Differences

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--- transformations:lookuprename [2020/02/19 04:18] – dmitry
+++ transformations:lookuprename [2021/07/19 02:19] (current) – [Examples] craigt
@@ Line 1: / Line 1: @@
-===== Rename with lookup =====
+{{ transformations:RenameColumnsAction.png}}
+====== RENAME COLUMNS BY LOOKUP ======
+Category: Transform / Advanced\\
-Category: Transformation / Advanced
+\\
+=====Description=====
+This action renames columns in a table by looking up old and new column names in another table.
-This action renames columns in a table looking up old and new column names in another table. It's typically used when names of columns to rename and/or the new names are not known in advance, and have to be obtained dynamically during a calculation, or from a set of known names in a lookup table.
+The lookup table should have 2 columns: one containing the old names, and one listing the new names.\\
-The lookup table should have 2 columns: old names and new names.
+\\
+=====Use cases=====
+This action is typically used when names of columns to rename and/or the new names are not known in advance and have to be generated dynamically during a calculation, or from a set of known names in a lookup table.\\
-After the action is applied, columns with old names from the lookup table will be renamed to the new names.
+\\
+=====Action settings=====
+^Setting^Description^
+|Lookup table|Select the table containing the old and new column name values.|
+|Column with old names|Select the column in the selected table that contains the original column name values.|
+|Column with new names|Select the column in the selected table that contains the new column name values.|
+The reference to the second table will appear as a dotted line connecting this action to the second dataset in the application window.\\
-**See also**
+\\
+=====Remarks=====
+This action is //case sensitive//.  If the lookup values do not match the existing column names case-wise, a match is not made and the new column name is not assigned.
+If a match to a column is not found in the "old names" lookup column, the column will retain its original name.\\
+\\
+=====Examples=====
+**Example:** Rename the columns in Table 1 using the old/new name pairings in Table 2.\\
+\\
+**Table 1:**  Source table columns.
+^FName  ^LName  ^Add1  ^Cty  ^ST  ^Zip  ^
+**Table 2:** Lookup table
+^Old names  ^New names  ^
+|FName  |FirstName  |
+|LName  |LastName  |
+|Add1  |Address  |
+|Cty  |City  |
+|St  |State  |
+|Zip  |Zip Code |
+\\
+**Action parameters:**
+>Lookup Table is "Table 2"
+>Column with old names is "Old names"
+>Column with new names is "New names"
+\\
+**Result table:**
+^FirstName  ^LastName  ^Address  ^City  ^ST  ^Zip Code  ^
+Notice that "ST" wasn't renamed to "State" due to case issues ("ST" vs. "St").
+\\
+====Community examples====
+  * [[https://community.easymorph.com/t//1432/4|Dynamic transformation]] ([[https://community.easymorph.com/uploads/short-url/1wu0gGctfVxSdnVCjW8GdUymqcw.morph|Project]]; Module: //Main//; Group: //Tab 1//; Table: //Result//; Action position: //4//)
+  * [[https://community.easymorph.com/t//1475/1|Finding all projects with particular action]] ([[https://community.easymorph.com/uploads/short-url/cM8AssOT6zQXD8JDr9adUAy2sDM.morph|Project]]; Module: //Main//; Group: //Tab 1//; Table: //Projects with sandboxes//; Action position: //3//)
+  * [[https://community.easymorph.com/t//1803/3|Create dynamic list from delimited text (dynamic split/dynamic generate list)]] ([[https://community.easymorph.com/uploads/short-url/vd59gCPQiP8m4hiFPZmYiRDKW31.morph|Project]]; Module: //Main//; Group: //Tab 1//; Table: //Output//; Action position: //5//)
+\\
+=====See also=====
+  * [[transformations:rename|Rename columns]]
   * [[transformations:selectbylookup|Select columns by lookup]]