query tuning in sql server

I like to think of the tools bundled with SQL servers as inverted pyramid. Tools for diagnosing and checking general problems are at the top, and tools for finding and diagnosing specific areas of problems are at the bottom. In addition to providing a convenient way to write SQL scripts, the Query Analyzer still needs to use resources when you need to solve speci

Solution Overview:1. Change the file name during file storage2. Configure the Indexing Server and associate the Indexing Server with the ms SQL Server.3. Modify the SQL statement and add the content of the full-text query statemen

In the previous description of SQL Server parameterized query's where in and like implementation, we introduced several implementation schemes for SQL Server to use parameterized query where in, with XML and Table value parameters missing, here is a supplement ArticleGuide

The optimization scheme of SQL Server Multi-table query is the main content of this article, we give the optimization scheme and specific optimization examples, then let us take a look at this part of the content. 1. Execution path This feature of Oracle greatly improves the performance of SQL and saves memory usage:

After a while, we finally have time to complete this series. The official SQL Server 2008 version has been released. The subsequent series will be developed based on SQL Server 2008 + vs.net 2008. IntroductionIn a B2B project, the boss wants to see all the new order information every day. The boss is very lazy and does

IntroductionIn SQL Server, an index is an enhanced presence, which means that even without an index, SQL Server can still implement its due functionality. However, indexes can greatly improve query performance in most cases, especially in OLAP. To fully understand the concep

Label:The join table operator operates on two input tables. There are three basic types of joins: Cross joins, Inner joins, and outer joins. The difference between the three types of joins is that they take different logical query processing steps, each of which has a set of steps. The cross join has only one step----cartesian product, the inner join has two steps----Cartesian product, filtering, and the outer join has three steps----Cartesian product

I'm sure you'll often encounter problems exporting SQL Server query results to Excel. If you export fewer times, direct "Save Results as ..." Just 1.1 Prepare the query statement. 1.2 Select the database, start the Import and Export Wizard 1.3 Select a data source 1.4 Select target

Tags: har bubuko name nbsp png def next members turnTo come to the point, first of all, the problem encountered: the pre-system Area dictionary table, each province and county only saved the name of this level, the Complete field is not stored. such as: Feixi County under the Anhui province Hefei, the table has saved a Feixi County. The existing requirements need to display the full field, because the system has been operating online, unable to make too many complex changes, the initial plan is

University 0The class SQL statement for the result collection that is obtained recursively for the 2nd time is:Select Tree.id, Tree.name,tree.parent,cast (Replicate (", Len (cte.te)) + ' |_ ' +tree.name as nvarchar (MAX)) as Te,levle+1 As Levlefrom tree inner join (select ID, Name,parent,cast (Name as nvarchar (max)) as te,0 as Levle from tree where Parent is null) as Cteon tree.parent=cte. NameThe result of the above CTE subquery is the result set

Perhaps the most common mistake found in the application code is such a query request: instead of using a prepared query or program, instead of requesting data from the database using a nonparametric ad hoc query. Not preparing your query or not using stored procedures can add unnecessary

Original: SQL Server performance Optimization nolock, greatly improve database query performanceThe company database grows with time, the data is more and more, the query speed is also more and more slow. Into the database to see a bit, hundreds of thousands of of the data, the que