SQL Server

The SQL Server 2005 settings are as follows:1. run SQL Server Surface Area Configuration-> Surface Area Configuration for features-> select Database Mail-> select Enable Database mail stored procedures2. Choose SQL Management Studio> Management>

SQL Server itself provides such a DMV to return this information, which is sys. dm_exec_sessions.For example, make a query on my machine:Copy codeThe Code is as follows:SELECT * FROM sys. dm_exec_sessions WHERE host_name IS NOT NULL We can also

The following are the custom functions of Infor syteline 8.02:Copy codeThe Code is as follows:MidnightOfAlter function [dbo]. [MidnightOf] (@ Date DATETIME) RETURNS DATETIMEASBEGINRETURN (dateadd (year, (datepart (year, @ Date)-2000), dateadd (month,

Sqlsever specifies the explicit value for the ID column. Most of them are in two tables with the same structure. One Table inserts data with the specified conditions in the other table, and the following error is reported:Only when the column list

1. Define table VariablesCopy codeThe Code is as follows:DECLARE @ T1 table(UserID int,UserName nvarchar (50 ),CityName nvarchar (50)); Copy codeThe Code is as follows:Insert into @ T1 (UserID, UserName, CityName) values (1, 'A', 'shanghai ')Insert

B-tree 1. B-tree Definition B-tree is a balanced multi-path search tree that is useful in file systems. Definition: an m-Level B-tree, an empty tree, or an m-tree that meets the following features:(1) Each node in the tree has at most m Subtrees;(2)

GROUPThe disadvantage of a clause is that the returned result set only contains the total data without the original detailed records. To do this in SQL SERVER, you can use the COMPUTE BY clause. The sum generated by COMPTE is used as an additional

Yesterday, we found that the data analysis results in the program were incorrect. After the analysis was performed again, the original data was still there and the fields with values were accumulated. The heart said, No, It was analyzed only after

The reason for this problem is that a user connects to the database to be restored, and the users here even include the users to be restored. The solution is to close all connections to the database to be restored. ① Switch the database to the

Copy codeThe Code is as follows:Create procedure test_tranAsSet xact_abort on ----- judge by @ error. For serious errors, the system will not execute the subsequent judgment on @ error, and the execution will be terminated directly. Therefore, it is

Recursive queries using CTE (common table expressions) ---- SQL Server 2005 and later versions A common table expression (CTE) has an important advantage: It can reference itself to create a recursive CTE. Recursive CTE is a public table expression

Assume that there is a table in the database. The table Name is UserName, and the fields are ID (int), Name (nvarchar), and Age (int ).If the stored procedure without query conditions is:Copy codeThe Code is as follows:Create procedure [dbo].

How to determine the existence of a table or database in SQL server, but in actual use, you need to determine the Status bit:Some status bits can be set by the user using sp_dboption (read only, dbo use only, single user, etc: 1 = autoclose; Use

Copy codeThe Code is as follows:Public bool SaveSMSMessage (SMSBatch smsBatch, DataSet smsMessages){// Using (TransactionScope ts = new TransactionScope (transactionscospontion. Suppress ))//{Foreach (DataRow row in smsMessages. Tables [0]. Rows)Row.

Situation reproduction:The company launched a new project. On the first day of its launch, it found a network IO bottleneck between the database server and the IIS server in the background. The 1 GB network bandwidth occupied 2nd-70%, that is, data

Misunderstanding #18: Several misunderstandings related to FileStream All Errors 18 a) FileStream data can be stored remotely No, because the FileStream data container (which refers to the NTFS folder that stores the FileStream file, the fabricated

In an error report, only the fields related to this Article are listed as follows: ReportPerson, ErrorID, and ReportTime) status, where the values are 0 (not resolved), 1 (processed), and 2 (resolved ).What we need to do now is to count the total

For a data table with an automatic growth identifier, its field value is automatically set by the database, which is very troublesome when importing data.When we export data, we often think about importing the data of the identified field. What

There are many problems with SQL Server connection. If you do not set it, you cannot connect it. Please note here! (Some materials are from the Internet) Problems with JDBC connection to MySQL (The example contains the JDBC2005 driver. In the lib

SQL Server caches frequently used data in memory (that is, data page cache) to speed up data access. Because the disk access speed is much lower than the memory, reducing disk access volume is also an important aspect of database optimization.When