get random data from database and one time

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SQL-Server-2008R2

Hello,

Suppose we have a set of data with 5000 records and we need to write a query that helps us every time we are required to fetch 50 Random rows from that table and tat only one time get question.

Thanks & Regards,

Posted 2-Dec-14 21:39pm

Pratham4950

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Praveen Kumar Upadhyay 3-Dec-14 3:48am

Means the records which are picked should not get picked next time? If yes then how you are gonna remember picked records.

Pratham4950 3-Dec-14 4:48am

i got the ides, by update that picked record on runtime. and the code is

con.Open();
string strCmd = "SELECT top 5 * FROM quesheet where status = 0 ORDER BY NEWID() ";
SqlCommand cmd = new SqlCommand(strCmd, con);
SqlDataAdapter da = new SqlDataAdapter(strCmd, con);
DataTable dt = new DataTable();
da.Fill(dt);
foreach (DataRow row in dt.Rows)
{
conobj.con_open();
conobj.update_que("update quesheet set status ='1' where id = '"+ row.Field<int>(0) +"' ");
}
cmd.ExecuteReader();
dataGridView1.DataSource = dt;
con.Close();

BillWoodruff 3-Dec-14 5:36am

Is it correct that you wish to get a certain number of Rows each time, and each time have the set of Rows be Rows that have not been accessed before ?

If that's the case, let me know, I have some ideas and code for that case.

2 solutions

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Manas Bhardwaj · Accepted Answer · 2014-12-02T21:47:00

Solution 1

Something like this:

SQL

select top 5000 * from TABLENAME order by newid()

Posted 2-Dec-14 21:47pm

Manas Bhardwaj

Er. Dinesh Sharma · Accepted Answer · 2014-12-02T21:50:00

Solution 2

Hi
Try this

SQL

select top 50 * from  tbl order by NEWID()

Posted 2-Dec-14 21:50pm

Er. Dinesh Sharma