Returns a string of characters from the middle of a text string, given a starting position and length.
MID(<text>, <start_num>, <num_chars>)
|text||The text string from which you want to extract the characters, or a column that contains text.|
|start_num||The position of the first character you want to extract. Positions start at 1.|
|num_chars||The number of characters to return.|
Property Value/Return value
A string of text of the specified length.
Whereas Microsoft Excel has different functions for working with single-byte and double-byte characters languages, DAX uses Unicode and stores all characters with the same length.
The following examples return the same results, the first 5 letters of the column, [ResellerName]. The first example uses the fully qualified name of the column and specifies the starting point; the second example omits the table name and the parameter, num_chars.
The results are the same if you use the following formula: