If statements between 2 tables , Power Query

[Wresen]

Hi and thanks for reading this.

i have looked around and i cant seem to find any answer for my problem
not sure how easy or hard this is , have only been able to get true /false check to work 🙂

i have two tables , Table1 and Table2 

i would like to create a new column in Table1 where i check the statements.
If Table1[ID] = Table2[ID] && Table1[Value] >= Tabel2[Check1] && Table1[Value] <= Table2[Check2] then Table2[Return]

also if error or not match at all it gives "Not found"

Someting like this:

Thanks so much for any help to point me in the right direction

[Omid_Motamedise · Accepted solution]

Use this formula

let
    T1=Table.FromColumns({{1..5},{10,11,12,13,22}},{"ID","Value"}),
    T2=Table.FromColumns({{1,2,3,4,2},{5,6,11,1,7},{10,10,22,14,12},{"Green","BLue","BRown","Yellow","Red"}},{"ID","Check 1","Check 2","Return"}),
    #"Added Custom" = Table.AddColumn(T1, "Custom", each try Table.SelectRows(T2, (x)=> x[ID]=_[ID] and x[Check 1]<=_[Value] and x[Check 2]>=_[Value])[Return]{0} otherwise "Not Found")
    in
    #"Added Custom"

For more descrition see this video:
https://www.youtube.com/watch?v=DHB2ejpEGxU

[Wresen]

Hi @Omid_Motamedise  and @Claude_Xu 
Thanks Both for the help here . Really appriciate it 🙂

[Omid_Motamedise]

You are welcome

[Wresen]

@Omid_Motamedise 
I see that this is not working when i have a Direct Query .Get an error that says that its not supported in DirectQ. 
Is it possible to do this in Direct Q ??
The Fact table is important and the Table1 is a Direct Q

/Thanks 

[Omid_Motamedise]

Check this code, (it results in recodr, but just let me know does it work in Direct Query)

let
    T1=Table.FromColumns({{1..5},{10,11,12,13,22}},{"ID","Value"}),
    T2=Table.FromColumns({{1,2,3,4,2},{5,6,11,1,7},{10,10,22,14,12},{"Green","BLue","BRown","Yellow","Red"}},{"ID","Check 1","Check 2","Return"}),
    #"Added Custom" = Table.First(Table.AddColumn(T1, "Custom", each Table.SelectRows(T2, (x)=> x[ID]=_[ID] and x[Check 1]<=_[Value] and x[Check 2]>=_[Value])) )
    in
    #"Added Custom"

[Wresen]

Hi @Omid_Motamedise 

it gives me someting strange Record Tools lights up 🙂
But not the error as before 

[Omid_Motamedise]

Yes, it is not complete and need to add another part including Record.Field, but I am wondering until this step, does it align with the direct query?

[Wresen]

I get no errors, The table is not column Left to right , its Top to botton instead

[Omid_Motamedise]

So, now check the below codes and let me know which one does work on direct query.
S1:

let
    T1=Table.FromColumns({{1..5},{10,11,12,13,22}},{"ID","Value"}),
    T2=Table.FromColumns({{1,2,3,4,2},{5,6,11,1,7},{10,10,22,14,12},{"Green","BLue","BRown","Yellow","Red"}},{"ID","Check 1","Check 2","Return"}),
    #"Added Custom" = Table.AddColumn(T1, "Custom", each Table.First(Table.SelectRows(T2, (x)=> x[ID]=_[ID] and x[Check 1]<=_[Value] and x[Check 2]>=_[Value]))[Return]) 
    in
    #"Added Custom"

S2:

let
    T1=Table.FromColumns({{1..5},{10,11,12,13,22}},{"ID","Value"}),
    T2=Table.FromColumns({{1,2,3,4,2},{5,6,11,1,7},{10,10,22,14,12},{"Green","BLue","BRown","Yellow","Red"}},{"ID","Check 1","Check 2","Return"}),
    #"Added Custom" = Table.AddColumn(T1, "Custom", each Record.Field(Table.First(Table.SelectRows(T2, (x)=> x[ID]=_[ID] and x[Check 1]<=_[Value] and x[Check 2]>=_[Value])),"Return")) 
    in
    #"Added Custom"

S3:

let
    T1=Table.FromColumns({{1..5},{10,11,12,13,22}},{"ID","Value"}),
    T2=Table.FromColumns({{1,2,3,4,2},{5,6,11,1,7},{10,10,22,14,12},{"Green","BLue","BRown","Yellow","Red"}},{"ID","Check 1","Check 2","Return"}),
    #"Added Custom" = Table.AddColumn(T1, "Custom", each List.First(Table.Column(Table.SelectRows(T2, (x)=> x[ID]=_[ID] and x[Check 1]<=_[Value] and x[Check 2]>=_[Value]),"Return"))) 
    in
    #"Added Custom"

S4:

let
    T1=Table.FromColumns({{1..5},{10,11,12,13,22}},{"ID","Value"}),
    T2=Table.FromColumns({{1,2,3,4,2},{5,6,11,1,7},{10,10,22,14,12},{"Green","BLue","BRown","Yellow","Red"}},{"ID","Check 1","Check 2","Return"}),
    #"Added Custom" = Table.AddColumn(T1, "Custom", each Table.Column(Table.SelectRows(T2, (x)=> x[ID]=_[ID] and x[Check 1]<=_[Value] and x[Check 2]>=_[Value]),"Return"){0}) 
    in
    #"Added Custom"

[Wresen]

Hi @Omid_Motamedise 
First thx so much for helping me out there.
this is what i got :

S1 get Error in the custom and Not supported in DirectQ

S2 get Error in the custom and Not supported in DirectQ

S3 Get Null in Custom and Not supported in DirectQ

S4 Get Null in Custom and Not supported in DirectQ

/Thanks

[Claude_Xu]

Hi Wresen,

Please refer to below implementation

let
    Table1 = #table({"ID", "Value"}, {
        {1,10},
        {2,11},
        {3,12},
        {4,13},
        {5,22},
        {2,8}
    }),
    Table2 = #table({"id", "Check1", "Check2", "Return"},{
        {1,5,10,"Green"},
        {2,6,10,"Blue"},
        {3,11,22,"Brown"},
        {4,1,14,"Yellow"},
        {2,7,12,"Red"}
    }),
    #"Left Join Table" = Table.Join(Table1, "ID", Table2, "id", JoinKind.LeftOuter),
    #"Add Custom Column" = Table.AddColumn(#"Left Join Table", "Custom",
        each try if [Value] >= [Check1] and [Value] <= [Check2] then [Return]
                else "Not Found"
            otherwise "Not Found"
    ),
    Result = Table.Group(#"Add Custom Column", {"ID", "Value"},{
        {"Custom", each if Table.RowCount(_) = 1 then [Custom]{0}
                        else Text.Combine(List.RemoveItems([Custom], {"Not Found"}), ", ")}
    })
in
    Result

It seems you did not mention the logic of some edge cases. For example, if you have [ID=2, Value=8] in Table1, there will be two matching records in Table2. The above implementation simply joins two matching 'Return' string literals with a comma.