Instr() Equivalent in SQL Server
While delving into the wonderful (*ahem) world of SQL server, I was attempting to parse through some text fields and needed to find an alternative to the Oracle instr() function.
The syntax for the INSTR Oracle function is:
instr( string1, string2 [, start_position [, nth_appearance ] ] )
string1 is the string to search.
string2 is the substring to search for in string1.
start_position is the position in string1 where the search will start. This argument is optional. If omitted, it defaults to 1. The first position in the string is 1. If the start_position is negative, the function counts back start_position number of characters from the end of string1 and then searches towards the beginning of string1.
nth_appearance is the nth appearance of string2. This is optional. If omitted, it defaults to 1.
The syntax for CHARINDEX in T-SQL is
CHARINDEX ( expression1 ,expression2 [ , start_location ] )
expression1 Is a character expression that contains the sequence to be found. expression1 is limited to 8000 characters.
expression2 Is a character expression to be searched.
start_location Is an integer or bigint expression at which the search starts. If start_location is not specified, is a negative number, or is 0, the search starts at the beginning of expression2.
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