I have two series namely x and y. x: Index Timestamp 0 2022-11-16 13:00:00 1 2022-11-17 13:48:00 y: Index Timestamp 0 2022-11-16 19:13:00 1 2022-11-17 16:21:00 I combine these two series into a data frame as follows. z = pd.concat([x, y], axis=1) But in the dataframe both the column names appear as "Timestamp". I want… Read More Renaming Columns after concatenating two Series with same Column names
I am working with a malformed database which seems to have double quotes as part of the column names. Example: |"Market" | |———| |Japan | |UK | |USA | And I want to select like below SELECT "\"Market\"" FROM mytable; /* Does not work */ How does one select such a thing? >Solution : The… Read More Postgres escape double quotes
I want to make a new column that is the sum of all the columns that start with "m_" and a new column that is the sum of all the columns that start with "w_". Unfortunately it is not every nth column, so indexing all the odd and even columns won’t work. columnnames <- c("m_16",… Read More R: Sum of all the columns that start with
I have a column where it stores a reference the reference is usually 30 alphanumeric values The column is set as an nvarchar (30). Id like to update this to nvarchar (5), and update all the values currently stored in this column.. is there a way to do this using update? >Solution : First update… Read More Column update – SQL UPDATE statement
I am writing this post to ask for some advice for looping code to rename columns by index. I have a data set that has scale item columns positioned next to each other. Unfortunately, they are oddly named. I want to re-name each column in this format: SimRac1, SimRac2, SimRac3…. and so on. I know… Read More Renaming Columns with index with a For Loop in R