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

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1
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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 ...
2
votes
1answer
30 views

Turn off auto qualification of table names when creating a view

Problem Definition I am trying to modified a shared development database, for a dev team to use for application development/testing. Most of the collective work (table names, views, etc) are stored ...
10
votes
5answers
699 views

Why does this UPDATE fail with a unique key constraint violation?

I'm an "accidental" DBA, relatively inexperienced and baffled by this problem. Running MS SQL Server 2012. The problem is with this UPDATE statement: UPDATE dbo.tAccts SET Ticket ...
1
vote
0answers
65 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 ...
3
votes
1answer
152 views

Bad performance with select on view if check for 'is null'

I have two quite simple tables, and a view to join them on bigint fields: CREATE TABLE foo.ao ( id serial NOT NULL, ao_id bigint NOT NULL, ao_plz text, ao_community text, ao_street text, ...
6
votes
1answer
277 views

Running out of disk space running MySQL query

I have been trying to create a "gaps and islands" identification routine in MySQL. See the previous question regarding setup here and computational resources required here. I increased the RAM of the ...
0
votes
0answers
72 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? ...
0
votes
2answers
141 views

Create View For All Table Names Listed In Table

I know this data structure is morbidly incorrect, but I am playing with the cards I have been dealt as I can not go back and re-write the structure. I have a table that holds table names, I need to ...
2
votes
2answers
68 views

Update a table after insertion to another table in PostgreSQL?

Let's say that my database has 2 tables (Person & Car): Person (personID, number_of_cars) Car (carID, owner) where the owner attribute in Car refers to the personID in the Person table. Now, ...
2
votes
2answers
482 views

Teradata view with “With Clause” syntax

I am trying to a view with "With" clause in Teradata but it is not allowing to create a view. Please suggest with any options. Given below is the query which I have tried: create view derived_table(...
0
votes
1answer
61 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 ...
2
votes
0answers
151 views

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. ...
2
votes
1answer
334 views

Encryption/Decryption with StoredProcedure/View

I'm working on a project that uses EntityFramework for programmers to access the data. We've recently found need to add fields that were determined that need to be encrypted. This will be the first ...
1
vote
0answers
90 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 ...
-2
votes
1answer
78 views

Create a view for different attributes from different tables

I have three tables: product(pid,name,category,maker-cid) purchase(buyer-ssn,seller-ssn,quantity,pid) person(ssn,name,phone number,city) How can I create a view to expose only the Buyer name, ...
0
votes
1answer
94 views

Are there issues with using SELECT * in a view definition?

I am creating a number of proxy views for views in a separate database. To avoid defining the view in two places, I want to use SELECT * to create the proxy view. I've searched for reasons not to do ...
0
votes
0answers
10 views

is there a way to see statistics on when and how often a view is being used in SQL Server? [duplicate]

I was recently handed a request to produce a report on all the views in a given database along with an indication of how frequently they are used, presumably so that the developers can remove views ...
0
votes
1answer
126 views

SQL database ODBC connection Multi-part identifier could not be bound

We're using PADS Professional xDX Designer (from MentorGraphics) with a SQL parts database connected through ODBC using views. All seems to be working just fine, except for our Inductor parts where ...
0
votes
0answers
18 views

MySQL View cannot be executed via shell command

I have a PHP script (CakePHP framework) that makes this call $data_reports = Cache::read('get_data_reports', 'short'); if (!$data_reports) { $data_reports = $this->paginate('DataReport'); ...
0
votes
0answers
35 views

I currently have a stored procedure that contains 5 joins, would it be more efficient to implement it as a view?

My current stored procedure is badly written and needs to be refactored. I've managed to find the time to do that. This procedure will be called every two minutes or so, and as more products are sold ...
1
vote
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 ...
-1
votes
1answer
61 views

Cannot UPDATE a view that uses a join

create view drums as select emp.sno,emp.name,emps.sal,emps.deptno from emplys emp inner join employees emps on emp.sno=emps.sno where emp.deptno<5; when I use this update drum set ...
7
votes
2answers
1k views

Why is a NOT NULL computed column considered nullable in a view?

I have a table: CREATE TABLE [dbo].[Realty]( [Id] [int] IDENTITY(1,1) NOT NULL, [RankingBonus] [int] NOT NULL, [Ranking] AS ([Id]+[RankingBonus]) PERSISTED NOT NULL .... ) And a ...
2
votes
0answers
44 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 ...
0
votes
0answers
58 views

stored procedure to display error messages & success when a sp_refreshview is ran

How can I convert this stored procedure to display error messages when a sp_refreshview fails? I need to know which view failed. I would also like to know which "database_name.SQL_View_object_name" ...
0
votes
1answer
143 views

MySQL views performance for alias purposes

So I'm working on a Rails project and I have a legacy database, that is used by other applications, hence its structure cannot be modified. The problem is that table and column names do not follow the ...
4
votes
1answer
166 views

Performance problems with TOP and user defined functions in views

I have problem with performance of queries on simple query on view. To keep things simple, assume my view is defined as follows: CREATE VIEW [mon].[ViewDevicesWithGroups] AS SELECT Id, Name, ...
8
votes
2answers
352 views

Tracking current user through views and triggers in PostgreSQL

I have a PostgreSQL (9.4) database that limits access to records depending upon the current user, and tracks changes made by the user. This is achieved through views and triggers, and for the most ...
2
votes
2answers
433 views

Why the WHERE clause is not pushed down in the view's query?

With Postgres 9.4, I'm doing the following query quite often: SELECT DISTINCT ON(recipient) * FROM messages LEFT JOIN identities ON messages.recipient = identities.name WHERE timestamp BETWEEN timeA ...
3
votes
2answers
1k views

Use a view to join tables or a stored procedure for a better execution plan?

First let me state I am a C# developer, not a SQL Server DBA, so please excuse my ignorance on SQL Server database query execution plans. What I want to know is for a stored procedure which the ...
0
votes
1answer
127 views

Missing view privileges in USER_TAB_PRIVS

I can't figure out how to view the grant privileges I've given users on views -- FIRSTUSER@SQL> create view remotetabletest 2 as select * from A_TABLE where PKEY = '123456' 3 / FIRSTUSER@...
-2
votes
1answer
41 views

when adding a table to my dbo.view I don't get the entire view

here is the code for my view that calls all rows from the tables: SELECT dbo.Purchase_Order.Purchase_Order_ID, dbo.Purchase_Order.Purchase_Order_Number, dbo.Purchase_Order.Purchase_Order_Date, dbo....
2
votes
1answer
137 views

Tracking down unused Views and Stored Procedures

I am working on a SQL Server 2005 database that has two Microsoft Access ADP frontends. This database needs a lot of love and attention which I am attempting to give it. There are lots of stored ...
1
vote
1answer
71 views

MYSQL View with LEFT JOIN return all possible combinations

I am working on a view that joins multiple table. The data will be entered on separate table based on RepairID. The view will gather the data that is linking to the RepairID. My problem is after I ...
2
votes
1answer
93 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 ...
3
votes
1answer
188 views

How do I make this Postgres view that performs a join updatable?

I've got two tables, products and subscriptions: CREATE TABLE products ( id bigint NOT NULL, title character varying(75), description text, manufacturer_id bigint, created_at ...
2
votes
1answer
982 views

Find substrings within between 2 string fragments

I am trying to populate a view in PostGIS in Postgres 9.0 and in this view I want it to contain a substring based on 2 string positions. See below for my code. CREATE OR REPLACE VIEW vw_actions AS ...
1
vote
1answer
326 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 ?
0
votes
0answers
146 views

Syntax error when creating SCHEMABINDING view

I am trying to implement full text search in laravel 4, with mysql database. To implement full text search I need to create indexed view. When I am trying to create view with schemabinding i am ...
0
votes
1answer
101 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 ...
2
votes
1answer
64 views

How to use a view to span two tables that are identical

We have table A that receives data from our shop floor and we currently have it so that the data is moved from table A to table B after 5 years. I want to streamline this but need help creating a view....
0
votes
0answers
140 views

Select sub columns from a view

I have a large view in Sql Server named ViewA which looks like Select ColumnA, ColumnB, ... ColumnZ FROM TableA Join TableB ON ... Join TableZ ON This view gives me exactly what I need in ...
2
votes
1answer
374 views

How to check/know the highest run queries

I would like to gather statistics on the highest run queries in my database. For that I need to know how I can track queries so I can create views or materialized views to cache the results of the ...
0
votes
1answer
14 views

Couchbase Ghost entry - Have it in view, not in data itself

I have a 4 server setup. In them I have a view like this: function (doc, meta) { if(meta.type == "json") { if(doc.type && doc.type == "saveDocument") { emit(meta.id, ...
2
votes
1answer
1k views

Indexed VIEW in SQL Server with PIVOT

A simplified version of my problem is as follows: I have three tables Records, Inputs, and Outputs. Records Id DTS   1  2015-01-01 00:00 ... Inputs Id RecordId ...
3
votes
0answers
47 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 ...
0
votes
0answers
29 views

Filesort when using view

I am sorry for asking, but I can't figure what i am doing wrong and filesort appears in my explain. The id column that I use for sorting in the following examples is a primary key... If I create view:...
0
votes
1answer
207 views

PostgreSQL: a Login Role which can select from any Views

I need to write a SQL file which must do the following: create a role called 'selection' grant connect/usage to the current database grant select/execute to all views of all schemas (or at least on ...
1
vote
1answer
496 views

how to give access to view only one database to a particular users in sql server 2008

I need to give 5 different users to access one database, hiding other databases. I have tired to give access, i am able to give only one user not for all.
1
vote
1answer
81 views

How to mimic a full outer join using mysql views?

I have all kinds of views in mysql with employee data. I have tried to use methods like this -http://stackoverflow.com/questions/2384298/why-does-mysql-report-a-syntax-error-on-full-outer-join but ...