrics
As mentioned in the above article, Win's Performance Monitor is an essential tool for monitoring database performance. Next I will introduce some common monitoring metrics, which are nothing more than disks, CPUs, memory and other hardware operating i
Label:The above article mentions that win's performance Monitor is a necessary tool to monitor database performance, and then I will introduce some common monitoring indicators, in fact, the disk, CPU, memory and other hardware operating indicators and the database itself like the lock Ah, the number of user connections Ah, There are parameter indicators that need attention according to their own business decisions.1.
The four most common errors in SQL Server 2000 connection:
1. "SQL server does not exist or access is denied"This is the most complex. There are many causes of errors and there are many aspects to check.Generally, there are several possibilities:1. incorrect spelling of the
The four most common errors in SQL Server connection:1. "SQL server does not exist or access is denied"This is the most complex. There are many causes of errors and there are many aspects to check.Generally, there are several possibilities:1. incorrect spelling of the
Label:Original: Common SQL Server specificationCommon field type selection 1. The character type is recommended for the Varchar/nvarchar data type 2. Money data Type 3 is recommended for the amount currency . Scientific counting suggests the use of numeric data types 4. Since the growth of the logo is recommended to use the bigint data type (a large amount of da
Brief introductionFor select query statements, in general, in order to make T-SQL code more concise and sustainable, the introduction of additional result sets in one query is decomposed through views, not subqueries, but the view is in the database as a system object, That's a bit of a luxury for a result set that needs to be used only once in a stored procedure or user-defined function.A common table expr
the graphic interface. Therefore, you are familiar with common command line operations. The following describes the SQL Server command line tools isql and osql.The isql utility allows you to enter Transact-SQL statements, system processes, and script files, and use DB-Library to communicate with
It may be a problem because of the operating system, or if you installed SQL 2008 with other versions of SQL, so that our actual experience and ability to test our hands are also very important so that we can make detours less.
Issue 1: Installing SQL Server 2008 R2, prompting for errors during installation: An earlie
\sqlserveragent login failed because the MSSQLServer instance was trying to connect with its SQL Server proxy account, but in the MySQLServer instance, The agent's account is not correct. So change the way subscribers are connected. Local subscriptions at the Subscriber are not viewable and can be viewed under the corresponding publication in local publishing at the publisher. Here, modify the way the Sub
the execution statements on all the databases can be monitored. You can also set duration to filter SQL statements for different execution times, such as SQL statements that can be filtered for longer execution times, and select to optimize SQL statements. What if the same database, multi-person access, only want to detect the statement of their own actions? You
The most common solution for SQL Server data import and export is to import and export data.
Currently, ASP and PHP are mainly used for website construction. The databases used in these two languages are SQL Server and mysql, respectively. These two databases have their resp
A common performance counter for SQL Server servers, in this flag.
Performance object
Counter
Description
Processor
%processor time%privileged time
Recommended value: lasts less than 80Recommended value: lasts less than 10
System
Processor Queue Length
Thread Queue Length waiting for processo
Comparison of common functions for SQL Server to Oracle
1. Absolute ValueS: Select ABS (-1) ValueO: Select ABS (-1) value from dual
2. INTEGER (large)S: Select ceiling (-1.001) ValueO: Select Ceil (-1.001) value from dual
3. Round (small)S: Select floor (-1.001) ValueO: Select floor (-1.001) value from dual
4. Round (truncation)S: Select cast (-1.002 as INT) Valu
of one or more columns of a non-primary key, and a table can define multiple unique constraints. Right-click the column you want to set to select the Index/key. And then click the Add button. Select the columns you want to set, either a column or a combination of multiple columns. Close and save the settings. 4. Default constraint If a default value constraint is defined in a table, when a user inserts a new data row, if the row does not have the specified data, the system assigns the defaul
Several common SQL Server statements without using GO -- query the number of rows in the database to print the table name and number of rows greater than 0. DECLARE @ TableNameVARCHAR (128) declarepostcursorforselectnamefromsys. tablesOpenPostCu
Several common SQL
A common problem with SQL Server is the SQL problem, which is mostly due to high CPU and blocking.
One, the problem of high CPU
1, query system Dynamic View query execution time of the SQL statement
With Processcte (blocked) as
(
Select a spid from sys.sysprocess
1. Character functions:
The characters in SQL Server are case-insensitive.However, the lower and upper functions are common in SQL Server, Oracle, and DB2. For example, select empno, ename, deptno from EMP where upper (ename) = upper ('bucket ');
Example of connection chara
How to view disk I/O operation information
The set statistics io on command enables SQL Server to display information about the disk activity volume generated by the Transact-SQL statement.
We can analyze the index performance very effectively.
After this attribute is enabled, we will receive information similar to the following after executing the
Server|sqlserver| data based on their usual experience common class libraries for SQL Server operations
Using System;
Using System.Data;
Using System.Data.SqlClient;
Using System.Web;
Namespace WHGW_LC
{
Summary description of Data.
Database related Operations class
Author: Darkangel
Time: 2004-9-24
public class Data
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