Web Reference: You use character-manipulation functions to manipulate character strings. The types of character-manipulation functions are CONCAT , SUBSTR , INSTR , LPAD , RPAD , TRIM , and REPLACE . This tutorial provides you all Oracle string functions with examples that help you manipulate character strings more effectively. Tests whether a given character occurs in the given string or not. If the character occurs in the string then returns the first position of its occurrence otherwise returns 0.
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