I have three linked tables in my MS Access Database, and I am trying to run just one query to append them all into a master table, rather than creating a separate query for each one.
Can someone give me an example code using generic table names to show how I would union or join these table with query code?
SELECT [TableA].*
FROM TableA
UNION
SELECT [TableB].*
FROM TableB;
etc.
You can do a SELECT * INTO NEWTABLE . . .
You can do all kinds of things. Google is your best friend.
Related
i have data in a table and some new one in a s3 stage .
i want to append the stage data to the existing one .
what is the best way to do that in snowflake ?
Also it's in a script and i don't know what columns are in the tables but i know that they are identical , and none will match.
i tried to do some merge but i need to specify columns
i guess i can do a create table as (select both tables) but it makes me create a 3rd table...
Insert into , i don't have the columns name .
The result would be just the two tables together .
basically i want to apply a concat but to tables .
Thank you =)
Is this what you're looking for?
SELECT * from table_a
union
SELECT * from table_b
I have many SQL Server tables in a database that have information about the same domain (same columns) and their names are the same plus a date suffix (yyyyMMdd):
TABLE_ABOUT_THIS_THING_20200131
TABLE_ABOUT_THIS_THING_20191231
TABLE_ABOUT_THIS_THING_20191130
TABLE_ABOUT_THIS_THING_20191031
TABLE_ABOUT_THIS_THING_20190930
TABLE_ABOUT_THIS_THING_20190831
...
This seems like it would make more sense if it was all in the same table. Is there a way, using a query/SSIS or something similar, to merge this tables into one (TABLE_ABOUT_THIS_THING) with a new column (extraction_date) made out of the current table suffix?
Using SSIS: use union for the collect data from the multi table and use Derived Column for the extraction_date before the destination for more information you can take from following link:
https://www.tutorialgateway.org/union-all-transformation-in-ssis/
You can use UNION ALL:
create view v_about_this_thing as
select convert(date, '20200131') as extraction_date t.*
from TABLE_ABOUT_THIS_THING_20200131
union all
select convert(date, '20201912') as extraction_date t.*
from TABLE_ABOUT_THIS_THING_20191231
union all
. . .
This happens to be a partitioned view, which has some other benefits.
The challenge is how to keep this up-to-date. My recommendation is to fix your data processing so all the data goes into a single table. You can also set up a job that runs once a month and inserts the most recent values into an existing table.
An alternative is to reconstruct the view every month or periodically. You can do this using a DDL trigger that recreates the view when the new table appears.
Another alternative is to create a year's worth of tables all at once -- but empty -- and to create the view manually once a year. But a note on your calendar to remind you!
You can use SSIS with the new table "TABLE_ABOUT_THIS_THING" as destination and a query that look like this as source:
`Select * FROM table1
UNION
Select * FROM table2
UNION
.
.
.`
I have a requirement to fetch data from all the tables based on common table name pattern every week.Basically my requirement is to merge all the data to form a single lookup table.
Example:
Table Names:
Department_20190101
Department_20190109
Department_20190122
Department_20190129
I have to fetch data from all the tables and have to create a single lookup table. Is there a simple way to do this other than by going through iteration in PL/SQL by getting the table names with the help of ALL_TABLES
Note:The Date part is not consistent.If i can achieve this requirement once then i can easily start inserting the data from the new table to the existing lookup(n+1)
Please share your suggestions.
Regards,
Scott
If you have a very long list of tables, or you requirement is to aggergate the results from all tables e.g. starting with Department_ followed by a certain date or range of dates, then you might need dynamic SQL for this. For the exact example you did show in your question, a CTE with a union query might work:
WITH cte AS (
SELECT * FROM Department_20190101 UNION ALL
SELECT * FROM Department_20190109 UNION ALL
SELECT * FROM Department_20190122 UNION ALL
SELECT * FROM Department_20190129
)
And then use the CTE as:
SELECT *
FROM cte;
This assumes that all tables have identical structures. Also, as a side note, if this be the case, you might want to consider just having a single table with a date column to differentiate between the otherwise common data.
Check here: Execute For Each Table in PLSQL there is nice example to resolve Your problem using pl/sql (pl/sql help You dinamicly grow up sql-query) .
I have a situation where I want to combine two tables for queries in a select statement, and I haven't found a working solution yet.
The Situation:
Table A
Table B
Both A and B have identical fields but distinct populations. I have other queries that are pulling from each table separately.
I want to build a query that pulls from them as if they were one table. There are no instances of records being in both tables.
My research so far led me to think the FULL OUTER JOIN was what I wanted, but I'm not entirely sure how to do that when I'm not really joining them on any field and it failed in my tests. So I searched for append options thinking that might more accurately represent what I'm trying to do and the INSERT INTO looked promising but less so for select statements. Is there a way to do this or do I need to create a third table that's the combination of the first two to query from?
.
This is being done as an Excel VBA query to Access via DAO. I'm building up SQL statements piece by piece in my VBA code based on user-selected options and then pulling the results into Excel for use. AS such my hope is to be able to only alter the FROM statement (since I'm building up the queries piecemeal) to effect this so that any other aspects of the select statement won't be impacted. Any suggestions or help will be much appreciated!
You can UNION the tables to do this:
SELECT StuffYouWant
FROM (SELECT *
FROM TableA
UNION ALL
SELECT *
FROM TableB) c
Something like this:
SELECT * FROM a
UNION
SELECT * FROM b
Make sure the a table and the b table have the same number of columns and the corresponding columns have the same data type
I am using MS Access to connect to a linked Oracle database. I have table B that pulls only certain columns from table A (in the linked DB).
I am trying to execute a macro that runs Query1 to update table B with the data from A that is constantly changing.
The two are not necessarily related by some ID, so the UPDATE TABLE command doesn't seem logical to me. Should I be using JOIN? I just need a place to launch my query from.
Based on the discussion in the comments, it sounds like Table B is simply a "view" on Table A. I am not confident that you need an UPDATE query.
In MS Access, the syntax to create a view is thus:
CREATE VIEW my_view AS
SELECT
col1, col2
FROM
[Table A]