charindex function
Applies to: 
Databricks SQL Databricks Runtime
Returns the position of the first occurrence of substr in str after position pos. This function is a synonym for locate function.
Syntax
charindex(substr, str [, pos])
Arguments
substr: A STRING expression.str: A STRING expression.pos: An INTEGER expression.
Returns
An INTEGER.
The specified pos and return value are 1-based.
If pos is omitted, substr is searched from the beginning of str.
If pos is less than 1, the result is 0.
Examples
> SELECT charindex('bar', 'abcbarbar');
4
> SELECT charindex('bar', 'abcbarbar', 5);
7