In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "If the table already exists then the bq utility will throw the error Already Exists: Table project-id:datasetname.tablename."

A block of code is set as follows:

SELECT year(pickup_datetime) as trip_year, count(1) as trip_count
FROM [nyc-tlc:yellow.trips] 

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

{  "rule":
  [
    {
      "action": {"type": "Delete"},
      "condition": {"age": 30}
    }
  ]
}

Any command-line input or output is written as follows:

sudo apt-get install google-cloud-sdk
apt-cache showpkg google-cloud-sdk 

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "Choose My Billing Account in the Project or Billing account drop-down and check the Include credit as a budget expense option".