SQL Server

A few days ago, I saw someone asking why I couldn't see SQL server statistics on a table. This table is a newly created heap table with no indexes and has never been accessed. To answer this question, we need to go back to how SQL Server creates and

A problem occurred recently during bug fixing. The system dynamically creates a view based on the number of projects to combine some data of all projects. When the number of projects in the system exceeds 256, the problem occurs. SQL Server throws

1. Add port to the connection string when connecting to the databaseSQL Server Port: We can use "server network trial tool" and "client utility"The setting method is as follows:· Use server network trial tools and client utilities respectively"· Set

1. Create a connection object for the sqlconnection classSqlconnection mysqlconnection =New sqlconnection ("Server = localhost; database = northwind; uid = sa; Pwd = sa ");// Server specifies the name of the computer that runs the SQL statement.

A table named TQ has the following structure:Tq1, varcharTq2, varcharIn the Enterprise Manager, create a stored procedure:Create procedure inserttqAsInsert into TQ(Tq1, tq2, tq3)Values('A', 'B', 'C ')GoThere are no errors in the syntax of Several

  Shanghai mini-invasive software Co., Ltd. Xiao guidong Target readers: Medium and advanced Microsoft SQL Server users Metadata Overview The most common definition of metadata (metadata) is the structure data about the data, or simply the

Error 1069-(unable to start the service due to logon failure .), The operation is being performed on the MSSQLServer service.There are already many solutions to this problem on the Internet. The simplest solution is to reinstall sqlserver and choose

In some cases, familiarity with the use of SQL Server wildcard can help us solve many problems.   -- Use the _ operator to search for the names of the three letters ending with an in the person table Useadventureworks2012; Go Select firstname,

Today I tested a logshipping for multiple database instances (Test Database dblogtest, master server instance sql2k8, secondary1 instance R2, secondary2 instance sql28). The steps are as follows:   1. Back up the logshipping database in sql2k8   2.

In sqlserver 2012 always on, we can create an availability group listener to provide client connections to the database of the given availability group. The availability group listener is a virtual network name (vnn) that the client can connect to

During SQL server startup, the startup information will be read from the Registry first. Sometimes, when SQL Server cannot be started, we need to modify the registry. But where is the SQL server information stored in the registry? I have been

A friend once asked me if my data was deleted and when it happened without using a third-party tool. SQL Server provides an uninitialized ented function fn_dblog, which allows us to view the active transaction log. Syntax: : Fn_dblog (@ startinglsn,

You may encounter SQL server connection issues when using databases. In many cases, the SQL Server tool is not installed on the client. You can use TelnetOr ping command to determine the problem, but for users who do not know, there may be no

As we all know, SQL Server transactions are a single unit of work. If a transaction succeeds, all data modifications made in the transaction will be committed and become a permanent component of the database. If the transaction encounters an error

SQL Server tips: Recovery interval Author: drillchina, source: blog, responsible editor: Wang xiaochen, Http://database.ctocio.com.cn/tips/111/8248611.shtml is well known, SQL Server rely on log to ensure performance and data persistence without

From http://www.mssqltips.com/tip.asp? Tip = 2045Using hints to test indexes in SQL ServerWritten by: Ken Simmons -- 6/24/2010 -- 1 comments -- print -- free stuff -- ProblemWhen tuning indexes, it is somewhat difficult to tell how much

Question 1: Why do I need to introduce table variables when a temporary table already exists?Solution 1: Compared with a temporary table, table variables have the following advantages:• Table variables (such as local variables) have clearly defined

There are two examples in the previous two blogs to demonstrate the content to be told. Some methods for viewing the database status are mentioned, which is not very comprehensive. This blog lists several of the statuses and data that we will use in

Use SQL statements to create and delete Constraints Primary constraints: (primary key constraint); unique constraints: (unique constraint); check constraints: (check constraint); default constraints: (default constraint); external constraints:

I just got my graduation certificate a few days ago. I reported to my company yesterday and started my career again. There are so many joys and sorrows. From now on, I am no longer a student. Today, the manager asked me to write a small program to