sql stored procedure performance tuning

creation, each subsequent execution of the stored procedure does not need to be compiled, and the general SQL statements are compiled once per execution (so some of the complex logic of SQL recommendations written in the stored procedures);

What is a stored procedure?Store common or complex tasks in advance with SQL statements and a specified name, when you call the database tutorial to provide services with the same functions as the predefined stored procedure, you only need to call execute to automatically co

1. SQL database stored procedure parameters How can I use parameters in the stored procedures of SQL database as both output variables and output variables? [SQL] view plaincopy -- drop proc proc_test -- Go Create proc dbo. proc_t

SQL Server database development-stored procedure application SQL SERVER database development-stored procedure application Some may have been using SQL SERVER for development for some t

1/What are stored procedures and conceptsA stored procedure in Transact-SQL, very similar to. NET language, which can be called repeatedly. After the stored procedure executes once, the statement can be cached so that the statemen

1. How to obtain the value returned by return for a stored procedure(1 ):Return returns a value.Create procedure testreturnAsReturn 145Go -- Query calls in Analyzer-- Declare @ RC int-- Exec @ rc = singlevalue-- Select @ RC (2 ):Output Return ValueCreate procedure testoutput@ P1 int,@ P2 int output,@ P3 int output,@

Advantages of Stored Procedure Why use stored procedures? The following are the main advantages of Stored Procedure technology: Pre-compiled execution program. SQL Server only needs to compile each

Advantages of Stored Procedure Why use stored procedures? The following are the main advantages of Stored Procedure technology: Pre-compilation and executionProgram. SQL Server only needs to compile each

Tags: style HTTP color using OS dataDefinition: the stored procedure (Stored Procedure) is a large Database System , a set of SQL statements to complete a particular function, compiled and stored in a database, is executed by the

, @level = @IntVariable ThisSp_executesqlThe tasks completed in the example are the same as those completed in the previous EXECUTE example, but they have the following additional advantages: Because the actual text of the Transact-SQL statement has not changed between two executions, therefore, the query optimizer should be able to match the Transact-SQL statement in the second execution with t

SQL Server stored procedure syntax:Create PROC [edure] procedure_name [; number] [{@parameter data_type} [VARYING] [= default] [OUTPUT]] [,... n] [with {RECOMPILE |Encryption | RECOMPILE, encryption}] [for REPLICATION] as sql_statement [... n]First, a brief introduction of the parameters 　 1, procedure_nameThe name of the new

article still depends on the specific situation) CLR Data AccessCLR accesses data through Sqlclient, so the code is relatively lengthy, but the query statement used for the final query is the same as the T-SQL.For most procedural computing, CLR represents a decisive advantage, but only data access T-SQL prevails. B. CLR vs. XPsCompared with stored procedures, CLR has the following advantages:1. granular co

server| Stored Procedures | There are many articles accessing ASP and stored procedures (Stored procedures), but I doubt whether the authors have actually practiced them. I have consulted a lot of relevant data at the beginning of the class, and found that many of the methods provided are not the case. For simple applications, this information may be helpful, but

Two days ago, we briefly learned about a special stored procedure-trigger. Today we want to write some simple theoretical and practical knowledge about the stored procedure. First, we need to understand what is a stored procedure

Check Google, this approach can solveMy stored procedure is this:CREATE procedure Cal_month_dep_fast @begdt datetime, @endt datetimeAs。。。。。。。。。Select Dep_no, Prod_no, Batch_no, Prod_add, Dep_date, Dep_num, Inv_num,lest_num, Buy_price from #tempresultThe LINQ to SQL can be resolved by the following methods1 Build a Clas

Label:The use of triggers is described in the previous blog, and the trigger is a special stored procedure, so what is a stored procedure? TheyWhat is the difference between the two?In fact, the most basic difference is that the trigger is run by the system itself when the condition is met, and the

From: http://www.cnblogs.com/chillsrc/archive/2008/04/15/1154186.html I. Environment and test requirements 1. Test Environment ① Hardware: CPU: 2 GB, memory: 2 GB ② Database: SQL 2005 The result varies depending on the machine configuration. 2. Performance Test Description ① Query after the database server is restarted, that is, the result of the first query.② Compare the

The following articles mainly describe the practice solution for getting started with DB2 pure SQL stored procedures. The actual operation background is that I am currently using Birt In the DB2 9.1 database, you need to write the pure SQL stored procedure of the DB2 databas

) select gid from TGongwenWhere fariqi> dateadd (day,-365, getdate () order by fariqi descSelect O. gid, O. mid, O. title, O. fadanwei, O. fariqi from TGongwen O, @ indextable tWhere O. gid = t. nid and t. id> @ PageLowerBoundAnd t. id End The stored procedure above set nocount off uses the latest SQL SERVER Technology-table variables. It should be said that this

lot of emphasis on T-SQL, and here's a list of common points: first, the DBMS processes the query plan: 1. Lexical and grammatical checking of query statements 2. Query optimizer to submit statements to the DBMS 3 optimization of optimized algebra and access paths 4. Generate query plan by precompiled module 5, and then at the appropriate time to submit to the system processing execution 6, finally return the execution result to the user next, look a