SQL Server

1. Batch Processing Batching refers to a group of statements that contains one or more T-SQL statements that are sent from the application to the SQL Server server at once. The SQL Server server compiles the batch statement into an executable

Tags: SQL server/mssql server/database/dba/failback/masterOverviewSQL Server maintains a set of system-level databases, called system databases, that are critical to the operation of the server instance. You must back up multiple system databases

plan cache is very large and will be purged only once with the cached plan, without clearing the entire cache.declare @sid varbinary declare Cursor Forselect plan_handle from (SELECT plan_handle from Sys.dm_exec_cached_plans as CP Cross APPLY Sys.

When you delete a field from a database table, you use the ALTER TABLE table name drop column nameThe error returned by the server is:Server:msg 5074, Level A, State 1, line 1The object constraint name is a dependent on column name.Server:msg 4922,

First KindSELECT title,SUM (Case typeid if ' 1 ' then gjdate ELSE 0 END) as ' take some ',SUM (case typeid if ' 2 ' then gjdate ELSE 0 END) as ' leave ',SUM (Case typeid if ' 3 ' then gjdate ELSE 0 END) as ' overtime 'From LFIL_TBGROUP by TitleThe

Today, the problems encountered in the work, the problem is solved, after the internet to find a bit, excerpts as follows:Net Framewrok,Datetime.minvalue = 0001/01/01 00:00:00SqlDateTime.MinValue.Value = 1753/01/01 00:00:00DateTime.MaxValue = 9999/12

I. Basic 1, Description: Creating a DatabaseCREATE DATABASE Database-name2. Description: Delete DatabaseDrop Database dbname3. Description: Back up SQL Server---to create a device that backs up dataUse masterEXEC sp_addumpdevice ' disk ', ' testback

Two. Querying for missing valuesHere we join to query 2008 how many orders per day? We can start by querying all order information for the order date in 2008 of the order form.1 SELECT DISTINCT orderdate,count (*) as N ' daily order volume ' from

Many of the developers of the comrades, believe that in the first use of SQL server2008+c#2012 (more than 2012 version) will appear in the following picture of the problem, because the installation of Visual Studio 2013 or 2012, will automatically

Let's talk about it today.Bulk Change Mapping (Bulk Changed Map:Bcm) page, and how the bulk-logged Recovery model ( bulk logged recovery model ) works. bulk change mapping (Bulk Changed map:bcm): SQL Server uses BCM pages to track areas modified by

My SQL Data type SQL Server Data types Yes/no Bit Smallint (byte type) tinyint Integer (Long integer type) Int Real (single-precision floating-point type) Real

Original: 1th week how SQL Server executes a queryHello everyone, Welcome to the 1th week of SQL Server Performance Tuning training . Before we go into the tedious details of SQL Server performance tuning, I want to build the foundation by

1. First determine your own IIS no problem2, second to determine their own SQL Server no problemThen in the IIS folder Wwwroot, create a file named Testsqlserver.asp, write code such as the following can be spt_values lines:" &rs.recordcount& "") '

In general, C # Connections to SQL Server strings can be directly written directly in the documentation, or you can refer to the famous connectionstrings manual spellingBut if you are already connected to SQL Server you can also get the current

Hello everyone, Welcome to the 1th week of SQL Server Performance Tuning training . Before we go into the tedious details of SQL Server performance tuning, I want to build the foundation by explaining how SQL Server executes a query. This part is

Recently in the first phase of optimization, the database of the most time-consuming first n statements to query out!SELECT TOP qp.query_plan,qt.text,total_worker_time from sys.dm_exec_query_stats cross APPLY sys.dm_exec_ Sql_text (sql_handle) QT

Transferred from: http://blog.sina.com.cn/s/blog_8020e41101019k7t.htmlSELECT field1/field2 from TB;When the value of Field1 > Field2, the result of division is This time, in the DB2 environment, the value of select is 0.How to resolve:First convert

Recently, in the interview, met a wonderful bald old man interview officer.Q: Have you ever written a stored procedure paging?A: not written, but I know the principle of paging storage, I wrote it myself, just did not write at work.Q: So you haven't

Roughly divided into characters, 2 binary, numeric, date, other typesCharacterChar is fixed-length. such as char (8), the character you enter is less than 8 o'clock, and it will be followed by a null value. When you enter a character that is larger

From:http://www.cnblogs.com/hoojo/archive/2011/07/20/2111316.htmlA trigger is a special type of stored procedure that differs from the stored procedure we described earlier. Triggers are triggered primarily by an event that is automatically invoked