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

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3k 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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592 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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1answer
541 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
87 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
49 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
71 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
49 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
137 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 ...
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31 views

About creating a View With additional coumns (that are not in the table)

I have this view with following definition. create view VIEW_IRS1 as Select MBR.PRSN_MBRSH_ID , Atr.Ssn_Tx , Names.First_Na , Names.Middle_Na , Names.Last_Na , Reff.Ref_Cd_Desc_Tx Suffix_Na ,'FALSE' ...
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2answers
38 views

Aggregating results of two database views in one database view

I have a view with name of UserInfo like this: And another view with name of UserRoleInfo like this: I want to aggregate all the records of the two views for one user name like H.F into ...
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2answers
84 views

Does Postgres support stored column labels that can be queried?

I'm not a DBA but seem to recall that there was a SQL database that stored column labels (preferred column headings that can be printed on reports). Does Postgres support labels such as these?
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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 ...
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252 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, ...
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2answers
843 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
19 views

How can I aggregate multiple results from another table using something like BOOL_AND?

I'm using PostgreSQL as my database. CREATE TABLE users ( id SERIAL NOT NULL, name TEXT NOT NULL, PRIMARY KEY (id), UNIQUE (name) ); CREATE TABLE groups ( id ...
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1answer
28 views

How can I create a bool column for a view based on the result of a statement?

I'm using PostgreSQL as my database. CREATE TABLE groups ( id SERIAL NOT NULL, name TEXT NOT NULL, PRIMARY KEY (id), UNIQUE (name) ); CREATE TABLE users ( id ...
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1answer
24 views

Selecting row multiple times, as specified by a field in that row

As part of an redesign, there's need for an different schema in one of the main tables in our database. The data in one of the existing tables will be kept as legacy data. To make the changeover ...
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1answer
43 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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1answer
22 views

Collate view with old record on couchdb

I need to create a collate view with couch db but I dont want to use the current records, I want to use records of a specific revision. For example, lets imagine that I have an invoice with an array ...
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1answer
27 views

whether to merge partitioned table with only partially overlapping columns

I opted for MonetDB for my static data, but this might be less of a MonetDB-specific question about features than about RDBMS (or just SQL) in general. I have data with a few "cross-sectional" ...
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1answer
199 views

MySQL query using left join on two inline views not returning rows without values in second view

For some reason when I execute the code below I'm only getting results back that have sku in both views. I thought this should give me everything in the first view and add the content from the second ...
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1answer
176 views

Attributes from an hstore-column as separate columns in a view?

Let's assume we have a table where it has two columns, one an ID and one an hstore column, which stores key/value pairs. You could query that column as such: SELECT name, attributes->'device' as ...
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2answers
735 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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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 ...
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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 ...
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2answers
211 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 ...
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1answer
356 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 ...
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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: ...
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1answer
4k 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'@'%') ...
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1answer
37 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 ...
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1answer
50 views

viewing Original Object under synonyms

I have certain synonyms in my schema which represent views from another schema. Now in oracle sqldeveloper, I am unable to see the actual SQL for those views but I see only an SQL like: CREATE OR ...
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1answer
394 views

Combining a tree structured Group model with its HABTM User model in one VIEW

I have a tree structured model Group which has the columns id, parent_id, name, lft and rght. I also have a model User which has the columns id, name and password. Group and User have a ...
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1answer
20 views

Best way to create materialized view in mysql

I am using mysql 5.6, I am not being able to create materialized view here like oracle. I got one or two solution like flexview and all... Can anybody tell me best way to create materialized view in ...
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55 views

SQL Server 2008 R2: After Insert Trigger and Query returning unexpected results for a split second

I am having trouble with an After Insert trigger and a query running right afterwards. The query goes and finds the most current record in each table by using OUTER APPLY with a table-valued ...
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0answers
21 views

Slow queries while using views in MySQL

We have MyISAM tables on MySQL 5.5 and there is this select * from theView where serial_number = 'QWE12345' or select * from theView where user_id = 1234 kind of queries when searching. When I ...
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1answer
16 views

create insertion rule on view returning id

I have a table private.products and a view public.products representing that table. And I want to create entries in private.products while inserting into view, it all works right, except that I also ...
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0answers
36 views

Query on a SQL Server view with openquery to Hive returning wrong answer

I have a view in a SQL Server instance which is running an OPENQUERY to Hive through MS OLE DB Provider. The view is getting all the records from the Hive table without any WHERE clause. Now, I ...
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23 views

Recursive view for dynamic tree in MySql

Lets assume that there is a factory that produces products. the factory have catalog of a products, therefore tbl_catalog will be. ...
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59 views

Performance of VIEWs with UNIONs in different databases

For various corporate and historical and replicating reasons, I have multiple databases that contain similar-structured tables, holding the main production data used as a source for other home-made ...
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56 views

SQL Server: efficient query with (double) linked servers

I am DBA of server A (SQL Server 2008R2), linked to server B (SQL Server 2012SP1), linked to server C (not sure which version). I have no control on server C, and I cannot contact its DBA. On server ...
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223 views

MySQL: #126 - Incorrect key file for table '/tmp/#sql_9dc_1.MYI'; try to repair it

I've been reading possible solutions to this problem but until this time, those solutions don't work with my case. Activity: In phpMyAdmin, the following error pops up while opening a View. Error: ...
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64 views

Create separate temporary table/view and variables for every query

How can I create something similar to VIEW or TEMPORARY TABLE for every query separately? I have 1 process, it creates and holds one connection (doesn't destroy connection after request, so doesn't ...
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17 views

MySQL Replication problem with VIEWS and “Sub-Databases”

I've got three servers that should do a master-master replication. On server 1 i got "01_maindb" which holds the master tables. I replicate this table to the two other servers without problems. ...
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1answer
39 views

Combining data of multiple rows in view

I have a table that holds timetracking data of users and looks somewhat like this: projectid activityid worklocationid year week day hours 1 22 21 2014 37 ...
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61 views

What is the cost to create Materialized View log

Recently I ran DBMS_ADVISOR.TUNE_MVIEW and it gives me several lines to CREATE MATERIALIZED VIEW LOG ON "MYSCHEMA"."COMPANY" WITH ROWID CREATE MATERIALIZED VIEW LOG ON "MYSCHEMA"."BOARD" WITH ...
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17 views

Get tp.address_from and tp.address_to from travel_point table

I'm building a view for get tp.address_from and tp.address_to but I can't get this works. This is the query I'm working on: SELECT `tp`.`address_from` AS `address_from`, `tp`.`address_to` AS ...
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20 views

What is the optimal way to get a tabular view from an Entity-Attribute-Model table?

Following up on my previous question, I have created a table for storing measurements of different physical quantities. The schema looks like this: CREATE TABLE sensorreadings ( time TIMESTAMP, ...
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2answers
34 views

primary_key problem in MySql view

I have 3 tables. and I want to create a view. There is no problem about generating SQL qeury and creating a view. but when I want to use this view in my web app it says me (LIKE THIS): "your view's ...
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1answer
59 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
167 views

Best Practice For Data Views with Linked Server in SQL Server

In SQL Server, I have to design a View that I can map on a DBML file in order to dynamically retrieve information from the database with multiple conditions to filter. The problem is that I have to ...