Excel中合并两组含同名首列但行数据不全重叠的列（批量操作）

Hey Khaled, let's tackle this Excel data merging problem efficiently—no tedious manual row-by-row work needed! Here's a step-by-step solution that'll get you the exact format you're looking for:

Since both datasets share a common first column, we first need a complete list of all unique values from that column:

• Copy the shared column from both datasets into a new blank column (say, column G) in your sheet.
• Select this combined column, then head to the Data tab > Remove Duplicates. This gives you a clean, unique list of all keys from both datasets—this will be the foundation of your merged table.

Let's assume:

• Dataset 1 is in columns A (shared key) and B (value column)
• Dataset 2 is in columns D (shared key) and E (value column)
• Your unique key list is in column G

Add two new columns next to G (H for Dataset 1 values, I for Dataset 2 values) and use these formulas:

• For column H (fetching from Dataset 1):
  =IFERROR(VLOOKUP(G2, A:B, 2, FALSE), "")
• For column I (fetching from Dataset 2):
  =IFERROR(VLOOKUP(G2, D:E, 2, FALSE), "")
• Drag these formulas down to cover all rows in your unique key list. The IFERROR function ensures that if a key doesn't exist in one dataset, it leaves a blank instead of an error message.

• Rename your columns to something clear (e.g., "Shared Key", "Dataset 1 Value", "Dataset 2 Value")
• Apply any formatting like cell borders or text alignment to mirror the example in your figure.

If you're dealing with thousands of rows, Power Query is a more robust, formula-free option:

• Select Dataset 1, go to Data tab > From Table/Range (ensure your data has headers)
• Repeat for Dataset 2 to load both into the Power Query Editor
• In the editor, click Home > Merge Queries > Merge Queries as New
• Choose the shared key column from both tables, select Full Outer Join (this preserves all rows from both datasets)
• Expand the merged column to bring in the value column from Dataset 2, then replace null values with blanks
• Load the merged table back into your Excel sheet—this will give you the exact combined format you need.

内容的提问来源于stack exchange，提问作者Khaled