gets a date, such as 2018-08-01 , and normal query statement is between somedate > 2018-08-01 00 between somedate 00 and somedate ...
the environmental background of the problems and what methods you have tried now the project is a node service. For the two nodes, postgresql does read-write separation, and the master node does write operations. Due to the large amount of data, you n...
-sharp-sharp +------------+--------------------------+-----------------------------------------------------+ | Column | Type | Modifiers | |------------+--------------------------+-------...
problem description celery uses prefork mode (4 processes) and is used in conjunction with psycopg2. Each startup can successfully complete a celery task. InterfaceError: cursor already closed appears when the second task is carried out. What should...
php version is 5.6.36 Magi Apache server version 2.4.3Jet Postgresql version 9.5.1 read other people s code, in theory, it will be no problem if it is deployed directly. initially suspects that there is something wrong with the local php environment ...
for example: < table > < thead > < tr > < th > id < th > < th > num < th > < tr > < thead > < tbody > < tr > < td > 1 < td > < td > 1 < td > < tr > < tr > < td > 2 < td > < td > 20 < td > < tr > < tr > < td > 3 < td > < td > 30 < ...
Project background: the intranet OLAP application, specifically, is a variety of statistical charts for leaders to see. The project concurrency is small, so multiple threads can be used for a single request. The bottleneck is that the statistics of SQL ...
has recently been using the json format of postgresql database and found that pdo query reported an error the source code is as follows <?php PDO $pdo = new PDO("pgsql:host=127.0.0.1;port=5432;dbname=postgres","postgre...
No place was found. ...
my django project Subject accounts courses views.py tests test_models.py subject test_models.py: from django.core.urlresolvers import reverse from django.test import TestCase from .models import MultiSub...
how does postgres convert tables to CSV? in ubuntu virtual machines google found COPY ( SELECT name, category_name FROM products LEFT JOIN categories ON categories.id = products.category_id ) TO path to output.csv WITH csv; but using this ...
two questions: Why the length of the int4 type of postgresql can reach 10 bits, but it is set to 32 bits in the attribute The int4 type length of postgresql is set to 32 bits by default, so why can t it be modified? it is still 32 bits after modif...
1 is the original data in the table a numeric value or a formatted time string for Magi Postgresql timestamp? 2, if it is a formatted string, is his own sorting performance very poor? 3, if it is a numerical value, can you check it directly according t...
download PostgreSQL10.3 and open pg4Admin and then flicker or fail to open the default browser when you report an error. I tried to uninstall and reinstall many times without solving it, but the SQL Shell interface is available. tried to download va...
Longge question post: in HATP scenarios with large data bases, would you use self-increasing id as primary key or UUID? Or what do you suggest? Why? ...
two programs merge, each has its own database, want to merge this piece together, do not intend to change the code, this will change bigger, there is no simple way to directly modify the database, I intend to first merge the database, such as table An an...
there are two minor problems: 1. The insertion time of postgresql is the same when executing batches. Is there any way to make them inconsistent? 2. When duplicate data already exists in the library, the entire execution fails. For example, 10 entries ...
Table: ID name value time 1 A 3 2018-1-1 1 A 4 2018-4-4 2 B 6 2018-1-2 3 C 7 2018-1-3 3 C 9 2018-4-6 how to group by ID and only take the most recent value of time (time) under the same ID and name: such as: ID name value time 1 A 4 2018-4-...
A registration function. The function of accessing the registered url, url is to read the user names and passwords of 500 users from the excel file, read out a piece of data, run the create_user function at a time to create a user, but this will cause t...
sys.path.insert(0,BASE_DIR) , sys.path.insert(0,os.path.join(BASE_DIR, db_tools ))sys.path.insert(0,os.path.join(BASE_DIR, apps ))sys.path.insert(0,os.path.join(BASE_DIR, extra_apps )) :shell from goods.models import Goods :python models.py:Tra...
when using vue, if I have an input to enter, after typing, I use button to get the input value, and then do subsequent operations. Generally, we use v-module to bind input to data. but if my input is looped out, typing one causes the other to be linked...
I use the developer-defined mode, and I can return messages normally after I click. it is strange that some others can return normally, and some do keep saying, "the service provided by this official account has malfunctioned. Please try again later. "...
paste the code first appModule.ts: import { BrowserModule } from @angular platform-browser ; import { NgModule } from @angular core ; import { AppComponent } from . app.component ; import { LoginComponent } from . login login.component ;...
Front end: VUE back end: Laravel my requirement is that the verification code generated at the backend is stored in the session, and then the verification code in the session is compared with the verification code sent from the front end when the fro...
part of the code is as follows: const axiosAPI = axios.create({ baseURL: GlobalPath.ajaxurl, timeout: 8000, responseType: "json", withCredentials: false, validateStatus: function (status) { return (status >= 200 && st...