best database for large data

Label:It's always a matter of handling large volumes of tens data. Recently in the processing of the exact time out, the program will have to stop for a period of time to restart the server, according to several adjustments to find the problem, the problem is mainly caused by the following points:1, the database connection is not closed, a

); }} Console.WriteLine ("transcoding Complete, total transcoding {0} bar data", Count); Console.WriteLine ("start importing data, please wait a moment"); stringsql ="BULK INSERT Test.dbo.BagDataTable from ' C:\\users\\administrator\\desktop\\writedemo.csv ' with (fieldterminator= ', ', batchsize=100000,firstrow=2)"; Try{dbhelper.executesql (SQL); } Catch(Exception ex) {using(StreamWriter Writer

to this way:CREATE TABLE #t (...)13. It is a good choice to use exists instead of in.Select num from a where num in (select num from B)Replace with the following statement:Select num from a where exists (select 1 from b where num=a.num)14. Not all indexes are valid for queries, SQL is optimized for queries based on table data, and SQL queries may not take advantage of indexes when there is a large amount o

1. Indexing, clustered and nonclustered indexes are established. Clustered indexes are physically contiguous, nonclustered indexes are physically discontinuous, and index tables are used to find data. Only one clustered index can be built per table 2. This article talks about a more comprehensive Http://blog.csdn.net/softeer/archive/2005/11/08/525353.aspx 3. When the amount of data in a table is

Sometimes we need to perform a large-scale data test and insert a large amount of data into the database. There are three points to consider: [Protect existing data] This has two purposes: 1. We only want to test the inserted

I said big data processing refers to the need to search the data at the same time, there are high concurrent additions and deletions to modify the operation. Remember before in XX to do power, millions of data, then a search query can let you wait for you minutes. Now I want to discuss the large amount of

Packageinterview_10_10;Importorg.junit.Test; Public classT1 {/*** If the system is going to use a very large integer (over a long length range), you should design a data structure to store this very large number and design an algorithm for large integer addition operations. */@Test Public voidtest1 () {String number1=

Unexpectedly large volume import data SqlBulkCopy class, mysql large volume import data Because we need to perform a small number attribution query function, because the SqlDataAdapter class is used to import external telephone attribution data (text files). There is not muc

In many cases you want the things on the Internet, for example, now I want to get the map poi point of Mars coordinates, random search to find this site: http://www.poi86.com There are various coordinates of the POI point of the map of the country. So,problem solved! Hey, wait, this data is all online, how to use AH. Rest assured. Learned the reptile, saw what climbed what, invincible. #coding =utf-8 Import urllib2 poi_file=open ("Poi.txt", "a") for

Solve the problem that the amount of data transmitted by WCF is too large, and the amount of data transmitted by wcf is too large. I wrote a WCF interface today and passed the test. When I call it with someone else, the remote server returns an error: (413) Request Entity Too Larg