使用 B 列数据将 A 列数据连接到 C 列

Question

Using if condition I need column A data to be concatenated according to column b. See column C for results.

Answer 1

Easy with a helper column. In D2 enter 1 and in D3 enter:

=IF(B3="","",ROW())

and copy downwards. In C2 enter:

=IF(B2="","",TEXTJOIN(" ",TRUE,INDEX($A$2:A2,MAX($D$1:D1)):A2))

and copy downwards:

Answer 2

This needs 3 columns:

Into column C, type:

=COUNTIF($B10:$B$10,">0")

at the bottom of the column, and drag upwards. This counts the numbers in the range, and assigns each subrange a value.

Into column D, type:

=IF(C2<>C1,A2,CONCAT(D1," ",A2))

at the top of the column, and drag down. This concatenates each subrange.

Finally, into column E, type:

=IF(B2="","",D2)

at the top of the column, and drag down. This only shows the results we want.

Also, make sure there is a header or blank line at the start of the data.