JDev

Oracle Equivalent for “Use Database” Command

Administrator — Wed, 23 Sep 2009 18:11:56 +0000

ALTER SESSION SET CURRENT_SCHEMA = schema

Substring in Sql Server

Administrator — Thu, 09 Jul 2009 17:06:24 +0000

Suppose values in your fields contain a period, and you want to return all characters that come before it. This is how you do in SQL Server:

select substring(column1, 1, charindex(’.', column1)-1 )
from myTable

Capitalize First Letter in JavaScript

Administrator — Wed, 10 Jun 2009 13:47:10 +0000

Here is a function based on excellent code from Philip M at http://www.codingforums.com/showthread.php?t=168661 that capitalizes the first letter of each word:

function caps(str){
return str.toLowerCase().replace(/\b[a-z]/g,function(w){return w.toUpperCase()});
}

Check if Column is Empy in SQL Server

Administrator — Wed, 15 Apr 2009 12:48:58 +0000

WHERE datalength(ColumnName)> 0 shows non-empty fields

Replace single quotes in transact-sql

Administrator — Mon, 09 Mar 2009 21:23:34 +0000

If you have single quotes in your text values, and you need to insert them in a SQL Server database the recommended approach is to use parameterized stored procedures. They will handle single quotes seamlessly.

However, there may be cases when you may need to construct an insert statement without resorting to parameters. In such cases, to handle text that contains single quotes you may have to use the Transact-SQL Replace function:

REPLACE ( string_expression , string_pattern , string_replacement )

An example that escapes single quotes by adding another single quote before it:

Declare @temp as varchar(64)
Set @temp= (select … from …)
Set @temp = Replace(@temp, ‘”’,””'’)

In other words, you need 4 single quotes as a second argument, and 6 single quotes as a second argument to escape single quotes.

Export Unicode From GridView to Excel

Administrator — Thu, 12 Feb 2009 20:18:21 +0000

This solution was found on http://razvan.cosma.name/weblog/index.php?entry=entry090116-161656

private void ExportToExcel(string strFileName, GridView gv)
        {
            Response.ClearContent();
            Response.ContentType = "application/excel";
            Response.AddHeader("content-disposition", "attachment; filename=" + strFileName);
            Response.Charset = "";
            Response.ContentEncoding = System.Text.Encoding.Unicode;
            Response.BinaryWrite(System.Text.Encoding.Unicode.GetPreamble());
            this.EnableViewState = false;
            System.IO.StringWriter sw = new System.IO.StringWriter();
            HtmlTextWriter htw = new HtmlTextWriter(sw);
            gv.RenderControl(htw);
            Response.Write(sw.ToString());
            HttpContext.Current.ApplicationInstance.CompleteRequest();
        }

Some Regular Expressions for Java

Administrator — Wed, 11 Feb 2009 04:01:43 +0000

If you need to find text lines that start with an alphanumeric characters:

String reg ="\\w+";

In other words, an alphanumeric character that gets repeated 1 or more times.

To find text lines that start with a whitespace and contain other characters after it, use the following regex:

String reg = "\\s.+";

That is, first find a whitespace, then any character repeated 1 or more times.

Select Individual Columns From Table Information Schema

Administrator — Thu, 29 Jan 2009 19:50:16 +0000

The ‘desc’ command to get a list of table fields that is common in Oracle and MySql will fail in SQL Server. It turns out it is not sql-standard compliant. Instead, SQL Server uses the following command:

sp_columns myTableName

This will display detailed information about table structure.

If you need just individual columns, use the following command:

select column_name, data_type, character_maximum_length, *
from information_schema.columns
where table_name = ‘myTableName’

order by ordinal_position

Upload Excel File Without Saving It

Administrator — Tue, 06 Jan 2009 21:31:11 +0000

Here is a discussion of the captioned issue with a solution posted at the end of the page, pointing to a third-party solution.

Split a string into words in Java

Administrator — Thu, 13 Nov 2008 17:54:20 +0000

Use a Pattern class from the java.util.regex package to split a long string into separate words in Java.

A Pattern is a compiled representation of a regular expression.

String str = "a very long string possibly with line breaks , tab delimiters etc";

Pattern p = Pattern.compile("[,\\s]+");
String[] arr = p.split(str);