Databases
StackOverflow2013
Postsdbo
POstatistic syntax in access
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POstatistic syntax in access
    primarykey
    data
    text
    <p>I want to do some statistic for the <code>Point</code> in my appliation,this is the columns for <code>Point</code> table:</p> <pre><code>id type city 1 food NewYork 2 food Washington 3 sport NewYork 4 food ..... </code></pre> <p>Each point belongs to a certain type and located at the certain city.</p> <p>Now I want to caculate the numbers of points in different city for each type.</p> <p>For example, there are two types here :<code>food</code> and <code>sport</code>.</p> <p>Then I want to know:</p> <pre><code>how many points of `food` and `sport` at NewYork how many points of `food` and `sport` at Washington how many points of `food` and `sport` at Chicago ...... </code></pre> <p>I have tried this:</p> <pre><code>select type,count(*) as num from point group by type ; </code></pre> <p>But I can not group the by the city.</p> <p>How to make it?</p> <h2><strong>Update</strong></h2> <pre><code>id type city 1 food NewYork 2 sport NewYork 3 food Chicago 4 food San </code></pre> <p>And I want to get something like this:</p> <pre><code> NewYork Chicago San food 2 1 1 sport 1 0 0 </code></pre> <p>I will use the html table and chart to display these datas.</p> <p>So I need to do the counting, I can use something like this:</p> <pre><code>select count(*) from point where type='food' and city ='San' select count(*) from point where type='food' and city ='NewYork' .... </code></pre> <p>However I think this is a bad idea,so I wonder if I can use the sql to do the counting.</p> <p>BTW,for these table data,how do people organization their structure using json?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. UShguser
    1. UShguser
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload