I am trying to join multiple tables using the gui. However, I am not seeing any options available. It's primarily allowing joining of two tables. In case we would like to join multiple tables, there's a SQL Task "SQL Component" available where we can write the SQL script to have multiple table Joins. Is there any other GUI options.
This is easily doable and supported using the gui. You can join as many tables as needed using the join component. Just add each table in the join properties of the join component, and add the conditions for each join in the join expressions property of the join component.
In Matillion, there's no option available apart from the "SQL Component" . Please check all the videos of Matillion. I had a discussion with their customer care and they have confirmed. Multiple tables can be joined by writing SQL script in the "SQL Component"
Related
I have two databases, one is oracle and the other one is postgres, and I need to perform a join select between tables in those databases. Is there any way to make this possible?
That is simple.
Install oracle_fdw in the PostgreSQL database and define a foreign table for the Oracle table.
Then you can perform the join as if it were two PostgreSQL tables.
Be careful with big or complicated queries though: of course, the performance will be worse than for a join of two local tables.
I have two foxpro files as detailed below
E:\F1\Table1.dbf {Id, Name, Address, City}
E:\F2\Table2.dbf {Id, qualifcn, marks}
How can I join them to get an ADODB record set with details from both tables?
Thanks and regards
Jojy
Like I have asked other people with similar questions - is this a One-time need or is this an On-going need?
For your general SQL syntax you might want to look at:
Inner and Outer SQL Joins
Especially - 4) Full Outer Join SQL Example
But if this is a one-time need, you can merely:
Manually create a new recipient table with ALL fields
Append Table1 into new table
Set relation to ID into Table2
REPLACE the recipient table's 'extra' fields with the Related Table2 values
After which your new recipient table has ALL field values from both tables.
Good Luck
I KNOW the following has worked with OleDB connection and same principal may work for you. Since both your data components are on the same logical drive, just different paths, you might be able to via common root.
Instead of making a connection to your direct folder where the first data location is, make a connection to the common root path. Then in your query, refer to the RELATIVE PATH to the tables
Connect to E:\
Your query could be
select
T1.*,
T2.*
from
F1\Table1 T1
JOIN F2\Table2 T2
on T1.ID = T2.ID
where
...
I just imported data into an oracle database from a dump file. But I want to know constraints to enable me to make an Entity Relationship diagram and its links.
I used
select * from cat;
to get the description of each table. But this is not showing constraints and looks cumbersome to explore all tables like this.
You should query USER_CONSTRAINTS and USER_CONS_COLUMNS to find such a data.
Also, if you use DBMS_METADATA.GET_DDL (see documentation), you'll be able to extract DDL used to create tables & constraints.
However, consider using a GUI tool which enables you to "draw" tables and automatically queries metadata in order to graphically display information you're interested in. One of these is TOAD which, in its "Database - Report" menu offers the "ER diagram". I believe some other tools have it as well.
I am developing a java app which can connect to oracle database and selecting column names from any tables, after selecting columns i have to query the data from those tables which the user select in my java app, now my question is how can i join all tables in the database so that query returns data successfully, i want to connect to any oracle schema to a specific, i will make the logic in java, but i am unable to find the query which can extract the data from all tables, i tried natural join among all tables but it has dependency of having same name of connecting columns. so i want to know any generic way which can work in all conditions.
As others have mentioned.. it seems that there are other tools out there that you probably should leverage prior to trying to roll your own complex solution.
With that said if you wish to roll your own solution you could look into using some of oracle's dictionary tables. Such as:
Select * from all_tables;
Select * from all_tab_cols;
I have two database connections in sql developer active lets say DB1 and DB2. I am working on ETL validation. So I want to check if data from Table1 of DB1 is populated correctly in Table2 of DB2.
To access tables from this two connections how can I write a query?
Any help on this will be helpful
There are common ways to validate if the ETL is correct:
You can run 2 queries to calculate the line counts separately against to Table1#DB1 and Table2#DB2, and compare the line counts between them.
Or perform some aggregate functions, such as sum(), avg()...etc on tables in DB1/DB2.