Questions tagged [view]

A virtual table that represents the data in one or more tables in an alternative way.

113 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
4
votes
0answers
2k views

Speed slow down on a UNION ALL view

This is my DB architecture: a 3.000.000 records product (memory) table that must be shared by all databases a x (say 1) records product table specific for each single database a view in each ...
4
votes
2answers
387 views

MySQL: Overlay modifications on original data while indexing on a field that itself has modifications

I have a MySQL table of original_data that is important for historical/auditing purposes and should not ever be changed. I want to be able to mark up these data with modifications, e.g. to correct ...
4
votes
0answers
73 views

Possible SQLite bug?

I am running into an issue with SQLite that I think might be a bug. When I run the PRAGMA table_info command on a view that uses an aggregate function, the data type always comes up empty. To ...
3
votes
0answers
95 views

Time to generate execution plan for select into from a view takes significantly more time than select

I have a view, vw_example, that is quite complicated and has multiple joins across multiple databases. This view has been causing significant delays when used as part of other queries, and we've ...
2
votes
1answer
69 views

Schema binding seems to not be enforced for view doing temporal query

I am using Microsoft SQL Server 2019. There are two strange behaviors that I don't see documented (if it is, please point me to the Microsoft docs link), I suspect they're related. The ...
2
votes
0answers
133 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 ...
2
votes
0answers
148 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 ...
2
votes
1answer
9k views

Why create a Materialized View Log with Primary Key or RowID, etc?

I have a table with 600million rows. I want to create a materialized view that filters it down to 50 million records but also uses REFRESH FAST ON COMMIT. To use REFRESH FAST I need a MATERIALIZED ...
2
votes
0answers
136 views

Permissions on views/stored procedures and the referenced base tables in linked servers

I need help setting up security division between SELECTing and EXECUTEing from views and stored procedures and access to base tables referenced by those objects on linked servers on SQL Server 2012SP3....
2
votes
0answers
278 views

Get the name of the table column referenced by a (auto updatable) view column (PostgreSQL)

Given the folowing view definition create or replace view projects as select id, client_id as clientId from data.projects Is it possible, knowing the view name and the view column to get the name of ...
2
votes
0answers
1k views

force SQLite view column type affinity

Using SQLite 3, I have some view columns which are defined with an expression, and so have no type affinity. Is it possible to define them in a way that forces them to have a certain type affinity? ...
2
votes
0answers
1k views

How to improve performance when joining against coalesce

In an effort to remove a caching layer from our application, I'm building a number of views to encapsulate the different ways a user can have access to a piece of content - one per "rule" of access. ...
2
votes
0answers
324 views

Identity in a view treated as ordinary int - migrating from SQL Server 2000 to 2012

I'm migrating a very old platform from a SQL Server 2000 backend and MS Access 2003 as its frontend to SQL Server 2012 backend and MS Access 2010 as the frontend. This obviously means a bit of ...
2
votes
0answers
80 views

Setting up triggers based on exposed columns in a view's source table

I have a table where I want to do a AFTER UPDATE trigger if one of the columns modified was in a specific view CREATE VIEW [dbo].[iv_EmployeesView] AS SELECT EMPLOYEE_GUID AS EmployeeGuid, ...
2
votes
0answers
68 views

CouchDB views and references

Not sure if/how it is intended to be done but i am trying to match up all the active document in my database with the author of it: function(doc) { if (doc.data.active && doc.data.active =...
1
vote
0answers
22 views

Creating the right index/es for querying views in SQL(ite3)

I have a python script that works by first creating some tables in a SQLite3 DB from lots of text files, then creating some views by joining the tables, and finally querying one of the views and ...
1
vote
1answer
37 views

Improving indexing of jsonb data when the json structure is well defined

I have a simple table records that contains a primary key (id) and a jsonb field (data). The structure of the jsonb is consistent across all rows. I have created a view (metadata) for this table which ...
1
vote
0answers
49 views

MS SQL Server Enterprise 2016 is truncating the audited select statements, how do we fix it?

TL;DR; I am getting SELECT as the audit output instead of the actual (suspected) query SELECT DISTINCT CONVERT(varchar, DecryptByPassphrase(getkey(N'key1'), FIELD1)) as DECRYPTED_FIELD1 FROM view1 ...
1
vote
0answers
62 views

How to optimize MySQL VIEW performance?

All my years of development an this is my first post, so I hope I get this right. I hoping someone can help, my SQL skill is sufficient enough to get me by most of the time, but I'm having poor ...
1
vote
2answers
41 views

Why MySQL doesn't use indexes in view with union select?

I've created a view: create view dh_hits_new_all_old as select * from dh_hits_new_201806 union all select * from dh_hits_new_201807; When I select something with a where clause containing a field ...
1
vote
1answer
42 views

PostgreSQL - trying to speed up query responses from view that has join and group by

I have these two tables: precipitaion: store precipitation data at daily (freq = 'daily') and hourly (freq = 'hourly') frequencies for 7 months so far (I receive regular updates). Column | ...
1
vote
1answer
68 views

Insert into indexed view?

I give an example to show my problem. I create 2 table as the following: CREATE TABLE a ( id INT ) CREATE TABLE b ( name NVARCHAR(10), id INT ) Then insert data into these tables ...
1
vote
1answer
42 views

Only join to latest entry in subselect in a given range determined by the main select

I have one table Haul and one table ChargeCarrier_Storage. The latter contains movements of charge carriers between storage locations. Haul has an arrival and a departure time. I want to join together ...
1
vote
1answer
1k views

MYSQL - How to optimize VIEW performance?

Total profiles - 100000 Each profile is connected to one or more platform Each profile have 50 Tags Each profile have 4 themes I have a user view (total users around 100000) where I am joining all ...
1
vote
1answer
62 views

Creating a view that calculates percentages

I have this table getting populated with top10 destination ports every ten minutes along with a "total" entry that records the total number of bytes and packets transmitted for each port for the time ...
1
vote
1answer
39 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,...
1
vote
0answers
40 views

How to aggregate transactions to form a stateful view which can be updated efficiently?

How to aggregate transactions to form a stateful view which can be updated efficiently? For example how to turn the following transactions: CREATE TABLE txns_combined(from_party,to_party,price,qty,...
1
vote
0answers
63 views

Combining two event tables into one postgres view

I have two tables, events and event_logs. The events table stores the theoretical data on a recurring event whereas the event_log stores specific information on a particular datetime. Event +-----...
1
vote
1answer
6k views

MySQL having variable in view

I have a query that I want to save as a view because it will be used on a different system that we don't have access to. The query basically gets running balances on debit and credit columns from a ...
1
vote
0answers
40 views

View loophole to DENY Select

I am attempting to deny a certain schema from a particular User Group. To do this I used the statement "DENY SELECT ON SCHEMA" statement and it was successful in denying access to the tables with ...
1
vote
0answers
119 views

Invalid views not showing in user_dependencies after first compilation

When I create an (invalid) view that selects from another invalid view, the view does not immediately show up in user_dependencies. I am wondering if this is expected. These are the steps to ...
1
vote
0answers
37 views

Efficient Provision of Multiple Versions of Data

We have a fairly unusual database use case: we have a number of large datasets used for research (the largest being a couple of billion rows). The datasets are used by potentially several hundred ...
1
vote
0answers
155 views

SQL query causes server gone away

I'm developing a database system which stores and caluclates engine performance data. I have been created a new view which selects data from several tables and calculates some values. Now I'm running ...
1
vote
0answers
170 views

Secure view on row level with custom security tables

Let's say I have a following table that lists all member of my application. CREATE TABLE dbo.Member ( MemberId BIGINT, LoginName NVARCHAR(64), SecurityRole NVARCHAR(64) ) I assume that ...
1
vote
2answers
1k views

Mysql: Create a view with multiple self joins without duplicates in result

Just to clarify i can't change the tables structure, so please leave out the "you should change your tables to this and that" answers, thank you. So i have a table entities_attributes_values where an ...
1
vote
0answers
109 views

MYSQL -- Inventory View with calculated fields

Trying To create an inventory view. I have created this query using MS Access query builder since I am no pro at SQL and this is pretty convoluted. When translating this into MYSQL syntax I get an ...
1
vote
1answer
201 views

Insufficient privilege

We are using oracle 11g I am replicating production db for dev environment. I Have a user named CST2 and CST0 where CST0 contains all tables and view and public synonyms for the same. I have provided ...
1
vote
2answers
66 views

Schema/Structure to handle secondary computed data

I'm trying to design a LAMP-based website for my pinball league, which plays competitive pinball every week in match play. One of the features of our league is that we convert raw scores to ...
1
vote
1answer
2k views

MySQL - Problems caused by SQL Security definer or invoker

I have a view used to be defined as: > **CREATE > ALGORITHM = UNDEFINED > DEFINER = `user1`@`localhost` > SQL SECURITY DEFINER VIEW `schema1`.`view1` AS > select &...
1
vote
0answers
6k views

How can I create a view in a stored procedure on MySQL?

I am trying to dynamically create views based on an SQL query and have a trigger recreate them when the fields in the view are to change. When I call the procedure I end up with a permission denied ...
1
vote
1answer
786 views

Making data fetching faster on VIEW

I have created a rest service which fetches data from Oracle database and send it back to the application from which the rest service is called . Below is the query to fetch data from VIEW ,this ...
0
votes
0answers
16 views

View Expansion and Removing "dead variables"

I have a large set of interwoven views in Postgres that sometimes are make inefficient use of other views. For example, CREATE VIEW C AS SELECT A.a, B.b FROM A LEFT JOIN B on A.id = B.id Then, SELECT ...
0
votes
0answers
25 views

select which algorithm a view is using

I have a view in a MariaDB 10.4.13 database that feeds into a database documentation process and gathers data on tables and views used in the database. Amongst other fields it selects which algorithm ...
0
votes
0answers
28 views

MSSQL CDC for views and stored procedures

is it possible to enable CDC for Views or Stored procedures? BR, Val
0
votes
0answers
48 views

Convert jsonb column into view for Grafana

I have a partially dynamic data that I have to save into Postgres 13 and then visualize it in Grafana. Example for one document insert (partial) { "Timestamp": { "$date": { ...
0
votes
1answer
25 views

Counting failed attempt

Here is my code: create table failed_login_attempts( login_id number(5) primary key, date_created timestamp default systimestamp, email varchar2(110), ip varchar2(24), mac varchar2(18), attempt number(...
0
votes
0answers
154 views

MySQL Views breaking mysqldump command

While trying to backup all data from a mysql server with mysqldump I got this error root@server$ mysqldump -uroot -p --master-data=1 --single-transaction --flush-privileges --routines --triggers --...
0
votes
1answer
29 views

Anyway to view original query on top of views using postgres

For example, I have a simple query: SELECT * FROM information_schema.columns where table_schema = 'public'; Which turn out very complex, information_schema.columns is a complex view. Right now, to ...
0
votes
0answers
48 views

Use Python to parallelize processing of rows, or is there a native way?

As mentioned in a recent question of mine, I'm new to Oracle: Running Oracle's sqlldr on VirtualBox VM from my MacBook (client) machine I'm back, this time with a question about the best way to ...
0
votes
0answers
19 views

Does MySQL have a built-in way to tell whether a view is insertable (not just updatable)? E.g., something like the IS_UPDATABLE flag, but for INSERT?

The MySQL documentation for the INFORMATION_SCHEMA.VIEWS table mentions that MySQL sets a flag whenever a view is created that records whether that view is updatable, i.e., whether you can UPDATE the ...