performance comparison of sql and nosql databases

very low under this scenario. Adjust the code, this time using a partdescription grouping of type string. Test, the results are as follows. LinQ to Non-linq First time >30min 8.738 Second time >30min 4.201 Third time >30min 4.173 Forth time >30min 4.176 With this scenario, the NON-LINQ is a time-consuming increase, and the LinQ-mode is a horrible one. Even af

Tags: experience note method Bubuko class style Targe each nameFirst of all, SQL will be used to understand, not experts, the following are working experience, talk to lyric.Today to help verify the port of colleagues published, look at the relevant SQL content, found that its use of SQL statements will lead to Cartesian product phenomenon, in order to help expla

2009 40----result set pagination2--11start time Mon Oct 16:33:37 CST 20092---55end time Mon Oct 16:34:12 CST 2009 35200--11start time Mon Oct 16:34:59 CST 2009---55end time Mon Oct 16:35:32 CST 2009 3320000--11start time Mon Oct 16:36:26 CST 200920000---55end time Mon Oct 16:36:59 CST 2009 33210000--11start time Mon Oct 16:38:00 CST 2009210000---55end time Mon Oct 16:38:33 CST 2009 33100000--11start time Mon Oct 16:39:10 CST 2009100000---55end time Mon Oct 16:39:43 CST 2009 33JSP pages,

times, physical read 0 times, read 0 times, LOB logic read 0 times, lob physical read 0 times, lob read 0 times.Table ' Verifyprocess '. Scan Count 9, logical read 3,136 times, physical read 0 times, read 0 times, LOB logic read 0 times, lob physical read 0 times, lob read 0 times. The performance of this example looks like the total time overhead difference is not obvious, because the number of connected tables is small, and if the number of tables

Company Technical Background: Database Audit class (XXX. database. dll) calls the stored procedure to access the database. Technical solution 1: Compression timeProgramThe first version written by the employee is used to complete the task without any optimization from the program. The implementation method is to use the database metadata class to call the stored procedure and insert data one by one in a loop. Obviously, this method is not very efficient, so we have two colleagues discussin

After installing vs2008 beta2 today, I can't wait to try out the ORM function in LINQ. After a preliminary attempt, I found that the ORM in LINQ is still very good. I checked the system through reflection. data. LINQ. DLL found that the ORM in LINQ completes or ing Using Reflection. Based on this, I began to doubt the performance of ORM in LINQ. To further study the problem, I wrote a simple test. In a transaction, I used datarabbit 3.0 and LINQ to

By repeatedly executing the INSERT command into the database, compare the performance of accessing SQL Server by ADO. Net ole db provider, ADO. Net SQL provider and ADO. Net ODBC provider. { Function onclick () { Function onclick () { This. style. display = 'none'; document. getelementbyid ('Code _ closed_text_163726 '). style. display = 'none'; document. getele

be used Use_hash (table_name1 table_name2) hint to force a HASH join 1. Hash joins are a common way for the CBO to make large data set connections. 2. You can also use the Use_hash (table_name1 table_name2) hint to force a hash connection 3.Hash join when the amount of data in two tables varies greatly. The 4.Hash join works by hashing a table (usually a smaller table), storing the column data in a hash list, extracting records from another table, doing hash operations, and finding the correspo

Ceiling (Row_number () over (the order by ID ASC))/' +str (@pageSize) + ') as page_num,* from Tb_testtable) '; Set @strSql = @ctestr + ' select * from table_cte where page_num= ' +str (@pageIndex) end begin Execute sp_ ExecuteSQL @strSql Select DateDiff (MS, @datediff, GetDate ()) set NOCOUNT off; End Of the five methods mentioned above, the third method that utilizes select top and intermediate variables is the most efficient. All about the five methods of