Questions tagged [view]
A virtual table that represents the data in one or more tables in an alternative way.
651
questions
0
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227
views
Oracle 12cR2 - How To Create DDL Script Of A View With All Dependencies and Permissions
I have a view in my production database and I want to create same view in my test database.
I tried this commmand:
select dbms_metadata.get_ddl('VIEW','VIEW_NAME','VIEW_OWNER') from dual;
It ...
- 55
1
vote
2
answers
617
views
Creating an Index based on Execution Plan
I've been rewriting a view that was performing poorly - it had 28 LEFT JOINs to another view and I have managed to modify this to a single LEFT JOIN and we are seeing a pretty good improvement in the ...
- 205
-2
votes
1
answer
38
views
Oracle View inside an SQL Server Instance?
I have an Oracle View (in an Oracle database). I am moving to a new project that uses SQL Server but this view contains data that I need access to.
Is there a way (other than dumping data then copying ...
- 176
-1
votes
1
answer
1k
views
How are database views executed?
Lets assume there is a design where every table is represented by a view, that is simply selecting all of the columns of the table and all the rows.
--vw
Select * From sys_table
And I then run a ...
- 35
1
vote
0
answers
1k
views
Cannot DROP/ALTER a VIEW because other objects depend on it
I need to ALTER a VIEW in order to add an additional field but I am unable to alter/drop it because other objects (several functions and views) depend on it. Is there any way to alter the view without ...
- 31
5
votes
1
answer
823
views
Cannot use "ON CONFLICT" with postgres updatable view and partial index
I have an updatable view pointing to an underlying table that has a partial index. It looks something like this
CREATE TABLE if not exists foo (
a INT,
b INT,
x INT,
y INT,
z ...
- 101
0
votes
1
answer
67
views
SQL Server 2008 - Replacing csv substrings in view-row using data from other table
Using SQL server 2008, is there a way to perform SELECT query in a view replaces a row containing comma-separated values with their corresponding text value from another table? STRING_SPLIT and ...
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0
votes
1
answer
861
views
Direct, simple SQL query results in "ORA-01406: fetched column value was truncated"
All the information I've seen on this issue is always in regards to running a query via some other utility (e.g. TOAD); however, I am seeing this issue when I simply try to select * from v$asm_disk; ...
1
vote
1
answer
73
views
Normalize SQL to the same format
I want to write a package that will manage mysql/pgsql views, but for that I need to check if the view defined in the code is the same as the view in the database which I get with show create table ...
- 123
4
votes
1
answer
4k
views
MySQL - Joining table with different charset in a view
I want to join tables from two different schemas. But the problem is both schemas follow different charset utf8_general_ci & utf8mb4_unicode_ci.
When i do a join on both tables, it works. But, ...
- 157
0
votes
1
answer
29
views
Triggers or views on frequently updating table
We have a table which is frequently updating. We have a scheduler to update this table which runs every 10 minutes. There are not more than 50k records in this table but when scheduler runs, database ...
- 117
1
vote
1
answer
58
views
Is there anything wrong with splitting a complicated view into many small ones?
I have a view where each row is associated with a customer, and the columns are various computed values such as life_time_value and purchases_per_week, as well as more complicated statistical values ...
- 179
1
vote
1
answer
172
views
Create a key-preserved view across Oracle tables with descending indexes
I'm trying to create an updatable view between two Oracle tables which have exactly the same key structure. The existing tables are created by an ERP system and:
Do not have primary keys - only a ...
- 113
1
vote
1
answer
383
views
Recursive Parent-Child Location Relationship Cache as View
Here is my data structure:
CREATE TABLE Locations(
LocID int IDENTITY(1,1) NOT NULL,
LocationTypeID int NOT NULL,
ParentID int NULL,
LocNum varchar(50) NULL,
LocName varchar(250) ...
- 115
1
vote
1
answer
66
views
Adding one record from master-table in addition to other records from detail-table to a MySQL-View
I am facing a problem creating a MySQL-View. I am not really a pro and i have no clue how to make this work. The situation is the following:
I´ve got a table "Customers" (Master) with all the costumer ...
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0
votes
1
answer
53
views
views restored from backup in a different server referring to linked servers
I have 3 SQL servers X, Y, Z and 2 databases X.A and Y.B.
There are (many) view in X.A that uses 4-level naming in their definition:
SELECT ... FROM Y.B.SCHEMA.TABLE
From this I infer that X ...
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1
vote
1
answer
1k
views
Full text search with json field in SQLite
Is it possible to have full text search in SQLite along using json?
In SQLite json is stored as TEXT (JSON1).
Full text search requires creation of virtual table (full text) but I don't know how to ...
-2
votes
1
answer
225
views
Oracle Delete From a View [duplicate]
I need to compile below query:
delete from dba_audit_trail where TIMESTAMP > SYSDATE - 30;
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1
vote
1
answer
557
views
MySQL - view select rooms not in booking range
I'm using a select query within a view to find when a room is available, a booking is identified with a reference and a start/end date.
view:
USE CATTERY2;
CREATE VIEW RoomAvalability
AS
SELECT ...
-1
votes
1
answer
4k
views
Use a temp table's result in a view [closed]
I am using a temp table in a stored procedure.
I need to use that temp table's result in my view.
How can I do that?
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1
vote
1
answer
212
views
Insert into indexed view?
I give an example to show my problem.
I create 2 table as the following:
CREATE TABLE a
(
id INT
)
CREATE TABLE b
(
name NVARCHAR(10),
id INT
)
Then insert data into these tables
...
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0
votes
2
answers
732
views
how to view data as history of field value change
Example
i have data like
id employeeId Salary Year
1 1 12000 2001
1 2 10000 2001
1 1 16000 2002
1 3 12000 2004
1 ...
0
votes
1
answer
842
views
Querying 500 million records in Oracle view takes forever
I really need professionals help now after wasting a week of time to solve my problem and searching on Stack Overflow. I have a view created on top of two different tables. This view has 500 million ...
4
votes
2
answers
342
views
Why is the result of a totally deterministic and all-encompassing "case" in select query in view nullable?
I have a table, with Id as the primary key.
create table Anything
(
Id bigint not null primary key identity(1, 1)
)
When I look at this table in Object Explorer, I see this image of course:
As ...
- 1,417
1
vote
1
answer
59
views
Are there any unforseen down sides to using views to abstract away from cryptic table names?
We have to report against a very large and complex vendors HR/Payroll database which has cryptic table names such as A100M, C755V, X50AA etc.
In order to make writing queries more human friendly, I ...
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1
vote
1
answer
427
views
What is the rationale of dropping all indexes for an altered view in SQL Server?
This is a follow up of ALTER VIEW drops Index from View question.
The accepted response indicates that ALTER VIEW will automatically drop any defined indexes.
This is somewhat counter intuitive to ...
- 1,261
13
votes
2
answers
1k
views
ALTER VIEW drops Index from View
as the header line suggests: Using an ALTER VIEW statement on a VIEW that has an index on it will drop this (all?) indexes from the VIEW without warning. I would prefer the ALTER VIEW statement to ...
- 233
1
vote
1
answer
832
views
Select * from View is taking a SUPER long time [closed]
I have created a view which gets data from 5 tables, 3 of them containing 200k+ rows,340k+ rows and 2.1mill+ rows.
The view contains group by clause, case statements and CTEs.
When I do a simple ...
1
vote
1
answer
652
views
Create a view with distributed Lobs
I have two Oracle 18c instances (instance 1 with schema DB1 and instance 2 with schema DB2) and I know that there ist a support for distributed lobs since 12.2. So i did the following:
CREATE TABLE ...
- 113
-1
votes
1
answer
60
views
How can I select non null columns from a view of EAV tables
I have a VIEW that queries my E-A-V model which uses datatype tables to store the values. I have an entity that contains many attributes, each attribute can be a different datatype. The DataType ...
- 167
1
vote
1
answer
285
views
Modelling a user-defined filter set in SQL
In my database I have a table containing data that I need to filter. The exact contents of this table aren't important so I'll just call it data.
Now, my users also need to be able to create filter ...
- 258
1
vote
1
answer
5k
views
Postgres: How can I force index usage for view with latest rates?
We import currency rates into DB:
CREATE TABLE currency_rate (
id int8 NOT NULL,
date date NOT NULL,
currency varchar(3) NOT NULL,
rate numeric(12,6) NOT NULL,
CONSTRAINT ...
- 499
0
votes
1
answer
67
views
Sql Server view with very limited access
I have a requirement to limit a view in Sql Server 2008 R2 that user:
user has access to select from view.
user has not access to copy the result from select statement.
user has not access to join ...
0
votes
1
answer
45
views
Order database view in new columns
I've created a view from a table in SQL Server which cannot be altered in any way. The purpose is to make the fairly complex table conceivable for the users.
The view consists of several columns ...
0
votes
1
answer
31
views
Optimizing the repeated use of the same if condition inside a VIEW?
CREATE OR REPLACE VIEW VIEW_NAME AS (
SELECT
table0.fieldBlah "FieldBlah",
--more fields
IF(table1.foo or table2.foo IN ('State1', 'State2'), 0, table3.uniqueField) "uniqueFieldName")
...
- 111
31
votes
4
answers
5k
views
Does SQL Server Only Perform Calculations In A SELECT List Once?
Take the following example:
SELECT <CalculationA> As ColA,
<CalculationB> As ColB,
<CalculationA> + <CalculationB> As ColC
FROM TableA
Would CalculationA and ...
- 421
1
vote
1
answer
53
views
Only join to latest entry in subselect in a given range determined by the main select
I have one table Haul and one table ChargeCarrier_Storage. The latter contains movements of charge carriers between storage locations. Haul has an arrival and a departure time. I want to join together ...
- 193
1
vote
1
answer
4k
views
MYSQL - How to optimize VIEW performance?
Total profiles - 100000
Each profile is connected to one or more platform
Each profile have 50 Tags
Each profile have 4 themes
I have a user view (total users around 100000) where I am joining all ...
- 391
0
votes
1
answer
76
views
Get notification about invalid views
I have 40 views that are integrated/synced to a work order management system on a weekly basis.
The views are based on GIS tables which are notoriously messy. Over time, the views can end up becoming ...
- 1,447
0
votes
0
answers
158
views
ORACLE MULTIPLE TABLE INDEXES ON GROUP BY
I have a VIEW with multiple tables, it has a group by statement containing multiple columns from each table. The problem is access to the view takes 4,5 seconds and ideally should take less than 1.
...
2
votes
1
answer
426
views
SQL SERVER: Find and Drop Invalid View
I have a SQL Server 2012 database which contains a number of views which have become invalid. The underlying tables the views referenced were migrated to another schema for archiving. What's the best ...
- 437
8
votes
3
answers
8k
views
Manipulating a Column Containing Key/Value Pairs
I'm accessing and creating reports from a vendor via a replicated SQL Server database. They've done some absolutely insane things that I've been trying to solve for, but this one takes the cake.
...
- 193
1
vote
1
answer
66
views
Creating a view that calculates percentages
I have this table getting populated with top10 destination ports every ten minutes along with a "total" entry that records the total number of bytes and packets transmitted for each port for the time ...
- 11
0
votes
1
answer
77
views
split big table into two joined view
i have a big postgres db with single table for product and attribute but i want two view of one with product and one with attribute.
for example now i have
tb_products
iditem | name | attributes
---...
- 5
2
votes
1
answer
136
views
Creating a view (or table) from JSON data with two different shapes
I'm pulling in JSON data from two different sources that have roughly the same information, but in different shapes. Let's say I'm pulling in data about music albums, and one of the API responses ...
- 123
1
vote
2
answers
178
views
Improving the queries in a view to query custom types
I'll spare you the details, but I've got a situation where I'm going to be creating and managing a lot of custom types. (Postgres 11.4, ultimate deployment under RDS.) It looks like there isn't a ...
- 859
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votes
1
answer
70
views
How to create a VIEW when Table1 is having relation to Table2 on several of it's fields?
My situation (greatly simplified) is as follows:
Table1
ID
Name
Ver1
Ver2
Ver3
Ver4
Table2
ID
Name
...
This table holds the versions
The columns Ver1 - Ver4 are foreign keys and are IDs of ...
- 109
0
votes
1
answer
95
views
Optimize a postgresql database view query
Given the following database schema (using rails-like associations, as this is a ruby-on-rails project, also please forgive me for how I phrase this for I am new to this forum):
Client has_many Deals ...
- 101
0
votes
1
answer
3k
views
Entity Framework 6: How can I add new column to existing table and at the same time update view (add column) in same migration file [closed]
Example in the EF6 migration file Up method.
I wish to add a new column B in existing table Country.
Sql("ALTER TABLE [dbo].[Country]
ADD [B] INT DEFAULT((0)) NOT NULL;")
Then I will need to ...
1
vote
1
answer
85
views
SQL Server 2016 - Disparity Between View Definition and View Design
I've run into an interesting issue with some databases I've inherited, and could use some help unpacking it all.
The Issue
After adding a column to a table, views selecting * from that table are now ...
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