CHARINDEX function - Amazon Redshift
SyntaxArgumentsReturn typeExamples
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CHARINDEX function

Returns the location of the specified substring within a string.

See POSITION function and STRPOS function for similar functions.

Syntax

CHARINDEX( substring, string )

Arguments

substring

The substring to search for within the string.

string

The string or column to be searched.

Return type

INTEGER

The CHARINDEX function returns an INTEGER corresponding to the position of the substring (one-based, not zero-based). The position is based on the number of characters, not bytes, so that multi-byte characters are counted as single characters. CHARINDEX returns 0 if the substring is not found within the string.

Examples

To return the position of the string fish within the word dog, use the following example. 

SELECT CHARINDEX('fish', 'dog');

+-----------+
| charindex |
+-----------+
|         0 |
+-----------+

To return the position of the string fish within the word dogfish, use the following example. 

SELECT CHARINDEX('fish', 'dogfish');

+-----------+
| charindex |
+-----------+
|         4 |
+-----------+

The following example uses the SALES table from the TICKIT sample database. For more information, see Sample database.

To return the number of distinct sales transactions with a commission over 999.00 from the SALES table, use the following example. This command counts commissions greater than 999.00 by checking if the decimal is more than 4 places from the beginning of the commission value.

SELECT DISTINCT CHARINDEX('.', commission), COUNT (CHARINDEX('.', commission))
FROM sales 
WHERE CHARINDEX('.', commission) > 4 
GROUP BY CHARINDEX('.', commission)
ORDER BY 1,2;

+-----------+-------+
| charindex | count |
+-----------+-------+
|         5 |   629 |
+-----------+-------+