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To combine data from separate columns into a single cell with comma-separated values in both Microsoft Excel and Apple Numbers, you can use the following methods:

Using the <code>TEXTJOIN</code> Function (available in Excel 2016 and later):

Assuming you have data in cells <code>A1</code>, <code>B1</code>, and <code>C1</code> that you want to combine:

This formula concatenates the values in <code>A1</code>, <code>B1</code>, and <code>C1</code>, separating them with commas. The <code>TRUE</code> argument ensures that any empty cells are ignored.

Using the Ampersand (<code>&amp;</code>) Operator:

For versions earlier than Excel 2016, or as an alternative method:

=A1 &amp; "," &amp; B1 &amp; "," &amp; C1

This formula concatenates the values in <code>A1</code>, <code>B1</code>, and <code>C1</code>, inserting commas between each value.

1. Using the <code>TEXTJOIN</code> Function (available in Excel 2016 and later):
 Assuming you have data in cells <code>A1</code>, <code>B1</code>, and <code>C1</code> that you want to combine:
 =TEXTJOIN(",", TRUE, A1:C1)
 This formula concatenates the values in <code>A1</code>, <code>B1</code>, and <code>C1</code>, separating them with commas. The <code>TRUE</code> argument ensures that any empty cells are ignored.
2. Using the Ampersand (<code>&amp;</code>) Operator:
 For versions earlier than Excel 2016, or as an alternative method:
 =A1 &amp; "," &amp; B1 &amp; "," &amp; C1
 This formula concatenates the values in <code>A1</code>, <code>B1</code>, and <code>C1</code>, inserting commas between each value.

Apple Numbers does not have a direct equivalent to Excel's <code>TEXTJOIN</code> function, but you can achieve similar results using the <code>CONCATENATE</code> function or the ampersand (<code>&amp;</code>) operator.

Using the <code>CONCATENATE</code> Function:

Assuming you have data in cells <code>A1</code>, <code>B1</code>, and <code>C1</code>:

This function combines the values in <code>A1</code>, <code>B1</code>, and <code>C1</code>, inserting commas between each value.

This method concatenates the values in <code>A1</code>, <code>B1</code>, and <code>C1</code>, with commas separating each value.

1. Using the <code>CONCATENATE</code> Function:
 Assuming you have data in cells <code>A1</code>, <code>B1</code>, and <code>C1</code>:
 CONCATENATE(A1, ",", B1, ",", C1)
 This function combines the values in <code>A1</code>, <code>B1</code>, and <code>C1</code>, inserting commas between each value.
2. Using the Ampersand (<code>&amp;</code>) Operator:
 Alternatively, you can use:
 A1 &amp; "," &amp; B1 &amp; "," &amp; C1
 This method concatenates the values in <code>A1</code>, <code>B1</code>, and <code>C1</code>, with commas separating each value.

Note: Ensure that the cells you are combining contain text or numbers. If any cell is empty, the formulas will still insert the comma, which may result in consecutive commas in the output.

These methods allow you to merge data from multiple columns into a single cell with comma-separated values in both Excel and Numbers.

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