I want to reset autoincrement _key value in arangodb. How?
I do not know of a way to reset the auto increment in place. But how about:
creating a new collection
inserting all the data from the existing table , if any (without specifying the _key in the insert so the data gets a new _key).
Deleting the old collection (after verifying the data was properly inserting in the new table).
And finally, renaming the new table to the old table's name.
Related
I am trying to create a collection name based on the date like i have a collection name like this Change 06-05-2020 and i want to overwrite this collection daily and make the collection name like this Change 07-05-2020 and so on is it possible to do it i ma creating the collection in this way.and basically i am trying to store the daily updated data in a particular way so i can track that information.so can i update the collection name dynamically daily?
await growthfilemsdb.collection(`Change${getISO8601Date()}`).doc(change.after.data().officeId).set(change.after.data(),{merge:false})
It's not possible to change the name of a collection. What you can do instead is simply copy all the documents from the old collection to a new one with a new name.
However, it's usually not a good idea to make the names of your collection dynamic like this. Instead, consider putting the date as a field inside the document, and using that to filter the results of queries or delete old documents.
I'm building a mongoDB database that holds sales data from multiple different systems. Each system is integrated via an node/mongoose/Express API that I'm creating for the database. Typically, you'd check the id to determine if a record already exists, and insert it if it doesn't. But since the ID from these different sources could technically overlap, I need a system to make sure that a source can only update records that originally came from that source. So I've added a column called "external_ID" where the record id from the source is saved, and another column called "integration ID", which will be unique to the specific system that sends data. But for that idea to work, I'd need to update only if those two columns matches, and otherwise insert a new record. Is that possible with MongoDB, or am I approaching this wrong?
Thank you so much.
Use upsert on update(). It will creates a new document when no document matches the query criteria.
db.collection.update(<query>, <update>, { upsert: true })
You can find more detail at Upsert Behavior documentation
I added a new field. This field is present in pretty much all the data rows that Azure search will be returned and needs to be indexed.
Changed the VIEW that returns rows to AzureSearch to return a new row ("name")
Added a new field to the Index ("name")
Verified via Search Explorer that "name" field is returned in results for that index. It is currently always null (as expected) in the results.
Now how do I trigger a full reindex so the "name" field will contain values for ALL the rows, and not just for the NEW rows going forward.
(of course, I could delete the index and recreate a new one and repoint my code to the new index, but it seems needlessly brute force!)
Right, reset the indexer's change tracking state using Reset Indexer API. You can also reset the indexer in Azure Portal or using .NET client SDK.
I have an inverted index table on a table of Users. The table allows querying users by last name. It is called "users_by_lastname".
Primary key of this table has "lastname" in it, so it cannot be updated.
If a user changes their last name in the main "Users" table, should I be deleting and re-inserting into the inverted index table, "users_by_last name"?
I cannot update a primary key column in Cassandra... Are there other patterns that handle this better?
In Cassandra 3.0 you can deal with this problem by creating the inverted index table as a materialized view of the Users table. Then Cassandra will take care of maintaining the view automatically whenever you update the base table.
On earlier versions of Cassandra your only option would be to do a delete and then insert with the new last name in the application maintained inverted index table.
I have one table called: Transaction. This table has the following fields: (ID,ProductName,Amount,Date) placed in an excel sheet that is connected with MS Access database. ID is the only unique field. Sometimes, my user submits a transaction that has let's say 5 records. Then, they want to modify the submitted data in case if they entered incorrect amount and they want to correct it. I want to write a code in VBA that will do the update. my current query is:
Update table Transaction(ProductName,Amount) set ProductName=#Product,Amount=#Amount)
where Date=#date;
This query does not work fine because obviously it replaces all the records data with the data of the last resubmitted record because my condition is weak. My difficulty is that I can't find a good condition in the where clause that will do the update a record by record accordingly.
Please help,
You will need to use the unique id of the record, in your case the ID field to guarantee you are updating the correct record.
Something like the following:
Update table Transaction(ProductName,Amount) set ProductName=#Product,Amount=#Amount) where ID = "id of record you want to update"
Enjoy!