What is live lock, deadlock and what is Lock escalation?

2506

How to solve -805 error i.e. Bind issue. There are two conditions- 1) If you have access to the database table 2) If you don't have access to the table

2703

I have written the code as below. here problem is that dt remain null. how to solve thst please tell me. public partial class Form1 : Form { private DataTable DTable; private DataRow drow; public Form1() { InitializeComponent(); } private OleDbConnection getConnection() { OleDbConnection con=new OleDbConnection (@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Documents and Settings\Administrator\My Documents\Visual Studio 2008\Projects\winApp for Student\winApp for Student\App_Data\SchooMgnSystem.mdb;Persist Security Info=True"); return con; } private void button1_Click(object sender, EventArgs e) { InsertData(); } private void InsertData() { if (DTable==null) { DTable = new DataTable(); DTable.Columns.Add("StudID", typeof(string)); DTable.Columns.Add("StudName", typeof (string)); DTable.Columns.Add("Address", typeof(string)); drow = DTable.NewRow(); drow[0] = txtStudID.Text; drow[1] = txtSTudName.Text; drow[2] = txtAddress.Text; DTable.Rows.Add(drow); grdStudent.DataSource = DTable; } else { drow = DTable.NewRow(); drow[0] = txtStudID.Text; drow[1] = txtSTudName.Text; drow[2] = txtAddress.Text; DTable.Rows.Add(drow); grdStudent.DataSource = DTable; } } private void button2_Click(object sender, EventArgs e) { string cmdstr; OleDbCommand cmd; OleDbConnection con = getConnection(); foreach (DataRow Drow in DTable.Rows) { cmdstr = "Insert into Student values('" + drow[0].ToString() + "','" + drow[1].ToString() + "','"+drow [2].ToString()+"')"; cmd = new OleDbCommand(cmdstr,con); try { con.Open(); cmd.ExecuteNonQuery(); } catch (Exception ex) { MessageBox.Show(ex.Message); } finally { con.Close(); } } }

2722

why we are using shift key in unix shell script

3243

write a database figure to implement the master detained relationship.

3026

What is the use of NOLOCK locking hint?

1837

if the lengths of two wires are same and the area of cross sections is 4:7 then what will be the ratio of current passing through these wires

2764

What is the meaning of lock escalation and why/how to stop this?

2718

java.sql.SQLException:Invalid state, the statement object is closed Hai all i got this error when i am multiple times referesh web page

6725

RMAN-05017: no copy of datafile number found to recover

2476

IMP-00064: Definition of LOB was truncated by export

6475

IMP-00060: Warning: Skipping table "string"."string" because object type "string"."string" does not exist or has different identifier

3234

IMG-02003: 2FF03 - incorrect color histogram feature specification

1777

I entered the data in SQL toad version 9.0.1 in English and Arabic language but when i do the query i get the data in Arabic language with (??? question mark) ,please your support.

1710

invalid quantity specification negative quantity are not allowed for this item please check this item definition quantity

3448