How to fix this?

I get an error: Unknown column 'a' in 'field list'. The values i have entered are: edit_name=a, edit_ip=b, edit_os=c, edit_ram=123, old_name=1(I have 4 records with that name). Here is my code, how to fix this issue?

Code :

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public static void EditInformation(String old_name, String edit_name, String edit_IP, String edit_OS, int edit_RAM, Connection conn, String url, String dbName, String driver, String userName, String password){		
			try {
				Class.forName(driver).newInstance();
				conn=DriverManager.getConnection(url+dbName, userName, password);
				try {
					Statement st = conn.createStatement();
					int val=st.executeUpdate("UPDATE server "+
							"SET name="+edit_name+",ip="+edit_IP+",os="+edit_OS+",ram="+edit_RAM+" "+
							"WHERE name="+old_name);
				}
				catch(SQLException s){
			        System.out.println("SQL statement is not executed!");
				}
			}
			catch (Exception e){
				e.printStackTrace();
				}
		}

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Quote:

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Originally Posted by noFear

I get an error: Unknown column 'a' in 'field list'. The values i have entered are: edit_name=a, edit_ip=b, edit_os=c, edit_ram=123, old_name=1(I have 4 records with that name). Here is my code, how to fix this issue?

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assuming that the edit_name column in the database table is defined as a char, then your assignment should be

edit_name='a'

and so on.

Try surrounding your entries with quotes:

Code java:

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int val=st.executeUpdate("UPDATE server "+
							"SET name=\""+edit_name+"\",ip=\""+edit_IP+"\",os=\""+edit_OS+"\",ram=\""+edit_RAM+"\" "+
							"WHERE name=\""+old_name + "\"");

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