Questions about multiple-columns
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Get all results from the customer table. Replace null values in the state and fax columns with an empty string. How to solve this query?
I am very confused about this question .The thing is know that I can use COALESCE function for this but how ?Because there are 2 columns here ,State and Fax
Germanjeet Singh
Votes: 0
Answers: 1
Columns in preview card are not aligned horizontally using HTML/CSS
I am trying to create a 3-column preview card. I cannot get the 3 column to be horizontally aligned. This is a project from Front-end Mentor.
I am new to this I don't know if I wrote this correctly.
T...
Amaya
Votes: 0
Answers: 2
How to compute the NAs with the column mean and then multiply columns of different lengths in R?
My question might be not so clear so I am putting an example.
My final goal is to produce
final=(df1$a*df2$b)+(df1$a*df3$c*df4$d)+(df4$d*df5$e)
I have five data frames (one column each) with differen...
Aidas
Votes: 0
Answers: 2
add new column based on two other columns with several conditions, character
I would like to add a new column to my dataframe based on two other columns. The data looks as follows:
df
job honorary
yes yes
yes no
no yes
yes yes
yes NA
NA no
Now I woul...
Manu97
Votes: 0
Answers: 2