Access InStr() function to SQL Server equivalent

What is the SQL Server equivalent to Access InStr() function?

TargetField: String expression being searched

SearchValue: String expression being sought

StartPosition: Starting position for each search (optional)

Access SQL

• InStr(TargetField, SearchValue)
• InStr(StartPosition, TargetField, SearchValue)

SQL Server

• CHARINDEX(SearchValue, TargetField)
• CHARINDEX(SearchValue, TargetField, StartPosition )