Functions in Oracle are similar to operators in that they operate data items and return result. Functions in Oracle differ from operators in the arrangement of their parameters. This arrangement enables them to operate on zero, one, two or more parameters:

Name_Of_Function ( Parameter1[, Parameter2[, Parameter3[, ...]]] )

Functions in Oracle without any parameters are similar to a pseudocolumn. However, a pseudocolumn typically returns a different value for each row in the result set, whereas a function without any parameters typically returns the same value for each row.

Oracle has tons of built-in functions available. We can group these built-in Functions in Oracle by two categories:

A) Oracle SQL Functions

B) Oracle PL/SQL Functions

Oracle also allows you to define your own function and make it a part of your own SQL dialect. This kind function is called:

C) Oracle User-Defined Functions

Related Topics:

Functions in Oracle

Oracle Functions

Oracle Functions are similar to operators in that they manipulate data items and return result. Oracle Functions differ from operators in the format of their arguments. This format enables them to operate on zero, one, two or more arguments:

Function_Name ( Argument1[, Argument2[, Argument3[, ...]]] )

An Oracle Function without any arguments is similar to a pseudocolumn. However, a pseudocolumn typically returns a different value for each row in the result set, whereas a function without any arguments typically returns the same value for each row.

Oracle has tons of built-in functions available. We can group these built-in Oracle Functions by two categories:

A) Oracle SQL Functions

B) Oracle PL/SQL Functions

Oracle also allows you to define your own function and make it a part of your own SQL language. This kind function is called:

C) Oracle User-Defined Functions

Related Topics:

Oracle Functions

Functions in Oracle

Android TextView Width property makes the TextView be exactly the parametric pixels wide. It should be done the same thing by mention this size  in the LayoutParams. We can set Android TextView Width property in the following two ways mentioned bellow:

Set Android TextView Width in XML Editor:

<TextView
android:id="@+id/exampleTextView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
android:width="100dp" />

Set Android TextView Width in Java Code:

super.onCreate(savedInstanceState);
setContentView(R.layout.main);

TextView exampleTextView = (TextView)findViewById(R.id.exampleTextView);
exampleTextView.setWidth(100);

exampleTextView.setText("Hello Android - from Rahinur.com");

Android TextView Width XML Attribute:
android:width

Android TextView Width method:
setWidth(int width)

Please Note:

I have test this attribute(Android TextView Width) on Android SDK Version 15

Syntax of Oracle SUBSTR function:

SUBSTR(string, position [, length ])

Parameter Description of Oracle SUBSTR Function:

Required parameter string can be any of the datatypes CHAR, VARCHAR2, NCHAR, NVARCHAR2, CLOB or NCLOB.

Required parameter position must be of datatype NUMBER or any datatype that can be implicitly converted to NUMBER.

Optional parameter length must be of datatype NUMBER or any datatype that can be implicitly converted to number.

Floating-point numbers passed as parameters value to Oracle SUBSTR function are implicitely converted to integers.

If position is 0 then it is treated as 1.

If position is positive the Oracle counts from the beginning of string to find the first character otherwise counts backword from the end of the character.
Return Value of Oracle SUBSTR Function:

Return value of Oracle SUBSTR Function is char datatype.

If length parameter is omitted then Oracle returns all characters to the end of string.

If length parameter is less than 1 then Oracle returns null.

Example of Oracle SUBSTR Function:

SQL> SELECT SUBSTR('Apple introduce iPad', 1, 5)
2 FROM DUAL;

SQL> SELECT SUBSTR('Apple introduce iPad', 1)
2 FROM DUAL;

SUBSTR('APPLEINTRODU
--------------------
Apple introduce iPad

SQL> SELECT SUBSTR('Apple introduce iPad', 1, -1)
2 FROM DUAL;

S
-

SQL> SELECT SUBSTR('Apple introduce iPad', 1.12F, 5) SUBSTRING
2 FROM DUAL;

SUBST
-----
Apple

SQL> SELECT SUBSTR('Apple introduce iPad', 1.12F, 5.99) SUBSTRING
2 FROM DUAL;

SUBST
-----
Apple

SQL> SELECT SUBSTR('Apple introduce iPad', 1.12F, 7.99) SUBSTRING
2 FROM DUAL;

SUBSTRI
-------
Apple i

Internet browsing in android emulator required no configuration if your host operating system is out of proxy. But if you are behind the proxy you must set android emulator proxy settings properly. An incorrect configuration hampers your internet browsing.

There are many ways to setup android emulator proxy settings. Here I am going to mention some of the easiest ways:

Android Emulator Proxy Settings - Edit Access Point

Manual Configuration:

01. Go to Home Screen

02. Click on Menu

03. Click on Settings

04. In Wireless & Networks category, click More…

05. Click Mobile Networks

06. Click Access Point Names

07. Click TelKila

08. Enter Proxy and Port

09. Enter Username and Password if required

From Command Line:

01. Run the command console by Start >> Run >>Type cmd>> Press Enter

02. Navigate to tools folder of android SDK installation. In my case it is D:\android-development\android-sdk-windows\tools

03. Run the command after customize for yourself. “emulator -avd {avd-name| in my case DroidX} -http-proxy {http-proxy address:port|in my case 172.168.250.7:8080}”

04. In my case the full command was: “emulator -avd DroidX -http-proxy 172.168.250.7:8080”

Your proxy was set successfully. Just open browser, pour an URL to it and continue browsing.

Please Note: I have used Android Emulator 4.0.3 to test this android emulator proxy settings process.