SUBSTR returns a portion of char, beginning at character @StartPos, @Length characters long. If @StartPos is 0, it is treated as 1. If @StartPos is positive, Oracle counts from the beginning of char to find the first character. If @StartPos is negative, Oracle counts backwards from the end of char.
INSTR searches string for substring. --> position is an integer indicating the character of string where SQL Server begins the search. -->If position is negative, SQL Server counts and searches backward from the end of string. occurrence is an integer indicating which occurrence of string SQL Server should search for. The value of occurrence must […]