Questions tagged [view]
A virtual table that represents the data in one or more tables in an alternative way.
521
questions
2
votes
1answer
20 views
Creating a view (or table) from JSON data with two different shapes
I'm pulling in JSON data from two different sources that have roughly the same information, but in different shapes. Let's say I'm pulling in data about music albums, and one of the API responses ...
1
vote
2answers
20 views
Improving the queries in a view to query custom types
I'll spare you the details, but I've got a situation where I'm going to be creating and managing a lot of custom types. (Postgres 11.4, ultimate deployment under RDS.) It looks like there isn't a ...
-2
votes
1answer
62 views
How to create a VIEW when Table1 is having relation to Table2 on several of it's fields?
My situation (greatly simplified) is as follows:
Table1
ID
Name
Ver1
Ver2
Ver3
Ver4
Table2
ID
Name
...
This table holds the versions
The columns Ver1 - Ver4 are foreign keys and are IDs of ...
0
votes
1answer
56 views
Optimize a postgresql database view query
Given the following database schema (using rails-like associations, as this is a ruby-on-rails project, also please forgive me for how I phrase this for I am new to this forum):
Client has_many Deals ...
0
votes
1answer
36 views
Entity Framework 6: How can I add new column to existing table and at the same time update view (add column) in same migration file [closed]
Example in the EF6 migration file Up method.
I wish to add a new column B in existing table Country.
Sql("ALTER TABLE [dbo].[Country]
ADD [B] INT DEFAULT((0)) NOT NULL;")
Then I will need to ...
1
vote
1answer
24 views
SQL Server 2016 - Disparity Between View Definition and View Design
I've run into an interesting issue with some databases I've inherited, and could use some help unpacking it all.
The Issue
After adding a column to a table, views selecting * from that table are now ...
2
votes
3answers
293 views
How do I query for system views in a SQL Server database?
I have some queries that run against Query Store, the view sys.query_store_wait_stats is not in SQL Server 2016, but it is in SQL Server 2017. I want my queries to work in SQL Server 2016 and SQL ...
0
votes
0answers
25 views
How to count two columns per month per country in MYSQL View
I am trying to modify a view that has been created for my mysql database. I would like to count the total of subscribers and subscribers per month per country. currently the view that I have (see ...
2
votes
0answers
53 views
View with where clause slower than query with same where clause
This query
with periods (PeriodStart,PeriodEnd,ticker,FundamentalId,dimension) as
(select b.reportdate PeriodStart, MIN(a.reportdate) PeriodEnd,b.ticker, b.FundamentalId,b.dimension
from Base a
...
0
votes
2answers
48 views
How to avoid conditional join in order to write a tsql view
I have a scenario where I have Roles, Set, DefaultSet, and CompanySet tables
Roles table
RoleName
---------
Admin
Viewer
User
Set table
Id Name
--- ----
1 Employee Data
2 Help ...
0
votes
0answers
17 views
MySQL view extremely slow despite indexes
I'm having an issue with a view, when I make a query it brings CPU to 100% and it keeps loading.
The view is:
https://pastebin.com/ZgB7rr91
channel_data_60 table contains about 1,200,000 records:
...
0
votes
0answers
36 views
Common way to handle a changing reference in dependency of status
I am new to SQL an SQLite, so this is probably a silly question.
I am designing the data model for a commercial application. While documents (like quotes) are being created, I need to reference to ...
0
votes
1answer
40 views
Dropping a table/column automatically drops views using it - how to warn instead?
If I have a view that uses a column, and I remove that column/table, the view is dropped automatically.
Is there a setting I can change such that it instead prevents the removal of the column/table, ...
0
votes
0answers
40 views
How to formulate a query and view for the following structure?
Consider the following table structure:
TableA
ColumnA ColumnB ColumnC
Ro1 A 1
Ro1 A 1
Ro7 A 3
Ro2 C 1
Ro3 B 1
Ro3 B 1
...
0
votes
0answers
67 views
Allocating Rows From One Table to Available Date Range in Second Table
I designed a Shop Floor Scheduling System and it’s been running well for years, but the managers are now asking for something more precise and what they are asking for puts me outside my comfort zone. ...
8
votes
2answers
83 views
Will Postgres perform the computation of calculated columns that aren't selected in a view?
I'm trying to understand the performance impact of selecting data from a view, where one of the columns in a view is function of other data in the original table.
Does the computation get performed ...
0
votes
0answers
29 views
Different Permissions Behavior For Information Schema on Views
I have a view which have following definition
Create view view1
as select *
from information_schema.events
where event_schema="database1"
I have granted select permissions on the view1 to ...
0
votes
0answers
38 views
Postgresql: how to create a View combining regular Tables A, B, C and pivoted table D with a json field?
I have created a standard view, VIEW, that includes different fields from different tables:
SELECT e.id AS "Employee Id",
concat(e.first_name,' ',e.additional_family_name,' ',e.family_name) AS "...
0
votes
1answer
27 views
Database VIEW with a dynamically changing filter
I am trying to create a view based on a specific case. Following is my table:
Table Name: Calls
CustomerName | CallID | Timestamp | Quality | PacketLoss | Jitter
The goal is to create a view that ...
2
votes
2answers
85 views
SQL script to count rows for all views in a database with SELECT-only access
I need to know the row count for every view in a third-party database that I have been given SELECT-only access to. The following script works for tables but not views:
SELECT SCHEMA_NAME(A....
0
votes
2answers
124 views
MySQL Create View WITH CTE
I have successfully created a VIEW in SQL Server as follows. But when I try the same in MySql, Error coming.
SQL SERVER Command:
CREATE VIEW [dbo].[vw_PurchParent] as
WITH cte AS
(
SELECT a._Id,...
0
votes
0answers
24 views
Reconciling AR Payments against invoices
I have a situation I have been working on for quite some time. We sometimes give our customers extended terms and allow them to make payments toward a larger invoice. Those payments are expressed with ...
5
votes
2answers
245 views
How to get SEEK accessing converted ID via view
Assume I have a table:
-- just for test purposes
CREATE TABLE SomeTable (
ID INT IDENTITY(1,1) NOT NULL CONSTRAINT PK__SomeTable__ID PRIMARY KEY CLUSTERED
,SomeColumn1 NVARCHAR(50) NULL
,...
0
votes
3answers
797 views
How to copy data into same table based on existing data in sql?
It is possible to copy a set of rows based on Date column and insert in same table with different date?
For example : I have 5 rows with Date column value '201839'
I need to copy those 5 rows in '...
0
votes
0answers
47 views
Create indexed view with fluctuating data behind
I´ve heard about indexed-views in MSSQL which can increase the performance.
My problem is that I want to create a view which joins round about 5 tables. The tables are constantly updated and are ...
1
vote
2answers
63 views
Resetting a new archiving database
I have an archiving question.
We have a History DB used for archiving old records from our main system and the application knows to query it
However, it becomes too big.
I would like to ...
2
votes
1answer
258 views
SQL Create Script DDL Table from View
How do I script a Create Table DDL for a View?
Example View:
create view dbo.CustomerTransaction
as
select
cust.CustomerId, -- this is int
cust.CustomerName, -- varchar(25)
tr....
1
vote
1answer
36 views
SQL Find Code for Each Separate Column in View
We have a SQL View, trying to find the calculation/business logic for each column into a select or table.
create dbo.CustomerVw
as
FirstName + ' ' LastName as FullName
datediff(yy,BirthDate,...
0
votes
1answer
20 views
using view (necessary) with where conditions (dynamically)
Suppose we have two tables like A {a1, a2, a3 ...} and B{b1, b2, b3 ...}
We are using a MySQl view like
Select a.a1, b.b1 from A a Left JOIN B b ON a.a2=b.b2
Now our requirement is that we have ...
0
votes
1answer
24 views
Create a view for A table with new columns JOIN(ed) on B table queries about the last maching records with certain parameters. How to simplify code?
I'm not sure if I can ask this question here. Let me know if I can't. Basically, my code works fine, but I would like to improve the code itself.
I'd like to improve this code to require fewer lines (...
0
votes
0answers
27 views
Mimic “returning” in an oracle 12c updatable view
We would like to use updatable views in some cases where information is split across several tables for allowing the use of foreign key constraints. This works well utilizing "instead of triggers" (...
0
votes
0answers
92 views
Permission issue with a view built on top of foreign tables
I am consolidating data from several postgresql databases, all with the same schema, into a new one. To do that I mapped the tables I am interested in the new DB as foreign tables with postgres_fdw. ...
-1
votes
1answer
31 views
How to make your SQL data available for people without database access? [closed]
I have several report views that are relevant for a few people that have no SQL knowledge so I guess the best solution would be to put them on a website. Surely data sharing must be a common thing to ...
7
votes
1answer
189 views
How to get cross apply to operate row by row on a view?
We have a view that is optimized for single item queries (200ms no parallelism):
select *
from OptimizedForSingleObjectIdView e2i
where ObjectId = 3374700
It also works on small sets of ...
0
votes
0answers
30 views
Force query plan to filter early when querying view? [duplicate]
I've got a view defined that lists transactions together with a running total, something like
CREATE VIEW historyView AS
SELECT
a.createdDate,
a.value,
m.memberId,
...
11
votes
1answer
169 views
Why can you only drop a SQL Server view in the current database?
Just noticed this and was having a hard time coming up with a technical reason for it.
Tables can be dropped using three part names, but views are restricted to two part names.
What is the ...
0
votes
2answers
216 views
Using “nolock” hint for the SQL View (MSSQL)
Could you help evaluate the "nolock" hint necessity for the View.
From the view definition, we notice that there’s no WITH(NOLOCK) SQL hint added to any table reference. Thus, all the reports ...
0
votes
0answers
35 views
Postgresql view that calculate if payment is paid based on previous rows
I have go DB structure like here: db-fiddle
I'm looking for some solution that in View for charge_line_tab table will add information if charge line is paid or not, based on previous records in ...
1
vote
0answers
57 views
explain on view shows derived while explain on select shows simple select type
I have a view v which involves a couple of sub-selects in its SELECT clause plus a couple of joins by id or indexed column.
The view query is like:
SELECT col1, col2, (SELECT ... FROM subt) AS col3 ...
1
vote
1answer
72 views
Print Column Names for Synonym for Table in Another Database
I am utilizing one database A. How do I print out the columns names for synonym for table in another database B?
create table DatabaseB.dbo.Customer
(
CustomerId int primary key,
...
2
votes
2answers
209 views
Generate SQL Table DDL from a View
How do I generate table structure from a view, in one script? Will only need data types, I am seeking a Table Create Script with some type of dynamic sql
(1) can remove primary key/constraint,
(2) ...
0
votes
0answers
138 views
Resolving “there is unknown charset/collation names” warnings on views
I recently moved our MySQL 5.6 server over to MariaDB 10.3.10 and, for the most part, have not had any problems. We have a couple of databases that have close to 1000 views which are now filling the ...
0
votes
1answer
176 views
MySQL slave only views
We are kind of struggling while creating the infrastructure for our BI sector.
I had read on this link that it is possible to create views on a read-only slave. Still, when I run the query I get
"...
0
votes
1answer
28 views
How I develop Union Report Views for Multiple Single Tenant Databases?
We have a database for each customer, over 20+ databases. All database schemas are the same. Now we want to create a Consolidated Reporting View for All Databases, for total database analysis. How ...
-1
votes
1answer
166 views
Migrate View from Oracle to PostgreSQL (with extractvalue() function)
I'm migrating a database from Oracle to PostgreSQL and have a problem with several Views.
I can't find an equivalent function for extractvalue() and xmltype()...
NVL(extractvalue(xmltype(METADATA), '...
3
votes
2answers
180 views
How to Develop Union Reports from Single Tenant Databases?
We have a database for each customer, for over 700 databases. All the schemas are the same. Now we want to conduct Reporting for : All Databases Customer Analysis. Many db professionals prefer single ...
1
vote
2answers
366 views
running many CREATE VIEW and GRANT SELECT statements in one execution
Is there a way to run multiple CREATE VIEW commands and/or multiple GRANT SELECT commands by hitting F5 in SQL Server Management Studio? If so, how can I do this?
5
votes
2answers
3k views
“If not exists” using OBJECT_ID() doesn't work for views and triggers. why?
For tables I can implement "if not exists" and "if exists" as folows:
--if table exists - drop
If OBJECT_ID('A','U') is not null
Drop Table [A]
--if table not exists - Create
If OBJECT_ID('A','U') is ...
6
votes
1answer
170 views
Query is fast but becomes sluggish when created as a view
Execution Plan as Query
SELECT VP.Branch
, VP.ROUTE AS Route
, VP.SAPCustomerID
, S.CustomerID
, S.ProductID
, S.Date
-- Group by Customer
, CustomerQuantity = SUM(...
-1
votes
1answer
50 views
Need Help With View Where Condition
I am creating a View to grab contact information from my database. This is the code I have for the view at the moment:
CREATE VIEW SupplierContact AS
SELECT
sc.first_name + ' ' + sc.last_name AS ...
