Monday, April 19, 2010

Some useful functions


In Oracle/PLSQL, the initcap function sets the first character in each word to uppercase and the rest to lowercase.

The syntax for the initcap function is:initcap( string1 )

string1 is the string argument whose first character in each word will be converted to uppercase and all remaining characters converted to lowercase.

Applies To:

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

For example:

initcap('tech on the net'); would return 'Tech On The Net'

initcap('GEORGE BURNS'); would return 'George Burns'

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In Oracle/PLSQL, the decode function has the functionality of an IF-THEN-ELSE statement.

The syntax for the decode function is:

decode( expression , search , result [, search , result]... [, default] )

expression is the value to compare.

search is the value that is compared against expression.

result is the value returned, if expression is equal to search.

default is optional. If no matches are found, the decode will return default. If default is omitted, then the decode statement will return null (if no matches are found).


 

Applies To:

Oracle 9i, Oracle 10g, Oracle 11g


 

For example:

You could use the decode function in an SQL statement as follows:


 

SELECT supplier_name,

decode(supplier_id, 10000, 'IBM',

10001, 'Microsoft',

10002, 'Hewlett Packard',

'Gateway') result

FROM suppliers;


 

The above decode statement is equivalent to the following IF-THEN-ELSE statement:

IF supplier_id = 10000 THEN

result := 'IBM';

ELSIF supplier_id = 10001 THEN

result := 'Microsoft';

ELSIF supplier_id = 10002 THEN

result := 'Hewlett Packard';

ELSE

result := 'Gateway';

END IF;

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Check for file existence:

If Not (FileExists(&Str_Filepath, %FilePath_Absolute)) Then

MessageBox(0, "", 0, 0, " *** Invalid File Path/ No write access -- Check the File Path <" | &Str_Filepath | ">");

Exit (1);

End-If;


 

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