view

问题 I created a view named 'myview' as below. create view myview as select 'a' source,col1,col2 from table_a union select source,col1,col2 from table_b ; table_a has an index on col1 , table_b has an index on source , col1 . When I query on myview as below, no index is used. select * from myview where source = a and col1 = 'xxx' ; How do I make the indexes work on this query? Create Code CREATE TABLE `table_a` ( `col1` VARCHAR(50) NULL DEFAULT NULL, `col2` VARCHAR(50) NULL DEFAULT NULL, INDEX

问题 I am running the below code. When I run this code, I get error message: The ORDER BY clause is invalid in views, inline functions, derived tables, subqueries, and common table expressions, unless TOP or FOR XML is also specified. I'm not sure why I am getting this error message. Help is much appreciated. SELECT a.DELINQ_BUCKET_GROUP, a.vv_count FROM ( SELECT DELINQ_BUCKET_GROUP, CASE WHEN DELINQ_BUCKET_GROUP IS NULL THEN SUM(CASE WHEN DELINQ_BUCKET_GROUP IS NULL THEN 1 ELSE 0 END) ELSE COUNT

问题 I am running the below code. When I run this code, I get error message: The ORDER BY clause is invalid in views, inline functions, derived tables, subqueries, and common table expressions, unless TOP or FOR XML is also specified. I'm not sure why I am getting this error message. Help is much appreciated. SELECT a.DELINQ_BUCKET_GROUP, a.vv_count FROM ( SELECT DELINQ_BUCKET_GROUP, CASE WHEN DELINQ_BUCKET_GROUP IS NULL THEN SUM(CASE WHEN DELINQ_BUCKET_GROUP IS NULL THEN 1 ELSE 0 END) ELSE COUNT

问题 I m trying to join two tables and inserting the data in a view in PostgreSQL. While i debug I can see my data but when i check my DB there is no creating of a view. ALso the is nothing as error and i cannot find what's missing. engine = create_engine(DATABASE_URI) view = Table('testing', MetaData()) session = get_db_session() result=session.query(Policy_table,Join_table).filter(Policy_table.name==Join_table.policy_name).all() session.commit() create_view = CreateView(view ,result) engine

问题 i have a view that is a xib, this view contains a buttons for a calculator, I did this because I need a custom keyboard for my app, my app has some views that needs this keyboard the problem is, how I send the data from view to my view controller? in my view controller I only has a textfield and a view with xib custom class I use swift 4.2 custom view and textflied this is my code from my xib import UIKit class keyboardView: UIView { @IBOutlet var viewKeyboard: UIView! var textIntroduced = ""

问题 How to use namespace in laravel View? I mean I have three different folders admin , frontend and client in app/views folder. If I want to load a partial template lets say from admin section views/admin/partials/flush.blade.php in views/admin/account/profile.blade.php I have to include it like: @include('admin/partials/flush') instead I want to just use @include('partials/flush') How can i do that? 回答1: You can extend blade and write a function that fits your needs. Like this: Blade::extend

问题 We created a view for handling complex SQL, But when creating a view using FORCE option. e.g: create or replace FORCE view testview as select 1 from dual; FORCE is removed when viewing the view later create or replace view testview as select 1 from dual; Specify FORCE if you want to create the view regardless of whether the base tables of the view or the referenced object types exist or the owner of the schema containing the view has privileges on them. These conditions must be true before