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

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MySQL Views Authorization

Questions: Is there a way, using SQL, to identify how many views are in the database per user? How can you authorize/deny users access to delete views created by another user?
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Materialized View - vs. New Calculated table for performance [closed]

I have a problem - I'm trying to de-normalize data tables in a data warehouse in preparation for use in the Business Intelligence/ Presentation layer. By denormalize I mean create a series of joins. ...
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43 views

postgresql: deleting from a view

In Postgresql 9.4, we're doing a view as a UNION of to tables A and B, and we'd like to have a single DELETED N ROWS message when we 'delete' the records in the underlying tables (via a a trigger on ...
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1answer
92 views

How can I allow a user to query a view but not the underlying table in MySQL?

I have searched for this question but cannot find an answer. Or, the answers I have found have been related to SQL Server. This is for MySQL 5.x. Anyway, say I have a table called Employees and in ...
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70 views

Optimization suggestions for db2 materialized view

I have a view for db2 9.7 which has consolidated o/p from few tables. The view is built and it is working fine I want optimization suggestions on the view SQL CREATE VIEW XYZZ AS SELECT ...
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1answer
121 views

Best way to design a database with one person with different roles

We've been browsing for a while looking for an answer to this, but any of them suited exactly my needs, I hope is a relevant question. We have a database for managing books. In this database, a same ...
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1answer
67 views

Adding a column to the view which shows the date in format YYYYMM

In the following view, I want to add a column (not alter the view) named say "ABC" which shows the date in format YYYYMM (no date, only year and month). How can I do that? I am using db2. create view ...
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199 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 ...
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1answer
121 views

Is there a way to make an OOo form for PostgreSQL updateable view?

I have a PostgreSQL database, with data from some 8 tables (not counting enums implemented as a table referenced by foreign key) summarized in a view. I made an INSTEAD OF trigger, so the view is in ...
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67 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, ...
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55 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 =...
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2answers
358 views

Complex view becomes slow when adding ORDER BY in outer query with small LIMIT [closed]

I have a pretty large query in a view (let's call it a_sql), that is really fast unless I use ORDER BY in an outer SELECT with a small LIMIT: SELECT customs.id AS custom_id, customs.custom_name AS ...
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3answers
605 views

Selecting from a view shows the wrong set of columns

I'm selecting from a view in SQL Server. If I right-click on it and choose "Select Top n Rows", it runs and shows me 30 columns. If I open the view in ALTER mode (right-click, Script View As, etc...),...
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1answer
451 views

SQL Server table and view show different values

I have a view that selects data from a table that is showing different data. The table is dbo.user, the view is dbo.users (don't judge, I inherited this system). The view is simply select * from ...
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1answer
761 views

Using View filters for tenants in SQL-Server 2008

I'm currently creating a Multi-tenant data architecture in a SaaS BI-product. The product are using shared database and shared schema, but with tenant view filters and tenant data encryption (...
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1answer
411 views

Performance hit with column alias

I have a database in SQL Server 2008, with the final data table having about 2 million rows. The development team is implementing a new application and they have suggested changing the column name to ...
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1answer
596 views

PostgreSQL - Create view with autoincremental column

I have a PostgreSQL table, and I need to create a view with a new column. This column needs to be an auto-incremental column starting at 1 and going to N. Is this possible to do without effecting the ...
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2answers
37 views

Create view with group by and extra fields

I had a hard time putting the question title together but essentially I want to create a view like this: ALTER VIEW vPlaceStatistics AS SELECT COUNT (TypeID) as Count, TypeID FROM PlaceStatistics ...
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1answer
58 views

SQL Server execution plan using a view, but no view is inside the stored procedure

I am troubleshooting this slow stored procedure and when checking the actual execution plan I noticed a warning of a possible missing index. Taking a closer look, it's against one of the views, not an ...
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2answers
372 views

Indexed views on double linked server

A server SERVER_A has some data. A server SERVER_B defines A as a linked server, and defines some views on the data. The queries are like this: CREATE view myview as select * from openquery ( ...
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1answer
887 views

Can I alter a view being referenced with schemabinding if the change fulfills the binding requirement?

In SQL Server 2008, I have views WITH SCHEMABINDING and I need to alter one. I am changing a column while not changing its alias so consumers will be unaffected. If I were to drop all my other views ...
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1answer
154 views

Does the SQL Server Backup Database Command also backup views from a Database?

I have a backup job (SQL Server Agent job) which will iterate through all of our SQL Server databases in SSMS, invoke the BACKUP DATABASE command to create a .bak file on a different server. This ...
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2answers
2k views

MySQL Reusing calculation in SELECT clause in a VIEW

I have an SQL query that has a simple date difference between NOW() and the creation date (is in the table). I need to reuse this again within the SELECT clause in a VIEW. Is this possible at all? ...
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1answer
128 views

Where do caching servers conceptually fit in my architecture?

Given the simple well-known architecture below: Where (conceptually) does the caching server(s) sit?
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1answer
1k views

Triggers vs Views in MySQL

We are in the process of denormalizing a large amount of data for performance reasons. Basically a Query that would normally JOIN over 10 tables is replaced with a Query that has no JOINs, yet all the ...
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1answer
207 views

Add info to mysql view around an IP address - 10.10.1.100 to https://10.10.1.100

I have built a database in MySQL to replace the use of MANY excel spreadsheets that document our servers, network, IP addresses, etc. In that database I have created a view called DRAC (dell remote ...
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1answer
70 views

Does schema binding views affect performance?

Does schemabinding views affect performance in SQL Server or is just to prevent accidental changes?
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2answers
173 views

Multiple-View Query Optimisation

We have a monster view that contains joins to many (many) tables in order to return the data that is required. In some cases, to get a column of information, we've have to join onto 4 tables, just to ...
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1answer
323 views

Is it possible to create a view in one database from another database in oracle when databases are different machine?

Lets say I have a oracle database db1(actually user) in machine A and another database db2 in machine B. Is it possible to create view in db2 from db1.If possible how ?
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1answer
109 views

Index optimization on a view using a full outer join

Table structure: Foo FooChild Bar --- -------- --- ID ID ID Date FooID Date ...
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1answer
263 views

Full outer joins, coalescing, indexes and views

I have two tables, let's call them TableA and TableB. TableA TableB ------ ------ ID ID Date Date Foo Bar Both tables ...
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3answers
1k views

best practice for 'staging' relation in stored procedure: use temp table, or view?

When I write stored procedures that take relation A and output relation Z, I like to create 'staging' relations along the way, so I can inspect the state of the data after each step in the programming ...
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2answers
1k views

MySQL views and table locking (5.1 MyISAM)

I have a large (160 million rows, 50GB) table in MySQL 5.1 using MyISAM. If I were to construct a view defined by a fairly complicated query, would a SELECT on the view lock the underlying table?
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1answer
69 views

Is deriving a value using multiple joins a good idea? [closed]

I am working on a university project. I need to create a database from conceptual to implementation. That allows customers to create an order with multiple products the specification says that we ...
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3answers
4k views

Running an “ORDER BY CASE” query on MySQL view breaks it afterwards

Whenever I create a MySQL view and then run a query ordering the results with ORDER BY CASE WHEN (...), the view becomes unusable. The newly created view works properly and all SQL is correct. This ...
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1answer
4k views

Optimize command issuing “'View is not base table” and “Corrupt” error messages

I have no experience with MySQL. My boss ran an optimize against a MySQL database. Against a bunch of views we got the message "tablexyz" is not BASE TABLE and the next has message is ...
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1answer
170 views

How should row-specific metadata be created handled for an outer join view?

I have two tables, a large (millions) table of Tickets for orders, and a small (hundreds of thousands) table for Invoices metadata on a subset of those tickets. The metadata is information about when ...
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2answers
1k views

SQL Server 2000: Can't DROP VIEW?

I have SQL Server 2000. I want to clean it by dropping obsolete and unused objects. One of the views causes me an error. I try to give more information but I still have no clue what the cause is. ...
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1answer
51 views

Creating a view with a Left Outer Join and Where Condition

Let's say I have a User Table and a User Record table which lists Data Sources associated with that User. I want to create a (Sql Server) View that lists all the contents of a User, and an optional ...
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1answer
34 views

DB2 - cannot invalidate a view

I work on something and I need to check some views. I use this code: SELECT SUBSTR(T.TABNAME,1,32) AS TABLE, SUBSTR(T.TABSCHEMA,1,32) AS SCHEMA, T.STATUS, T.TYPE FROM SYSCAT.TABLES T WHERE T.TABNAME ...
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1answer
26 views

Insertion Rule on a view

I m using postgres 9.3 and i m trying to insert data to the view objectifsBoutique and and PostgreSQL returns following error(« objectifsboutique » relation is not found). I have to mention that the ...
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2answers
541 views

How to find all schemas where a table has records?

In my Oracle database, I have a number of schemas (users/owners) with similar table structures (about 100 in total). However, some tables are empty in a lot of schemas. Is there a way to find out for ...
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1answer
213 views

View collation are incomplete joins in couchdb

I was trying to create view collations following this tutorial: http://elegantcode.com/2012/02/14/view-collation-in-couchdb/ but I realize that the result was an array with 5 elements with 2 objects ...
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1answer
4k views

How to get performance benefits from a view vs subquery?

I'd like to know how/if anyone has gained significant performance benefits from using views instead of subqueries. I would prefer not to define a specific case, since I'm trying to establish good ...
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2answers
35 views

A query for a latest version of data

MySQL. Let there is a table with fields startdate and kind. Actually in the real problem column named here startdate and kind are in a UNIQUE index, but the case if only startdate (not kind) is ...
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1answer
2k views

View dropped, now shows as table “in use”, can't drop

I have a view on a MySQL/MyISAM setup, then the underlying table had a column dropped, and made that view invalid. I tried dropping the view so I could recreate it, then MySQL said it was a table (...
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2answers
2k views

SQL Server 2008R2 - How to prevent a role from creating or altering views within a database?

I have a situation on SQL Server 2008 R2 where I am trying to prevent users of an AD group from being able to create new views, or alter any existing views, within a particular database. This AD group ...
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1answer
47 views

building a view w/ fields that only contain a certain word

Trying to build a simple SQL query... I have a table filled with "Yes" and "No" I want a view that only shows me records that contain "No" SELECT PhysicalBuild.Name AS Name, PhysicalBuild.Labels ...
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1answer
28 views

Getting Error : [Err] 1615 - Prepared statement needs to be re-prepared with MySQL 5.6.30

Problem/Issue : Getting Error : [Err] 1615 - Prepared statement needs to be re-prepared I have a Stored Procedure which contains a Prepared Statement and a view DROP PROCEDURE IF EXISTS `sampleProc`...
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1answer
84 views

Select query with views crashes with ORA-03113: end-of-file on communication channel

I've installed an application developed on 11g XE in a 11g Enterprise Edition server (Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production) and main SELECT query triggers this: ...