PL/SQL Date function - to_date()

In Oracle/PLSQL, the to_date function converts a string to a date.

The syntax for the to_date function is:

to_date( string1, [ format_mask ], [ nls_language ] )

string1 is the string that will be converted to a date.

format_mask is optional. This is the format that will be used to convert string1 to a date.

nls_language is optional. This is the nls language used to convert string1 to a date.

The following is a list of options for the format_mask parameter. These parameters can be used in many combinations.

Parameter	Explanation
YEAR	Year, spelled out
YYYY	4-digit year
YYY YY Y	Last 3, 2, or 1 digit(s) of year.
IYY IY I	Last 3, 2, or 1 digit(s) of ISO year.
IYYY	4-digit year based on the ISO standard
RRRR	Accepts a 2-digit year and returns a 4-digit year. A value between 0-49 will return a 20xx year. A value between 50-99 will return a 19xx year.
Q	Quarter of year (1, 2, 3, 4; JAN-MAR = 1).
MM	Month (01-12; JAN = 01).
MON	Abbreviated name of month.
MONTH	Name of month, padded with blanks to length of 9 characters.
RM	Roman numeral month (I-XII; JAN = I).
WW	Week of year (1-53) where week 1 starts on the first day of the year and continues to the seventh day of the year.
W	Week of month (1-5) where week 1 starts on the first day of the month and ends on the seventh.
IW	Week of year (1-52 or 1-53) based on the ISO standard.
D	Day of week (1-7).
DAY	Name of day.
DD	Day of month (1-31).
DDD	Day of year (1-366).
DY	Abbreviated name of day.
J	Julian day; the number of days since January 1, 4712 BC.
HH	Hour of day (1-12).
HH12	Hour of day (1-12).
HH24	Hour of day (0-23).
MI	Minute (0-59).
SS	Second (0-59).
SSSSS	Seconds past midnight (0-86399).
FF	Fractional seconds. Use a value from 1 to 9 after FF to indicate the number of digits in the fractional seconds. For example, 'FF4'.
AM, A.M., PM, or P.M.	Meridian indicator
AD or A.D	AD indicator
BC or B.C.	BC indicator
TZD	Daylight savings information. For example, 'PST'
TZH	Time zone hour.
TZM	Time zone minute.
TZR	Time zone region.

Applies To:

Oracle 8i, Oracle 9i, Oracle 10g, Oracle 11g


For example:

to_date('2003/07/09', 'yyyy/mm/dd') would return a date value of July 9, 2003.
to_date('070903', 'MMDDYY') would return a date value of July 9, 2003.
to_date('20020315', 'yyyymmdd') would return a date value of Mar 15, 2002.

Disabling script debugging in VS 2008 and IE 8

Visual studio 2008 creates a problem when it starts debugging the javascript. It actually generates a number of files by name anonymous code which leads to a slow debugging in development environment.

In IE 7 you can disable the script debugging directly from IE tools. But in IE 8 it doesn't work, there are some workarounds given by microsoft as I thought it is good to paste here.


Work around:

1. This work around requires the Silverlight 2 Tools for Visual Studio 2008 SP1 to be installed. So if you don't have these tools installed, you can download them from Microsoft (Click Here). If this is not an option for you, there is some alternative work arounds at the bottom of this blog post.
2. Right click on your project and open up project properties
3. Go to the 'Start Options' sheet, and click the 'Silverlight' button at the bottom of the screen. Because the debugger cannot debug both Silverlight code and Script code at the same time, this will disable Script debugging and therefore avoid the problem.

Alternative work around – disable all script debugging:

* Open a new command prompt (start->run, cmd.exe). If you are on a 64-bit computer this needs to be a 32-bit prompt (start->run, c:\windows\syswow64\cmd.exe)
* reg add HKLM\SOFTWARE\Microsoft\VisualStudio\9.0\AD7Metrics\Engine\{F200A7E7-DEA5-11D0-B854-00A0244A1DE2} /v ProgramProvider /d {4FF9DEF4-8922-4D02-9379-3FFA64D1D639} /f

If you are using Visual Web Developer Express, replace 'VisualStudio' with 'VWDExpress':

* reg add HKLM\SOFTWARE\Microsoft\VWDExpress\9.0\AD7Metrics\Engine\{F200A7E7-DEA5-11D0-B854-00A0244A1DE2} /v ProgramProvider /d {4FF9DEF4-8922-4D02-9379-3FFA64D1D639} /f

If you want to restore your computer so that you can debug scripts again:

* reg add HKLM\SOFTWARE\Microsoft\VisualStudio\9.0\AD7Metrics\Engine\{F200A7E7-DEA5-11D0-B854-00A0244A1DE2} /v ProgramProvider /d {170EC3FC-4E80-40AB-A85A-55900C7C70DE} /f



Work around for performance problems caused by 'anonymous code' nodes:

Some sites run into problems being debugged due to numerous "anonymous code" nodes in solution explorer. For these sites, instead of disabling script debugging completely, it's possible to disable just the 'anonymous code' nodes. This requires Visual Studio 2008 SP1. To do so:

* reg add HKCU\Software\Microsoft\VisualStudio\9.0\Debugger /v HideAnonymousScriptCodeNodes /t REG_DWORD /d 1 /f

Hope this helps!!

-Azhar

How to get current week start date from current date in .NET

Following code will give you the week start date on passing any date.


private DateTime getWeekStartDate(DateTime weekDate)
{
DateTime currentWeekStartDate = weekDate;

string StartDay = "1" // You can set any day as start day of the week
// 1 for monday, 2 for tuesday and so on

while (!StartDay.ToLower().Equals(currentWeekStartDate.DayOfWeek.ToString().ToLower()))
{
currentWeekStartDate = currentWeekStartDate.Subtract(new TimeSpan(1, 0, 0, 0));
}
return currentWeekStartDate
}

Hope this helps, thanks

How to catch a drop down event from a datalist and have a cascading effect.

Many a times in projects we have come across a need to get a drop down event from a datalist for a particular row, here is the code how you can achieve it.

1. In your data list set the selected index change event of the drop down and set the AutpPostBack Property to true.

2. Write the code as below

protected void ddlYourDropDown_SelectedIndexChanged(object sender, EventArgs e)
{

DropDownList ddlYourDropDown= (DropDownList)sender;


//So here you got the dropdown from the datalist row
// do whatever you want

}

Once you get the particular drop down from the datalist you can do whatever you want with its value, for example, if you need to have a cascading effect of drop downs within your data list, then you can acieve it very easily as below.

protected void ddlParentDropDown_SelectedIndexChanged(object sender, EventArgs e)
{

DropDownList ddlParentDropDown_= (DropDownList)sender;
DataListItem dataListItem = (DataListItem)ddl.Parent; // get the datalistitem you select to get the drop down to which you want to populate based on the parent drop down

DropDownList ddlChildDropDown= (DropDownList)dataListItem.FindControl("ddlChildDropDown");
ddlChildDropDown.Items.Clear();
if (ddlParentDropDown!= null && ddlChildDropDown!= null)
{
if (ddlParentDropDown.SelectedIndex != 0)
{
//populate Child drop down with parent drop down's (ddlParentDropDown) value

}
}

Import Excel into MySql database....!!!!

Its easy and quick, thought to share it with you all....

Convert Excel into csv file with Save As.
Open the csv file in notepad/wordpad, see the delimeter (should be a comma).
Write the following command in the query browser
LOAD DATA LOCAL INFILE 'D:\\converted_csv.csv' INTO TABLE database.table FIELDS TERMINATED BY ',' ENCLOSED BY ‘”‘ LINES TERMINATED BY '\r\n' (table.field1, table.field2,table.field3...);

If you get any error, probably the single and double qoutes are not correct, sometimes the editor changes the quotes ASCII, better delete the quotes and write again...

TERMINATED BY is the delimeter you use "comma in our case"
LINES TERMINATED BY – new line character, if you do not use \r, the query will insert a new line character in the database.

Hope this helps....

Thanks
Sayed Azharuddin

ORA-06502: PL/SQL: numeric or value error: character string buffer too small

This is a common error faced by many of us and some times it takes hours to find what went wrong.

The reason it happens is

1) The size of the Varchar2 parameter, the maximum allowed size of the Varchar2 datatype is 4000, if the input string exceeds that number you will get this error.

2) Or you have defind your parameter of size 10 and trying to write 12 characters.

Workaround - For first reason, there is no way out you can use the Varchar2 datatype, better use CLOB objects.

For second, try to increase the size of the parameter.

Hope this helps.

Thanks
-Azhar

PL SQL query to create a search query.

Hi,

Often we search for a particular value in the user tables of a database, for each table we have to change the query, if not the column name, at least the table name. The good new is, we can avoid doing that. We can write a query which will create a search query as its result records each for a user table in the database.

select 'select * from '||table_name||'
where upper (to_char(&in_column)) = upper (to_char('||'''&in_value'''||'));'
from user_tab_columns
where column_name = upper ('&in_column');

Run tha above query in PL SQL and see the magic.

Hope that helps you.

Thanks..