How does the MID function (DAX) work?
MID function returns a string of characters, given the starting position and length, from the middle of a text string.
MID Formula Syntax
<text>, <start_num>, <num_chars>
How do you use the MID function?
A text string with the specified length.
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Considerations when using the MID function
Whereas Microsoft Excel has various functions for dealing with languages of single byte and double byte characters, DAX uses Unicode and stores all characters of the same length.
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Formula examples using the MID function
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.
= MID (
= MID (
The results are the same if you use the following formula:
= LEFT (
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