In this case, the comment describes a permissible variation of the syntax.Cleaning data is an essential step in increasing the quality of data.In Lesson 4, we learned about how to read data quickly an let go of the connection with the Sql Data Reader.
This Data Wrangling Handbook recipe looks at six common ways that a dataset is ‘dirty’ and walks through time-saving ways you can use a spreadsheet to fix them and ‘clean’ the dataset.
The recipe is very detailed, because data cleaning is all about attention to detail.
You will use the WHERE clause of the UPDATE statement to restrict the update to a single row. The basic syntax is: INSERT, table name, column list, VALUES, and then a list of the values to be inserted.
The two hyphens in front of a line indicate that the line is a comment and the text will be ignored by the compiler.
A Data Set is an in-memory data store that can hold numerous tables.