SQLite count in left join request -


my model 1 wine can have many bottles. these bottles have field output_type null or not null.

actually, can count bottles this:

select count(distinct(bottles.id)) total_bottles wines left join bottles on wines.id = bottles.wine_id , bottles.status=1 , bottles.output_type null

this works well.

but need more: want count bottles stored (output_type null) , count bottles gone (output_type not null) in same request.

so left join not enough because can't count bottles stored , bottles gone in main request.

i have seen this, including "sub request" in left join:

left join (select count(*) bottle_stored bottles bottles.status=1 , bottles.output_type null) total_stored on wines.id = bottles.wine_id

but not working. if working, can duplicate left join count gone bottles.

edit: more explanations here. current request. can count bottles stored (output_type null) each wine.

select wines.id, wines.winery count(distinct(bottles.id)) total_bottles wines    left join bottles on wines.id = bottles.wine_id , bottles.status=1 , bottles.output_type null  wines.status = 1   group wines.id

edit 2 (db schema added):

wines table ----------- id (vc) winery (vc) name (vc) status (int) ...  bottles table ------------- id (vc) wine_id (vc) input_type (int) input_date (datetime) output_type (int) output_date (datetime) status (int) ...

i want:

  • to list wines
  • to count bottles stored (output_type null) each wine of list
  • to count bottle gone (output_type not null) each wine of list

in same request.

my primary , foreign keys varchar because it's uuid (global sync system).

try this:

select count(distinct(bottles.id)) bottles_stored,         (select count(distinct(bottles.id)) total_bottles           wines           left join bottles on wines.id = bottles.wine_id , bottles.status = 1) - count(distinct(bottles.id)) bottles_gone   wines   left join bottles on wines.id = bottles.wine_id , bottles.status = 1 , bottles.output_type null
  1. select bottles stored => bottles.output_type = null
  2. subquery counting total amount of bottles
  3. subtract bottles_stored total_bottles => bottles gone

update after second edit of muqaddar:

first, query list wines (1):

select w.id,        w.name,        w.winery   wines

next, count bottles stored (2) , bottles gone (2) specific wine id = 1:

select count(b.id)    bottles b   b.output_type null ,         b.wine_id = 1

and

select count(b.id)    bottles b   b.output_type not null ,         b.wine_id = 1

as third step combine of 3 queries query (2) , (3) subqueries , replace static id = 1 w.id outer query: 

select w.id,        w.name,        w.winery,        (select count(b.id)            bottles b           b.output_type null ,                 b.wine_id = w.id) bottles_stored,        (select count(b.id)            bottles b           b.output_type not null ,                 b.wine_id = w.id) bottles_gone   wines

-

Comments

Post a Comment

Popular posts from this blog

html - Sizing a high-res image (~8MB) to display entirely in a small div (circular, diameter 100px) -

first of all, thank being patient know simple question more couple of weeks' experience figure out. i've seen folks persevere , helpful on here , hope you're willing me. here fiddle: http://jsfiddle.net/65uzf/ here 1 of places searched answers on here: ( vertically center image thumbnails fix-sized div ) tried solutions on there , didn't work out me. i've searched ~4 or 5 others, , been unsuccessful those, too. what want take large image (what linked background-image #ysypic , #tabpic divs) , display thumbnail version of image in confines of divs have set it. is, using background properties have laid out in css, portion of image displays inside of circular divs. without these properties, display defaults smaller section of image [presumably pi*(50^2) area in top left] terrible resolution. i not care if entire image doesn't display inside of circles (it won't, given difference in shape), , overflow not being displayed fine. want able see figu
Read more

java - IntelliJ - No such instance method -

using intellij's 12 ultimate, i'm running following code in debugger: java import play.api.libs.json.jsvalue; public class foo { ... public jsvalue tojson() { ... } public class fooexample { ... foo foo = new foo(); system.out.println("...); //<-- breakpoint at breakpoint, right-clicked source code , picked "evaluate expression," typing in: foo.tojson() . but following error showed up: no such instance method: play.api.libs.json.jsvalue$class.com.foo.foo.tojson () am doing wrong? foo#tojson calls scala code, if matters. edit had breakpoint after instantiation of foo. downvoted it, deserved it. edit my answer no longer valid after op modified question (i.e. moved breakpoint actual is).. a breakpoint hit before line executed. in case foo has not yet been declared or instantiated (i.e. foo constructor has not yet been called). you'll need put breakpoint @ next line (or step on current line) if want evaluate foo .
Read more

identifier - Is it possible for an html5 document to have two ids? -

i wondering if html5 element can have 2 ids, this: <button id="thing1" id="thing2" name="button1" onclick="change()">click here</button> or this: <button id="thing1, thing2" name="button1" onclick="change()">click here</button> also, if 1 of ids said 1 thing, , other id said thing, 1 used? tl;dr : no. in versions of html, each element can have 1 id. see the spec : the id attribute specifies element's unique identifier (id). [dom] the value must unique amongst ids in element's home subtree , must contain @ least 1 character. the value must not contain space characters. note: there no other restrictions on form id can take; in particular, ids can consist of digits, start digit, start underscore, consist of punctuation , etc. note: element's unique identifier can used variety of purposes, notably way link specific parts of document usin
Read more