After discovering SDQL I've been working to pick up the basics of the query language. Best to start with something easy and work up from there I figure, so the first question I wondered was:

How safe is a lead after each period in the NHL?

Using KillerSports.com as my source (the data goes back to 2006) and filtering for regular season only that answer seems to be: Pretty safe. Teams taking a lead of any kind into the first intermission win 75% of those games. If they hold a lead after two periods that winning percentage jumps to 85%. A 4+ goal lead at any point is a virtual lock, and contrary to popular opinion a one goal lead seems to be the "most dangerous" differential (unsurprisingly) with a winning percentage approx 5% below the "any lead" totals.

The results stack up like so:

Goal Diff / After Period |
>0 | 1 | 2 | 3 | 4 | 5 |
---|---|---|---|---|---|---|

1st | 74.6% | 69.1% | 84.3% | 91.9% | 98.9% | 100% |

2nd | 84.8% | 75.4% | 90.7% | 97.1% | 99.4% | 100% |

Examples of the basic SDQL used to generate these results (updating the goal differential) was:

period scores[0] - o:period scores[0] = 1 and playoffs = 0

and:

(period scores[0] + period scores[1]) - (o:period scores[0] + o:period scores[1]) >= 0 and playoffs = 0

As I get more comfortable with SDQL I am hoping I can find some more insightful questions to answer, but this was a good "get your feet wet" first step.