Help with adding columns

Hello,

I'm a very new user to power bi (about 2 weeks) and am running into some issues with my first report. I have 3 tables that all calculate a pass / fail column if certain conditions are met. (see simplified example)

I want to have a main reporting page with a transposed table containing the pass fail metrics along with the percentages like this

I've tried building a new table using SelectColumns/Add Columns, but it keeps giving me error like
"A single value for column 'Pass_Fail" cannot be determined . This can happen when a measure formula refers to a column that contains many values without specifying an aggregation such as min, max, count or sum to get a single result"

I'm fairly certain I'm using the wrong approach to get the data together in one place. Can anyone help? Would converting pass fail to binary be the correct approach? If so, how would I approach the <Null> values?

Need Help

v-yanjiang-msft

3 years ago

Hi mmar141 ,

If you mean the data type in Table1, Table2 and Table3 is Date, but in the new created table is text, here's my solution.

1.Delete the relationships betwen the four tables.

2.Modify the measure to:

Measure =
SWITCH (
    MAX ( 'Table'[TableName] ),
    "Table1",
        IF (
            MAX ( 'Date'[Date] ) = "%",
            DIVIDE (
                COUNTROWS ( FILTER ( ALL ( 'Table1' ), 'Table1'[Calculated Pass/Fail] = "P" ) ),
                COUNTROWS (
                    FILTER ( ALL ( 'Table1' ), 'Table1'[Calculated Pass/Fail] <> BLANK () )
                )
            ),
            MAXX (
                FILTER ( 'Table1', 'Table1'[Date] = CONVERT ( MAX ( 'Date'[Date] ), DATETIME ) ),
                'Table1'[Calculated Pass/Fail]
            )
        ),
    "Table2",
        IF (
            MAX ( 'Date'[Date] ) = "%",
            DIVIDE (
                COUNTROWS ( FILTER ( ALL ( 'Table2' ), 'Table2'[Calculated Pass/Fail] = "P" ) ),
                COUNTROWS (
                    FILTER ( ALL ( 'Table2' ), 'Table2'[Calculated Pass/Fail] <> BLANK () )
                )
            ),
            MAXX (
                FILTER ( 'Table2', 'Table2'[Date] = CONVERT ( MAX ( 'Date'[Date] ), DATETIME ) ),
                'Table2'[Calculated Pass/Fail]
            )
        ),
    "Table3",
        IF (
            MAX ( 'Date'[Date] ) = "%",
            DIVIDE (
                COUNTROWS ( FILTER ( ALL ( 'Table3' ), 'Table3'[Calculated Pass/Fail] = "P" ) ),
                COUNTROWS (
                    FILTER ( ALL ( 'Table3' ), 'Table3'[Calculated Pass/Fail] <> BLANK () )
                )
            ),
            MAXX (
                FILTER ( 'Table3', 'Table3'[Date] = CONVERT ( MAX ( 'Date'[Date] ), DATETIME ) ),
                'Table3'[Calculated Pass/Fail]
            )
        )
)

Get the correct result:

I attach my sample below for your reference.

Best regards,

Community Support Team_yanjiang

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

Help with adding columns.pbix41 KB

8 Replies

v-yanjiang-msft
Community Support
3 years ago
Hi mmar141 ,

According to your description, here's my solution.

1.Create two tables.

Sort Date column by Index column, then make relationship between Date table and other tables with Date column.

2.Create a measure:

Measure = SWITCH ( MAX ( 'Table'[TableName] ), "Table1", IF ( MAX ( 'Date'[Date] ) = "%", DIVIDE ( COUNTROWS ( FILTER ( ALL ( 'Table1' ), 'Table1'[Calculated Pass/Fail] = "P" ) ), COUNTROWS ( FILTER ( ALL ( 'Table1' ), 'Table1'[Calculated Pass/Fail] <> BLANK () ) ) ), MAX ( 'Table1'[Calculated Pass/Fail] ) ), "Table2", IF ( MAX ( 'Date'[Date] ) = "%", DIVIDE ( COUNTROWS ( FILTER ( ALL ( 'Table2' ), 'Table2'[Calculated Pass/Fail] = "P" ) ), COUNTROWS ( FILTER ( ALL ( 'Table2' ), 'Table2'[Calculated Pass/Fail] <> BLANK () ) ) ), MAX ( 'Table2'[Calculated Pass/Fail] ) ), "Table3", IF ( MAX ( 'Date'[Date] ) = "%", DIVIDE ( COUNTROWS ( FILTER ( ALL ( 'Table3' ), 'Table3'[Calculated Pass/Fail] = "P" ) ), COUNTROWS ( FILTER ( ALL ( 'Table3' ), 'Table3'[Calculated Pass/Fail] <> BLANK () ) ) ), MAX ( 'Table3'[Calculated Pass/Fail] ) ) )

In a matrix, put TableName in Rows, Date in Columns and measure in Values, get the correct result:

I attach my sample below for your reference.

Best regards,

Community Support Team_yanjiang

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Help with adding columns.pbix42 KB
- mmar141
  Frequent Visitor
  3 years ago
  Wow. This is exactly what I need. BTW, can I use this with a slicer? So if I use my slice by date, would this this increase or decrease the amount of columns?
  
  Also, i had used a Date Table using Bravo for PowerBI, so I'm having some difficulty adding an Index. What is the best way to add an index if the date isnt shown in the power query view?
- mmar141
  Frequent Visitor
  3 years ago
  I'm close, but when I add the measure it just displays P?
  - v-yanjiang-msft
    Community Support
    3 years ago
    Hi mmar141 ,
    
    Please check if the Date columns are all in the same data type. I guess some is text and others are date.
    
    Best regards,
    
    Community Support Team_yanjiang
    
    If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.