dynamic query in sql server

There are many reasons for slow query speed in SQL Server databases. The following are common causes: 1. No index or no index is used (this is the most common problem of slow queryProgramDesign defects) 2. Low I/O throughput, resulting in a bottleneck effect. 3. the query is not optimized because no computing col

----------Create test table Declare @i int Set @i = 1 while @i - begin Insert intoTestlockSelect Right(Replicate('0',Ten)+ cast(@i as varchar(Ten)),Ten),'AAA','Fixchar' Set @i = @i+1 End Go----------Generate test Data View Code Code Deadlock Statement Declare @ID nvarchar(Ten) begin Tran Select Top 1 @ID =Id fromTestlock with(Updlock, Rowlock, Readpast)whereCol1= 'AAA' Order byIdASC Select @ID waitforDelay'00:00:20' UpdateTestlockSetCol1= 'BBB' whereId= @ID Commit Tran View Code

[Username],[subje Ct],[source] from [Testrows2columns]) P-PIVOT (SUM ([Source]) for [Subject] in (' + @sql_col + ')) as Pvt ORDER by Pvt. [UserName] ' PRINT (@sql_str) EXEC (@sql_str)(vi) Maybe a lot of people come to the above step is enough, but you will find that when others get your code, you need to constantly modify the table name in his own environment, grouping columns, row To column fields, field values of the parameters, as shown in logic 5, so I continue to modify the above scrip

(*), sex from student group by sex;Grouping statistics by age and gender combination and sortingSelect COUNT (*), sex from student group by sex, age order by age;Grouped by gender and are records with IDs greater than 2 finally sorted by sexSelect COUNT (*), sex from student where ID > 2 GROUP by sex Order by sex;Querying data with IDs greater than 2, and grouping and sorting results after completion of operationsSelect COUNT (*), (Sex * ID) New from student where ID > 2 GROUP BY sex * ID of OR

50 tips for optimizing query: (see which one is suitable for you) 1. Place data, logs, and indexes on different I/O devices to increase the reading speed. In the past, tempdb can be placed on raid0, which is not supported by SQL2000. The larger the data size (size), the more important it is to increase I/O. 2. vertically and horizontally split the table to reduce the table size (sp_spaceuse) 3. upgrade hardware 4. Create an index based on the

servers are Windows Server environments, all of which were written in Python with a monitoring script, and recently came across a need to add a Zabbix monitoring project, and I was thinking about using the bat batch I was doing my best to finish the project. No surprises, but with the help of the SQL Server command-line tool, the code is as follows: @ec

You can use the SQL-Server Enterprise Manager to create an instance. Pay attention to RPC and RPC out. You can also use SQL statements to complete the definition, which involves three stored procedures. Sp_addmediaserver, sp_serveroption, and sp_addmediasrvlogin. the syntax of the three stored procedures is as follows: Sp_addmediaserverCreate a linked

the same, then the greater than and equals sign are the same)1.select gid,fariqi,neibuyonghu,reader,title from Tgongwen where fariqi> ' 2004-1-1 ' and fariqiSpents: 3280 milliseconds4. The date column will not slow down the query speed because there is a minute or seconds inputIn the following example, there are 1 million data, 500,000 data after January 1, 2004, but only two different dates, the date is accurate to the day, before the data 500,000,

'the value of the Key5' fromheadertable awhereA.headerid= 10000 SELECTA.*, t.a0001 as 'the value of the Key1', t.a0002 as 'the value of the Key2', t.a0003 as 'the value of the Key3', t.a0004 as 'the value of the Key4', t.a0005 as 'the value of the Key5' fromHeadertable AInner Join (SelectHeaderid, Detailkey, detailvalues fromdetailtable) T Pivot (MAX(detailvalues) forDetailkeyinch(a0001,a0002,a0003,a0004,a0005)) T onT.headerid=A.headeridwhereA.headerid= 10000 　　

How do I retrieve the result set of a stored procedure (store Procedure) in a SQL Server query statement (Select)? (2006-12-14 09:25:36)Other descriptions of the same nature as this issue include:How do I get an execution result recordset for another stored procedure in a SQL Serv