sql stored procedure performance tuning

SQL Server focuses on optimization of Stored Procedure performance, data compression, and page compression to improve IO performance (I ). Preface The SQL Server basic series is not over yet, And the last point is not written, and

stored, the maximum value and the pointer to the next primary leaf level block, or a non-leaf level block (pointer), where the pointer is the file number + block number of the block. In the B*tree block of Oracle, the key value of the indexed column is stored +rowid (the file number + block number + slot number of the data row) so that the data rows in the table can easily be found through the index by the

When software development uses Microsoft sql2005 to store data, there are multiple methods to retrieve information. There are dynamically generated SQL statements and stored procedures. But is their performance the same? Download the test program and source code Test Description: The purpose of this test is to compare whether the execution time of dynamic

@timediff datetimebeginsetnocounton;select@timediff=getdate()selectNBSP; * NBSP; from NBSP; ( Select NBSP; *,row_number () over (order NBSP; by NBSP; ID ASC NBSP; as Idrank NBSP; from NBSP; tb_ testtable) NBSP; as idwithrownumber NBSP; where idrank> @pageSize * @pageIndex and idrank selectdatediff(ms,@timediff,getdate())as耗时setnocount off;end---5、利用临时表及Row_numbercreate procedure proc_CTE --利用临时表及Row_number(@pageIn

millisecondsPage5: 3 seconds 421 MsPage6: 3 seconds 515 MsUse ROW_NUMBER () for statistics only on the first page:Page1: 2 seconds 937 millisecondsPage2: 0 seconds 218 millisecondsPage3: 0 seconds 359 millisecondsPage4: 0 seconds 468 millisecondsPage5: 0 seconds 578 millisecondsPage6: 0 seconds 687 millisecondsConclusion: In the stored procedure, if the total number of records is counted each time, the eff

SQL statement Stored Procedure query performance test comparison code. SQL statement Stored Procedure query performance test comparison code

Tags: and fast speaking tuning market buffer way a completely"High-performance SQL Tuning essentials and Case Resolution" a book has been launched, many enthusiastic readers on the contents of the book and some of the specific questions raised questions, because of the numerous readers plus my daily work busy, here on

of pages as SET NOCOUNT on IF ISNULL (@TotalCount, ') = ' Set @TotalCount = 0 Set @Order = RTRIM ( LTRIM (@Order)) Set @PrimaryKey = RTRIM (LTRIM (@PrimaryKey)) Set @FieldList = REPLACE (RtriM (LTRIM (@FieldList)), ', ') while CHARINDEX (', ', @Order) > 0 OR CHARINDEX (', ', @Order) > 0 BEGIN SET @Orde R = Replace (@Order, ', ', ', ') SET @Order = replace (@Order, ', ', ', ') END IF ISNULL (@TableName, ') = ' OR ISNULL (@F Ieldlist, ') = ' or ISNULL (@PrimaryKey, ') = ' or @SortType Call Metho

"; Stopwatch st2 = new stopwatch (); St2. Start (); Sqlparameter[] para = {}; Repeater1.datasource = Jinlong.Data.DBHelper.RunProcedure ("Selectbytitle", Para, "DS"); St2. Stop (); Label2.Text = St2. Elapsedmilliseconds.tostring () + "MS"; The results are as follows: Label1 Label2 52ms 48ms 39ms 46ms 45MS 44ms 43ms 42ms 37ms 40ms 43ms 44ms Conclusion: SQL statements and stored procedures are about the sa

1. Create Database Liezui_Test ID int primary key auto-Increment Title varchar (100) ReadNum int 2. Insert 1 million data records into the databaseDeclare @ I int Set @ I = 1 While I Begin Insert into Liezui_Test (Title, ReadNum) values ('total execution statistics', @ I) Set @ I = @ I + 1 End GO Declare @ I int Set @ I = 1 While I Begin Insert into Liezui_Test (Title, ReadNum) values ('towels are prone to harmful bacteria because they are often wet. ', @ I) Set @ I = @ I + 1 End GO 3. added

1. Create Database Liezui_Test ID int primary key auto-IncrementTitle varchar (100)ReadNum int2. Insert 1 million data records into the databaseDeclare @ I intSet @ I = 1While I BeginInsert into Liezui_Test (Title, ReadNum) values ('total execution statistics', @ I)Set @ I = @ I + 1EndGODeclare @ I intSet @ I = 1While I BeginInsert into Liezui_Test (Title, ReadNum) values ('towels are prone to harmful bacteria because they are often wet. ', @ I)Set @ I = @ I + 1EndGO3. added the SelectByTitle

In SQL Server database operations, we often use stored procedures to implement the query data paging to facilitate the browsing of the viewer. To create a database data_test: Create DATABASE data_test go use data_test go create table tb_testtable --Creating Tables ( ID int Identity (1,1) primary key, userName nvarchar not null, userpwd nvarchar (.) not NULL, UserEmail nvarchar () nul

SQL database Stored Procedure example parsing and SQL stored procedure example What is a stored procedure:Stored procedures can be said to be a record set, it is a code block composed o

the Set TRACE function in Sqlplus analysis of performance and index usage of statements by toad or PL/SQL developer not satisfied with Oracle default optimizations you can force the use of hint, but it is generally not recommended It is generally not recommended to index a field that stores only or no information for flag. You can use bitmap indexing if necessary * There is a recursive query situation

increase the simultaneous processing capacity Determine earnings Determine cost Monitoring tasks with common bottlenecks Monitor memory usage Monitor thread and CPU usage Monitor hard disk I/O Monitor low-performance queries Monitor stored procedures, SQL, and user activities Monitor current locks and user interactions Create a

SQL stored procedure definition and stored procedure benefits SQL stored procedure definition and stor