I am new to access database.
I created a linked table (linked to an excel file)
I them created a local table which is just a filtered table from the linked table. (same table just filtered for some records.)
The issue I am running into is that I am not able to refresh this local filtered table. The steps I am following are :
Refresh linked table using 'linked table manager'
Refresh the local table (filtered version of linked table) using linked table manager and the refresh button in the menu bar.
While my linked table gets refreshed, this filtered table does not get refreshed.
Can someone suggest what I can do?
Thanks in advance
You might want to use a query rather then your local, filtered, table.
If you want to keep your current structure try this
Create -> Query Design -> click on SQL on the bottom right -> paste the following code in
SELECT * INTO local_filtered_table
FROM linked_table
WHERE <put your conditions here>;
Then run this query each time you update your linked table.
Or you can do as Rene suggested and just make a query instead of a local table which would look something like this.
SELECT *
FROM linked_table
WHERE <put your conditions here>;
Related
I am curious if I can insert the data of a table from another connection to a table which i created.
I created the table GPS with the same column-names... etc. in the connection host-abc1.de
and now i want to fill in the data from another table (which also is called GPS and has the same columns, etc.) but this on another connection host-abc2.de
can I do something like this?
INSERT INTO host-abc1.de_NameOfSchema1_GPS, SELECT * FROM host-abc2.de_NameOfSchema2_GPS;
thank you very much for your help
You can create a Linked Server in order to work with data and objects from multiple sources.
The link below gives you detail about how to create a linked server and work with it -
https://learn.microsoft.com/en-us/sql/relational-databases/linked-servers/create-linked-servers-sql-server-database-engine?view=sql-server-ver15
I have a task to do synchronizing view with table in phpmyadmin. As example, I have a view table like this:
VIEW:
TABLE:
the data records of table is same as view. I copy the data from view to table using
CREATE TABLE tablename AS (SELECT * FROM viewname)
I want to synchronize them. As example, when view is updated then table will be updated too. The meaning of view's updating is like editing the view then I import the view again by deleting the old one. Is there any way to do that? I want to synchronize the view and the table because the time took so long when I open the view. So I made table which is same as view so that I'm able to open it faster. Thanks in advance
VIEW in MySQL is a virtual table or logical view of a table as mentioned by Jens that has no data stored on it like a table.
Instead, it fetches the values directly from the table. The values in VIEW changes when the values from the table it fetches changes.
Therefore you will need to sync between the tables and not between view and table.
I have a database in SQLYog - MySql GUI, which on expanding in the treeview viewer, shows all the existing tables, but if you query ,say
show tables from database_name
It shows a table that isn't in the database treeview.
I tried the query
SHOW TABLE STATUS FROM database_name,
and it shows null for all fields associated with the table.
I think the table was deleted sometime ago, but hasn't been erased from the database logs or something. How do I delete this entry, and also, please tell me why this is happening.
Unless your mysql server suffered a crash, that "table" is probably a view and sqlyog lists it under the views.
Mysql documentation on show tables says:
This statement also lists any views in the database. The FULL modifier is supported such that SHOW FULL TABLES displays a second output column. Values for the second column are BASE TABLE for a table and VIEW for a view.
Mysql documentation on show table status says:
For views, all the fields displayed by SHOW TABLE STATUS are NULL except that Name indicates the view name and Comment says view.
Had created a linked table in MS ACCESS 97. Need to remove the link and make the table static so that, even if the data in backend db is removed or altered, this should not affect the table data in MS Access.
Use a "make table" sql query in order to get the data into a local table then you can delete your linked table, SQL something like:
SELECT * INTO LocalTable FROM LinkedTable
A few months ago I created a VIEW that gives me last month's transactions. I use that view within other queries. The problem is, I changed some table names of tables that are referenced inside the VIEW and have broken the VIEW query in the process. Now my other queries don't execute anymore.
Is there any way to see what the VIEW statement is and edit it to reflect the new table names? I'm using phpmyadmin, but everytime I try to go to the view table, it gives me an error saying it is invalid, but it won't show me what it is...
Providing you know the name of the view you can run this and it'll show you the query that creates the view. If phpMyAdmin doesn't let you run it, then you will probably have to do it at the command line.
SHOW CREATE VIEW view_name
You should also that it says something like:
SQL SECURITY DEFINER VIEW `myViewName` AS
Directly after that you will find the query that creates this view. Copy and paste it into a text editor and you can alter it so it works with your new table names.
Run it as a normal query to ensure it works, then when you're ready to replace it with the broken original you can run this query (beware this will delete the original view!):
DROP VIEW IF EXISTS myViewName;
CREATE VIEW myViewName AS ...(your new query here)...
Hope that helps!
References:
http://dev.mysql.com/doc/refman/5.1/en/show-create-view.html