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

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49 views

Performance issue using view vs. direct statement

I have a table with structure similar to this: table values ( id1 int, id2 int, value real, value_at timestamp, constraint primary key (id1,id2,value_at) ) I need to get the "current value" for a ...
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1answer
431 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.
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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 ...
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1answer
44 views

Create Views Quickstart

I have setup a few buckets and now I’d like to create a view but I’m not sure where to start. I have logged in to the web console but the views I have created to not return any results. Also, is it ...
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2answers
184 views

Maintaining permissions on a replicated view after reinitialization

When we were on SQL Server 2005, there was some way that I was able to keep custom permissions on a view at the subscriber. Now that I'm on SQL Server 2012, there doesn't seem to be a way to do that....
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3answers
223 views

Add fields to view from select (transpose fields)

I've got a table with following structure: CREATE TABLE test ( id integer, field character varying, value character varying ); field value ------ ----- field1 value1 field2 ...
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1answer
54 views

Creating a View with results from join of scalar tables

I am really bad at SQL Queries and seem to be stuck at a very odd problem. Maybe there's an alternative of doing this, but I simply can't figure it out. Maybe you guys can help! So, here's my ...
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1answer
3k views

ORA-00942: table or view does not exist while creating synonym

We are using oracle 11g, the db structure goes like this: We have users CST and FAS. CST contains a table ST_CAT2, a public synonym ST_CAT has been created for the table CST.ST_CAT2 as a SYS user. ...
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2answers
109 views

SQL view, how to append results from tableB with the results from tableA

I am using SQL server 2012. I would like to generate a sql view where I got all records from tableA. And below these results I would like to have the results from tableB. There are no relations ...
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1answer
219 views

Huge cross product view query speed

I have a huge view what consists of about 15+ million rows and about 150+ columns. That view is made of a lot of LEFT OUTER JOIN between a master table and various related tables. That master table ...
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1answer
1k views

Postgres - Optimizing an view dependent on an aggregate function?

I have a table of about 15 million records. Whenever information about a specific charge_id is changed, a new row is added with the current timestamp and the changes. This results in multiple rows ...
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2answers
2k views

Determining what algorithm MYSQL View is using

When creating a MySQL View, the algorithm is set to UNDEFINED. How do I see which algorithm MySQL is choosing for the query ? I tried using "EXPLAIN", but it is not obvious from the results what ...
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2answers
296 views

Configure Oracle user in Enterprise Manager to CREATE VIEW on any of his tables

Is it possible to configure an Oracle user in Enterprise Manager, so that he can later create views on any future, yet unknown table in his schema? I am currently running into "ORA-01031 insufficient ...
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941 views

Question about Oracle's interpretation of “host cpu utilization” in v$sysmetric view

I am studying the v$sysmetric view from Oracle and trying to understand what is Oracle's interpretation of "Host CPU Utilization" It says in the metric_unit as % busy/(idle + busy), but what is busy? ...
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1answer
406 views

What is the locking behavior for Updatable/Insertable Views?

Consider I have a View that is merely a simple join between 2 tables, selecting all columns. The View is Updatable and Insertable. What would be the locking behavior when executing an UPDATE or ...
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243 views

What is a good way to query data stored in multiple identical tables split by date/time

I have a 3rd party piece of software which records data samples from industrial equipment. This data logging software stores data in sample data tables with approximately one day's worth of samples ...
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1answer
771 views

View metadata refresh in MySQL

Like other RDBMS, view meta data is stored at view creation time. From CREATE VIEW in the MySQL docs The view definition is “frozen” at creation time, so changes to the underlying tables ...
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2answers
2k views

Allow db_owner to add/view existing logins to database

On our development server (SQL 2008 R2) we want local dbo's to be able to add existing logins on the server to the database. The problem is they can't view them, they can only see themselves in the ...
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31 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: ...
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22 views

Views dependent on other views [duplicate]

Is it bad practice to have views dependent on other views? If one dependency doesn't affect performance, at what level of dependency will it start showing negative effects? In the picture is an ...
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21 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 ...
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1answer
33 views

Is it possible to write a select * view that includes new columns added to table?

I would like to write a view that is essentially something simple select a + b, * from table_name and will always truly include all columns in table_name, even when I add or remove them. If I do the ...
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0answers
58 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 ...
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63 views

Can't create a view for other user's table despite having select privilege

I already executed the following commands: grant create view to scott; conn hr/hr; grant select on employees to scott; but: create or replace view company_phone_book as select employee_id emp_id, ...
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64 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 ...
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89 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 ...
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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 ...
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182 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. ...
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1answer
136 views

ER Diagram - View Intergration/Centralised approach

Could anyone enlighten me on the difference between a view integration and centralised approach when designing a database, and how the ER diagram can be used to illustrate upon this; can't seem to ...
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69 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 ...
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1answer
872 views

Slow max, min query in Postgresql View

I have a view and it's a left join between two tables (table_a has hundreds of millions of rows, table_b has ~2 millions). The query SELECT MIN("id") AS "min_id",MAX("id") AS "max_id" FROM "the_view" ...
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1answer
89 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 ...
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2answers
50 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 ...
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110 views

Tools and techniques for untangling monster views (nested views)

First a bit of context (venting). I'm working with a new vendor product which is really nothing more than a SQL Server database with a .NET interface. First few weeks with this client and users are ...
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2k 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 ...
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1answer
1k views

Oracle views not using indexes [closed]

I am experiencing the unexplainable - at least to me. I have some tables in my production database which have some indexes on. We then have a number of views which merge the data across tables to ...
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2answers
65 views

Slow Select over View

My simple SELECT statement on a view in Postgres 9.3.1 is pretty slow. The receipts table has 20 million entries and the other one has around 17k. But I still think it should be faster than ~16 ...
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1answer
70 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 ...
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1answer
50 views

SQL Server : View names

I'm coming from an Oracle background and came across code to create a SQL Server view which I've never seen before. We have a view called viewA (for example) Within the script to generate the view I ...
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1answer
81 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 ...
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2answers
5k views

Hide column if any value is null or zero via proc sql or view [closed]

Given either of the two following datasets Kağıt Cinsi Sarı Yeşil Mavi Kalın 4 0 5 İnce null 0 3 or Kağıt Cinsi ...
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1answer
1k views

Retrieving a fixed range of rows from Postgresql

I have a query: select qid,ansid,ans from table1 where askerid='something' This query can retrieve many rows. But I want to display only 50 rows at a time and then if the user clicks on more, the ...
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2answers
36 views

Database view listing distinct days

I have a list of sensors of many machines, that stores on a second base (i.e., 86400 records each day for each machine). One of the many columns is the datetime of the value (that can also be stored ...
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1answer
107 views

How many LEFT JOINS make a VIEW unusable?

I have a view which involves LEFT JOINS on 20+ tables to a base table but when querying this view and looking at the execution plans I am getting something totally unexpected. For example, with the ...
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1answer
161 views

Why is it not possible to alter a view with a “CREATE OR REPLACE”?

The Postgresql documentation is clear on this point: you can not change the columns of an existing view. The new query must generate the same columns that were generated by the existing view query ...
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1answer
107 views

How to grant select on a view … based on IP adress?

I wonder if it's possible to allow a client A to "see" some data in a view while allowing any other clients, namely B and C, to see ALL data from the same view. The distinction between A, B and C ...
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1answer
20 views

Hide column values for some rows in auto-updatable views while retaining the “write” capability for them in PostgreSQL

Suppose i have a view defined like this create or replace view clients as select id, name, case app_user_type() -- hide column content for everyone except the administrator when ...
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2answers
93 views

How to create a VIEW in SQL Server [closed]

I have a user table and I need to create a VIEW so a user can only see their own data/row. How could I achieve this? I have been searching online but I can't find anything useful User with user_id, ...
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96 views

PostgreSQL : inconsistent result when using WHERE clause on VIEW

This is my VIEW declaration CREATE OR REPLACE VIEW inv_groups_vw AS SELECT gg.id, gg.sku, gg.name, gg.description, CASE WHEN count(i.*) = 0 THEN '[]'::json ...
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1answer
397 views

MySQL pivot table via a view

Suppose the following schema CREATE TABLE `log_apache` ( `date` datetime NOT NULL, `count` int(10) unsigned NOT NULL, `input` bigint(20) unsigned NOT NULL, `output` bigint(20) unsigned NOT ...