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

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2
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1answer
790 views

View with parameters in Sybase SQL Anywhere

A view with Sybase engine cannot take parameters. Is there a way to do this?
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2answers
943 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 ...
1
vote
1answer
63 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 ...
0
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3answers
2k 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 ...
1
vote
2answers
151 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 ...
0
votes
1answer
41 views

Migrating database with views trough phpMyAdmin causes error in second host

I'm trying to migrate a database which contains some views and I'm doing trough phpMyAdmin export feature. MySQL version on servers are: Server to migrate: Server version: 5.5.34-0ubuntu0.12.04.1 ...
3
votes
1answer
287 views

Mysql slow select from a view

I would appreciate an approach with this problem, I have a lottery system in mysql, this system receives a lot of transaction per second.. a lot!. I need to check the total amount for each the number ...
0
votes
1answer
1k 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 ...
5
votes
1answer
5k views

Query to compare two subsets of data from the same table?

My problem: I'm trying to compare to subsets of data within one table, and I've got two methods that partially work and one certainty that there's got to be a more correct way to do it. The idea ...
0
votes
1answer
49 views

Best way to display number of overspent projects [closed]

I have the first view displayed as: CREATE VIEW Projects AS SELECT DepartmentName, COUNT(*)NumberOfProjects, OfficeNumber, Phone FROM DEPARTMENT AS D JOIN PROJECT ...
1
vote
2answers
91 views

Fixed database paths in stored procedures/views - is there a smoother way of doing this?

Our developers love to create lots of different stored procedures/views, which extracts data from lots of different databases on different servers. Every time we migrate to a new database server, ...
0
votes
2answers
234 views

CASE Statement - 1st case is being ignored

I have a table (usr_t_user_reg) in which I register all the users of the database. Now I want to create a view (usr_v_user_not_reg) which shows me all the users that I haven't registered yet or users ...
-1
votes
1answer
217 views

Restrict access to rows by usename

In my database i store data of different users (e.g. addresses or invoices) in the corresponding tables. I want to make sure that a logged in user only has access to it's own data in the tables (so ...
2
votes
1answer
889 views

Is there a way to explicitely have a not-null column in a view

If I create a view in Oracle, the column definition's not null characteristic is inherited from the base table: create table tq84_t ( col_1 number, col_2 varchar2(15) not null ); create view ...
3
votes
3answers
290 views

Why set up static data in views vs. using tables in mysql?

I get an LDAP feed nightly. I get it as a text file and dump/create my LDAPALL table. There are roughly 75K employees times about 50 fields. I have the following too: LDAPIMPORTANT - view that ...
0
votes
1answer
388 views

How does security context propagate between schemas within a database?

We have a SQL Server 2008 database that contains two schema's. The owners of these schema's have been granted full SELECT permissions to all tables within each others ownership. I have created a ...
-4
votes
1answer
2k views

Can I create a view against a table on another instance? [closed]

I need to query a table from another SQL Server on a different server but same domain, but I am not sure how I will be able to do it. I tried the solution in this answer but it doesn't work for me as ...
0
votes
3answers
1k views

Space used by databases file through linked server

I need to find out space used by database file for multiple databases through linked server(from one central server to multiple client SQL servers). I created view on client size, for all databases: ...
5
votes
2answers
2k views

Frequency distributions segmented by a field

Some background: I have a sample population data file. Each record in the data file has a frequency weight (FIELD NAME: wgt) indicating how many times the records needs to be replicated to get the ...
1
vote
1answer
2k views

In creating view use SQL Security definer or invoker?

CREATE VIEW syntax is CREATE [OR REPLACE] [ALGORITHM = {UNDEFINED | MERGE | TEMPTABLE}] [DEFINER = { user | CURRENT_USER }] [SQL SECURITY { DEFINER | INVOKER }] VIEW view_name ...
3
votes
2answers
7k views

SQL SERVER - Linked Server and query performance

I have a performance problem related to SQL Server/linked servers/views. I hope you can help me understand what is the best way to do what I want =). I have a database K with 3 linked servers ...
1
vote
1answer
2k 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 ...
4
votes
2answers
112 views

Partitioned Views - Storage of Indexes

I have a single table that contains 4 billions rows that I plan on splitting up in to separate tables for each Quarter of the year. Then I want to create a partitioned view across all tables. At the ...
0
votes
0answers
114 views

Why does mysql show Primary key constraint on a View?

As far as I know views cannot have a primary key. However the result of SELECT FROM KEY_COLUMN_USAGE says differ. PRIMARY | S_MOBILE_ITEM_VIEW | ID | ...
2
votes
2answers
591 views

View column has an 8000 character limit?

In SQL Server 2008 R2 we are using an updateable view to update a varchar(max) column. When we update the column with text and then check the number of characters, it is showing a length of 8000 ...
0
votes
0answers
68 views

Procedure after commit

I have an application which periodically will insert large amounts of data, from that data I build a few materialized views (well emulate by creating a table from a view and replacing it with the ...
0
votes
1answer
6k views

Database user specified as a definer

I have a view in my database. problem is below Error SQL query: SELECT * FROM `lumiin_crm_prod`.`v_contact` LIMIT 1 ; MySQL said: 1449 - The user specified as a definer ('lumicrm'@'%') ...
0
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2answers
31 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 ...
4
votes
1answer
1k views

What is a partitioned view?

What is a partitioned view? I googled but could not get a satisfactory result.
1
vote
3answers
844 views

do MYSQL views occupy physical space?

do MYSQL views occupy physical space? Or in other words, is a MYSQL database limited to a certain number of views?
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votes
1answer
185 views

Odd syntax error when creating view with SCHEMABINDING [closed]

I've been working with SQL Views for a while now, and I recently read that something that I want to do requires that one of my views be created with schemabinding. That sounds fine, but I get a ...
-1
votes
1answer
813 views

How to create view in SQLite using INSERT INTO? [closed]

I'm trying to create view that will summarize data in two tables. Each table have several columns, but they both have NAME and AREA columns. And I want these two columns to be united correspondingly ...
1
vote
1answer
117 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 ...
2
votes
1answer
262 views

Can't query one view from another?

Okay, I'm moving a database from SQL Server (which I already miss) to MySql 5.6. I'm having a problem creating a list of valid dates. In SQL Server I just used CTEs to build up numbers, then months, ...
2
votes
2answers
82 views

View Disc Usage

Is this statement correct? Behind the scenes SQL Server actually stores the data in the view as a physical table which must be updated if any of the data behind the view changes I did some ...
2
votes
1answer
1k views

Can a view affect ALTER TABLE commands?

I provide a database system to a number of customers. The database is installed locally on Oracle. We periodically upgrade the database structure (either adding new fields, renaming old fields, ...
3
votes
1answer
616 views

Indexed view not being used - SQL Server [duplicate]

I've a query with multiple joins which takes long time to return data for one date. I've created an indexed view on the same. I set all the required options appropriately, while creating view and ...
4
votes
1answer
2k views

Join To a @Table Variable is running ineficiently

Alright so I have a report sproc that was running incredibly slow. Customers were complaining that the report would not run so I started investigating exactly where in the sproc the problem was and I ...
0
votes
1answer
40 views

Two dichotomy views of a table, and means to express this as a stored procudure?

There is a table events. Some relatively complex logic determines for each event whether it is archived. Then I need two more views: All archived events and all not archived events. How to express ...
1
vote
1answer
510 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? ...
1
vote
1answer
1k 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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0answers
51 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
1answer
99 views

Is it a best practice to contrast table and dependent view metadata to target which views to refresh?

We have non-indexed views created on vendor tables. When they change table structure or column definitions we run sp_refreshview as needed. What is the viability of a script to contrast the table ...
0
votes
1answer
278 views

Create a VIEW that spans 3 tables

Sorry if the title is not clear - feel free to improve. Here are 3 tables (not all data is relevant to the question): CREATE TABLE `content` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, ...
0
votes
2answers
938 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? ...
4
votes
1answer
330 views

Adding indices to views

I have a table that contains XML data in a varchar type field. This field is used to store data from a variety of different XML schemas some of which are related via a record stored in another table. ...
5
votes
1answer
228 views

Are view references in a query properly called “derived tables” as such?

While answering a question on stackoverflow, I presented a definition of derived tables: A derived table is a complete query, inside of parentheses, that is used as if it were a real table. But ...
0
votes
1answer
74 views

Where can I read about views for MySQL?

I really don't know nothing about SQL.. I know how to insert and select data from database using PHP but besides that, nothing. I found this view And I am sure that 5 minutes for you to answer this ...
5
votes
2answers
993 views

Oracle View Ignoring External WHERE Clause

Good day, This one has me stumped. I have a rather nasty developer query that I would like to store in a non-materialized Oracle view. The text for the view itself is a bit long to list here, but ...
1
vote
1answer
219 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 ...