sql - Left Join table giving uncessary extra rows -

-

good day.

i writing query against 2 tables, table , table b.

table has 57 rows. resultant should same row count table a.

table b has 44 rows.

script

;with ss       (select distinct *             tablea),       ss2       (select distinct *             tableb)  select distinct a.lotid, a.name,                 b.machine_id    ss         left join ss2 b                on b.recipe_id = a.id  b.machine_id = 1

table a

           id   lotid   name             62  fr 3    2000w - 200w/ms              63  fr 3    2000w - 180w/ms              85  fr 2    2000w - 173w/ms              87  fr 2    1200w - 173w/ms              197 fr 2    1100w - 185w/ms              200 fr 2    2000w - 185w/ms              204 fr 2    1200w - 41w/ms               218 fr 5    kst / test               220 fr 5    2000w - 29w/ms               221 fr 4    2000w - 185w/ms              222 fr 5    2000w - 185w/ms              223 fr 2    n2000w - 200w/ms                 224 fr 3    2000w - 185w/ms              225 fr 5    2000w - 257w/ms              226 fr 4    2000w - 257w/ms              227 fr 5    1300w - 190w/ms              228 fr 4    1300w - 190w/ms              229 fr 4    2000w - 200w/ms              231 fr 2    2000w - 152w/ms              233 fr 3    2000w - 152w/ms              234 fr 5    600w - 29w/ms                235 fr 4    600w - 29w/ms                236 fr 5    2000w - 200w/ms              238 fr 5    1500w - 41w/ms               239 fr 4    1500w - 41w/ms               240 fr 3    1100w - 218w/ms              241 fr 2    1100w - 218w/ms              242 fr 4    1100w - 218w/ms              243 fr 5    1100w - 218w/ms              244 fr 5    1100w - 175w/ms              245 fr 5    2000w -173w/ms               246 fr 4    2000w - 173w/ms              247 fr 2    1300w - 190w/ms              248 fr 3    1300w - 190w/ms              249 fr 5    2000w - 207w/ms              250 fr 4    2000w - 207w/ms              251 fr 5    2000w - 182w/ms              252 fr 5    2000w - 190w/ms              253 fr 5    2000w - 186w/ms              254 fr 2    dm2000w-200w                 255 fr 2    2000w - 200w/ms              256 fr 3    n2000w -200w/ms              257 fr 5    1300w - 177w/ms              258 fr 4    n2000w - 207w                259 fr 2    2000w - 202w/ms              260 fr 3    2000w - 202w/ms              261 fr 3    1300w - 218w/ms              262 fr 2    1300w - 218w/ms              263 fr 2    1300w - 155w/ms              264 fr 3    1300w - 155w/ms              265 fr 5    2000w - 43w/ms               266 fr 4    2000w - 43w/ms               267 fr 2    2000w - 257w/ms              268 fr 3    2000w - 257w/ms              269 fr 5    2000w - 178w/ms              270 fr 5    1300w - 155w/ms              271 fr 4    1300w - 155w/ms

table b has following data

  machine_id   recipe_id     1   63     1   85     1   87     1   197     1   200     1   223     1   231     1   241     1   247     1   254     1   255     1   259     1   262     1   263     1   267     2   62     2   85     2   87     2   197     2   200     2   224     2   248     2   256     2   260     2   261     2   264     2   268     3   218     3   226     3   228     3   229     3   246     3   250     3   258     3   266     3   271     4   218     4   225     4   227     4   236     4   243     4   257     4   265     4   269     4   270

for result, trying 57 rows . results getting are

id   lotid   name          machine_id 63  fr 3    2000w - 180w/ms 1 85  fr 2    2000w - 173w/ms 1 87  fr 2    1200w - 173w/ms 1 197 fr 2    1100w - 185w/ms 1 200 fr 2    2000w - 185w/ms 1 223 fr 2    n2000w - 200w/ms    1 231 fr 2    2000w - 152w/ms 1 241 fr 2    1100w - 218w/ms 1 247 fr 2    1300w - 190w/ms 1 254 fr 2    dm2000w-200w    1 255 fr 2    2000w - 200w/ms 1 259 fr 2    2000w - 202w/ms 1 262 fr 2    1300w - 218w/ms 1 263 fr 2    1300w - 155w/ms 1 267 fr 2    2000w - 257w/ms 1

as can see getting 15 rows or so. want getting 57. how return rows table while joining table b?

any appreciated. thanks.

remove this

where b.machine_id = 1

only use table 'a' in if dont want table b contraining resulst

for criteria relevan table 'b', put in join.

e.g.

;with ss   (select distinct *         tablea),   ss2   (select distinct *         tableb)  select distinct a.lotid, a.name,             b.machine_id    ss         left join ss2 b                on b.recipe_id = a.id , b.machine_id = 1 a.name = 'foo'

Comments

Post a Comment

Popular posts from this blog

ios - Memory not freeing up after popping viewcontroller using ARC -

-
hi project arc based, using uinavigationcontroller make transition between viewcontroller. using profiler analyse happening behind scene memory. noticed when push viewcontroller allocate memory components , when pop not freeing allocated memory. since using arc unable implement dealloc or release component. have analysed in detail , there no memory leak in project. i not using strong property push viewcontroller. here how pushing viewcontroller. viewcontroller *obj = [[viewcontroller alloc] init]; [self.navigationcontroller pushviewcontroller:obj animated:no]; any clue whats going on? should free memory have consumed. please advise your description indicates have retain cycle, leads objects not being deallocated. typical source of retain cycles properties assigned loading nib files (usually declared iboutlet ). two strategies break them , release objects: declare property weak : @property (nonatomic, weak) iboutlet uilabel *statuslabel; set property nil in...
Read more

Django REST Framework perform_create: You cannot call `.save()` after accessing `serializer.data` -

-
i have following viewset: class artistprofileviewset(viewsets.modelviewset): queryset = artistprofile.objects.all() serializer_class = artistprofileserializer def perform_create(self, serializer): if serializer.is_valid(): serializer.save() with following serializers: class simpleartisttrackserializer(serializers.hyperlinkedmodelserializer): class meta: model = artisttrack fields = (...my fields...) class artistprofileserializer(serializers.hyperlinkedmodelserializer): owners = userserializer(many=true, required=false) tracks = simpleartisttrackserializer(many=true, required=false) class meta: model = artistprofile fields = (...my fields...) i getting following error: assertionerror: cannot call `.save()` after accessing `serializer.data`.if need access data before committing database inspect 'serializer.validated_data' instead. i don't see editing serializer.data object. th...
Read more

Why does Go error when trying to marshal this JSON? -

-
i'm trying rather simple example of trying decode json file structs using golang. however, when attempting error that json: cannot unmarshal object go value of type []main.track which don't understand. here's code in question, , json can found here . package main import ( "encoding/json" "fmt" "net/http" "os" ) // tracks group of track types type tracks struct { tracks []track } // track represents singular track type track struct { name string url string artist artist } // artist represents single artist type artist struct { name string mbid string url string } func main() { url := "http://ws.audioscrobbler.com/2.0/?method=geo.gettoptracks&api_key=c1572082105bd40d247836b5c1819623&format=json&country=netherlands" response, err := http.get(url) if err != nil { fmt.printf("%s\n", err) os.exit(1) } de...
Read more