"Power is gained by sharing knowledge not by hoarding it!"
Before any data scientist can concentrate on modeling, they must first master data cleansing. The complexity of your modeling will be determined by how successfully you clean your data. The cleaner your data sets are during the cleansing stage, the simpler the learning algorithms will be during the modeling stage.
There might be a number of reasons why your query is taking so long. SQL performs computations to get the information whenever you execute a query. Query tuning is a technique that makes a query execute quicker by reducing the amount of computations that SQL may do.
If an identity column is specified, how would you load the data into a table? There are multiple ways to achieve this. In this article, I will explain the most efficient way!