sqlite3 - SQLite select multiple rows using id -


i not sure if there kind of technical limitation or if losing mind. trying query specific rows sqlite database using , conditions on ids of rows want. query not returning results , causing logger throw error stating there syntax error.

here query:

select * equipment id = 2 , id = 3 , id = 4 , id = 7 , id = 11 , id = 34

and here syntax error log:

aug 17 2017 23:12:23  [err]: err002 - query on equipment not prepared: near "=": syntax error @ file: c:\users\geowil\documents\visual studio 2015\projects\ov_pocs\universearc_poc\datasystem.cpp  line: 323.

so, sailed on sqlfiddle try , see if missed something. link below. displaying same behavior, , conditions returns no results running queries on single ids or range of ids works.

http://sqlfiddle.com/#!5/68cd3f/4

am doing wrong or limitation of sqlite?

update:

had brain wave. using id in(1,3,4) works on sqlfiddle want repurpose question asking why works original query did not.

use "in" select multiple tuple. select * equipment id in (2, 3, 4, 7, 11, 34);. every tuple selected if every ids existed in sqlite or database.

for query, logical equation never select 1 of tuple because id won't have 2 or more values (id=2 , id=3: if id equal 2 won't equal 3). in case must use or instead of and. select * equipment id=2 or id=3 or id=4 or id=7 or id=11 or id=34;. every tuple selected if every ids existed in sqlite or database.


Comments

Post a Comment

Popular posts from this blog

Is there a better way to structure post methods in Class Based Views -

i'm using class based views in django , never specify url in ajax calls , omit action parameter in form because know these requests go through post method of class based view. notice view - profile page make many requests depending on user updating on page - post method become convoluted , if/else mess example: def post(self, request, *args, **kwargs): # handle user changing available date if request.post.get('availabledate') != none: self.updateavailabledate(request) return jsonresponse({'result':'success'}) if request.post.get('newprojectname') != none: creative_user = creativeuserprofile.objects.get(id = request.user.id) project = project.create_project(creative_user, request.post['newprojectname']) project.save() return jsonresponse({'projectid': project.id }) if request.post.get('projectimage') != none , request.files['file']: proj...
Read more

performance - Why is XCHG reg, reg a 3 micro-op instruction on modern Intel architectures? -

i'm doing micro-optimization on performance critical part of code , came across sequence of instructions (in at&t syntax): add %rax, %rbx mov %rdx, %rax mov %rbx, %rdx i thought had use case xchg allow me shave instruction , write: add %rbx, %rax xchg %rax, %rdx however, dimay found agner fog's instruction tables , xchg 3 micro-op instruction 2 cycle latency on sandy bridge, ivy bridge, broadwell, haswell , skylake. 3 whole micro-ops , 2 cycles of latency! 3 micro-ops throws off 4-1-1-1 cadence , 2 cycle latency makes worse original in best case since last 2 instructions in original might execute in parallel. now... cpu might breaking instruction micro-ops equivalent to: mov %rax, %tmp mov %rdx, %rax mov %tmp, %rdx where tmp anonymous internal register , suppose last 2 micro-ops run in parallel latency 2 cycles. given register renaming occurs on these micro-architectures, though, doesn't make sense me done way. why wouldn't register renamer ...
Read more

c# - Asp.net web api : redirect unauthorized requst to forbidden page -

im trying redirect unauthorized request forbidden page instead i'm getting forbidden page in response body , how can fix ? here's startup class : app.createperowincontext(storecontext.create); app.createperowincontext<applicationusermanager>(applicationusermanager.create); app.createperowincontext<applicationsigninmanager>(applicationsigninmanager.create); app.usecookieauthentication(new cookieauthenticationoptions { authenticationtype = defaultauthenticationtypes.applicationcookie, expiretimespan = timespan.fromdays(30), }); app.useexternalsignincookie(defaultauthenticationtypes.externalcookie); app.usetwofactorsignincookie(defaultauthenticationtypes.twofactorcookie, timespan.fromminutes(5)); app.usetwofactorrememberbrowsercookie(defaultauthenticationtypes.twofactorrememberbrowsercookie); the method im trying reach : [httpget] [authorize(roles = "admin")] public string getcurrentusername() { return userman...
Read more