On Universalthread.com, I offer many T-SQL user-defined string functions that you can download for free. Versions are available for SQL Server 2005, SQL Server 2000, and SQL Server 7.0. Plus, versions are available for Oracle PL/SQL, Sybase Adaptive Server Anywhere (ASA), and DB2.

Here’s a list of the functions and what they do:

  • AT()—Returns the beginning numeric position of the nth occurrence of a character expression within another character expression, counting from the leftmost character.
  • RAT()—Returns the numeric position of the last (rightmost) occurrence of a character string within another character string.
  • OCCURS()—Returns the number of times a character expression occurs within another character expression, including overlaps.
  • OCCURS2()—Returns the number of times a character expression occurs within another character expression, excluding overlaps.
  • PADL()—Returns a string from an expression, padded with spaces or characters, to a specified length on the left side.
  • PADR()—Returns a string from an expression, padded with spaces or characters, to a specified length on the right side.
  • PADC()—Returns a string from an expression, padded with spaces or characters, to a specified length on both sides.
  • CHRTRAN()—Replaces each character in a character expression that matches a character in a second character expression with the corresponding character in a third character expression.
  • STRTRAN()—Searches a character expression for occurrences of a second character expression, then replaces each occurrence with a third character expression. (Unlike the built-in replace T-SQL function, STRTRAN has three additional parameters.)
  • STRFILTER()—Removes all characters from a string, except those specified.
  • GETWORDCOUNT()—Counts the words in a string.
  • GETWORDNUM()—Returns a specified word from a string.
  • GETALLWORDS()—Inserts the words from a string into a table.
  • PROPER()—Returns from a character expression a string capitalized as appropriate for proper names.
  • RCHARINDEX()—Is similar to the built-in charindex T-SQL function, but the search of which is on the right.
  • ARABTOROMAN()—Returns the character Roman number equivalent of a specified numeric expression (from 1 to 3999).
  • ROMANTOARAB()—Returns the number equivalent of a specified character Roman number expression (from I to MMMCMXCIX).

Note that my AT, PADL, PADR, CHRTRAN, and PROPER functions are similar to the Oracle PL/SQL INSTR, LPAD, RPAD, TRANSLATE, and INITCAP functions, respectively.

More than 7000 people have already downloaded the functions. I hope you will find them useful as well.

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