Forum Discussion
How to replace one column value with another column value from another table?
Hello,
I have this scenario where I have to get the column value replaced from another table column.
For example:
Let us consider that Column that needs to be replaced from Table1 has 200 records and has no superscript symbols.
Column that replaces the value is from Table2 that has 150 records and has few values with superscript symbols.
Now I want Table1 column values that don't have the superscript symbols to be replaced by the values from Table2 column.
Below is a simple mock-up example of the table columns
| Table1.Col1 | Table2.Col3 | Expected result |
| ABC | ABC | ABC |
| DEF | null | DEF |
| GHI | GHI | GHI |
| JKL | JKL² | JKL² |
| MNO | null | MNO |
| PQR | PQR³ | PQR³ |
| STU | null | STU |
I do not want to hard-code the superscripts in the query as it may vary depending on the data.
Please guide me through on how to achieve the expected result to be modified in Table1.Col1 itself.
Thank you!
I'd recommend filtering Table2 for only rows with superscripts and adding a column to that filtered table that strips off the super script.
You can then merge this with Table1 on that custom column and expand Col3. Then replace Col1 with Col3 ?? Col1.
Remove Col3 if you like as a final step.
I've added these tables/queries to the file ray shared. See attached.
Note: There are many different ways to solve this problem. I recommend searching power query multiple replace online for additional ideas.
14 Replies
It looks like you can take [Table2.Col3] except where it's null otherwise [Table1.Col1].
Add a new custom column like
if [Table2.Col3] = null then [Table1.Col1] else [Table2.Col3]There's a nice coalsece operator that makes this simpler to write:
[Table2.Col3] ?? [Table1.Col]This one's tricky and it requires some steps but here's how I would address it. You need to create first a "flag" to identify which values have a symbol to avoid hardcoding each case. So you can:
1.Evaluate if a value contains a superscript. (Note: I recommend having the superscripts written in a Word or text file because you'll need to copy them. You can use the code as well from the file attached)
2. Then use this flag in a coditional statement within a Replace Value function:
(It might be funky but is the inverse of indicating that if you have a Flag replace the value, it works this way)
And there you go!
Feel free to look at my working file.
ray_aramburo, here's another way to do the first step in your approach that checks superscripts 0 through 9.
if List.Contains({"⁰","¹","²","³","⁴".."⁹"}, Text.End([Table2.Col3], 1)) then "Yes" else "No"Thanks for the tip! This is more efficient!
Hello,
Thank you.
Sorry but how should I handle it if there is a scenario where I merge the two columns? Because when I try to merge them together (by fullOuter Join) the scenario looks like below:Table1.Col1 ABC DEF GHI JKL MNO PQR Table2.Col3 ABC null GHI JKL² null PQR³ Table1.Col1 Table2.Col3 ABC ABC DEF null GHI GHI JKL null MNO null PQR null null JKL² null PQR³ The output I get when trying to replcae value is like below.
Table1.Col1 ABC DEF GHI JKL MNO PQR JKL² PQR³
It has the entries without the superscripted value as well. But the desired output is:Table1.Col1 ABC DEF GHI JKL² MNO PQR³
How can this be achieved?I think you may want to explain some more context around your question. I can answer for the example you gave but I don't know if it will solve your real problem.
Do Table1 and Table2 have the same number of rows in the same order like in your example? Is the desired output a new table or a modification to Table1? Do Table1 and Table2 have other columns?
Hi,
Table1 and Table2 do not have the same number of columns. Table1 has 200 records and Table2 has 150.
The desired output is modification of the column in Table1. I want Table1.Col1 to be replaced with the values of Table2.Col3.
Table1 has other columns as well.
I want to replace the values. But I cannot find the right solution to do so.
Hi Kiteretsu, another solution:
Output
let Table1 = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WcnRyVorViVZycXUD0+4enmDay9sHTPv6+YPpgMAgMB0cEqoUGwsA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Col1 = _t]), Table2 = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WcnRyVorViVZy9/AE017ePoc2gVkBgUGHNivFxgIA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Col3 = _t]), L = List.Buffer({"¹", "²", "³", "⁴", "⁵", "⁶", "⁷", "⁸", "⁹"}), T2Filtered = Table.SelectRows(Table2, each List.Contains(L, Text.End([Col3], 1)) ), R = Function.Invoke(Record.FromList, Table.ToColumns(Table.AddColumn(T2Filtered, "Custom", each Text.Start([Col3], Text.Length([Col3])-1), type text))), Stepback = Table1, Ad_Replaced = Table.AddColumn(Stepback, "Replaced", each Record.FieldOrDefault(R, [Col1], [Col1]), type text) in Ad_ReplacedHello Kiteretsu,
Thanks for reaching out to the Microsoft fabric community forum.
I hope the answer provided by dufoq3 resolves your issue.
I am also including a similar thread from the community for your reference. If you need any further assistance, please feel free to reach out.
Solved: Replacing values in one column with values from an... - Microsoft Fabric Community
If my response has addressed your query, please mark the helpful reply and accept it as the solution. This will assist other community members in solving similar problems more efficiently.
Thank you.
Hello Kiteretsu ,
May I ask if you have resolved this issue? If so, please mark the helpful reply and accept it as the solution. This will be helpful for other community members who have similar problems to solve it faster.
Thank you.
