I want to save new data from access tables to sql tables without overwriting old data in sql. Data table format for access and sql is same.(using Visual Basic)
If there is a unique id on the row, then you can check whether the value is already in the database (logically equivalent to this):
insert into data_table dt
select * from access_table a
where a.id not in (select id from data_table)
A unique id, of course, is any subset of fields in the row, identifying a unique row.
Related
I have this newly created table in SQL Server with 3 columns ID, Name, Source.
Basically this table will be populated with data from other different tables, each specifically taking in their record IDs and record Names. I believe this can be easily achieved with an INSERT INTO SELECT statement.
I would like to find out on how to populate the Source column. This column is supposed to indicate which table the data came from. For example, Source in table A has 3 records, which I then copied the ID and Name columns from this table, and put it into my destination table.
At the same time, the 3 new records will have their Source column set, indicating it came from Table A. Then I will proceed to do the same for other tables.
You can use the constant string as follows:
INSERT INTO your_table
SELECT id, name, 'TableA' as source
FROM tableA
I have 2 tables in my SQL database:
And I want to merge them in a way the result will be:
This is just an example for 2 tables which need to be merged into one new table (The tables contain an example data, the statement should work for any amount of data inside the tables).
The ID which got different value in CSV should be updated into the new table for example:
ID 3's value is 'KKK' and in table T is 'CCC', then what should be updated is the CSV table.
You seem to want a left join and to match to the second table if available:
select t.id, coalesce(csv.value, t.value) as value
from t left join
csv
on t.id = csv.id;
If you want this in a new table, use the appropriate construct for your database, or use insert to insert into an existing table.
I want only the unique records in same or new table. And I want to do this with different tables (having duplicate records) in access database through same code.
The flow should be like:
input table ------VBA MODULE------> table with unique records
I am able to do this group by function but for that i have to use field names in query. But field names will differ from table to table.
Please help!
Just use query
SELECT DISTINCT * FROM MyAnyTable
How can I get the record number in a form?
Can I use it in sql queries?
Edit: I have a report that gets its data from form by a sql query, the problem is when I have multiple records the report shows the first record of table
You should never rely on something that is not part of the data itself. For each of your tables, you can have an ID column as an autoinc integer value (primary key).
use an unbounded text box (from your table or query) with the source being
=[CurrentRecord]
Add a field as such
SELECT A.*,
(SELECT COUNT(*) FROM AssetsExtended where A.ID>=ID) AS RowNum
FROM AssetsExtended AS A
ORDER BY A.ID;
I have a SQL Server table that has a unique field which matches a unique field in an Access DB table.
I need to get the Access DB table into the SQL Server table based on that field.
How do I go about doing this?
I want to say a JOIN, but a JOIN is just a temporary query, isn't it? I want this to be permanent. I want the Access DB table data merged into SQL Server table based on this unique field.
What's the best way to do this?
Thanks.
The reason I need this separate is that a software is reading this SQL Server data, so I need it all in the same table.
B,
I believe what you would be looking for is Union
With the two tables being
HumanResources.Employees and HumanResources.Employees2
SELECT ID, Name FROM HumanResources.Employees
UNION
SELECT ID, Name FROM HumanResources.Employees2