''' Given an example table a with columns user_id, item_id, searches, and clicks; transform it into table b with format user_id, item_id1, CTR1, item_id2, CTR2, item_id3, CTR3 which shows the summary ...

Data transposition aims to convert queried data into a specified format to display using front-end applications, such as reporting tools. There are row-to-column transposition, column-to-row ...