I have two tables. adjustments and transactions. I want to delete all loan adjustments contained in transactions.
There are three corresponding fields to it. Date. ID. Value.
There are no fks. I used a delete join but it didn't work.
However when using a join it asks for me to specify data for trans.id. Trans.date. Trans.value. Is there anyway to forgo the where as I want to delete all of the related entries from adjustments in transactions.
If you want to delete all the row from Transactions table referencing in Adjustments table. There should be a column in Transactions table which references to some column in Adjustments table.
Suppose the ID column in your Transactions table References some ID column in Adjustments table then you would write this delete query something like this...
DELETE FROM Transactions
WHERE EXISTS ( SELECT 1
FROM Adjustments
WHERE ID = Transactions.ID)
Related
I have a main table that contain the customers details, I built another table that contain for example a yes/no fields about if the customer paid his taxes, the two tables is linked with autonumber from the main table.
I want always to keep them both with the same amount of records (that means every customer has a record in the second table even if the second table has empty record with data only in the primary key field)
I need that cause with missing records I cannot run update query to auto fill the second table and i got an error of validation rule violation.
I use this sql:
update clients LEFT JOIN MonthlyTbl ON clients.SerialNo = MonthlyTbl.serialno
set sReport04='ready';
I have almost 700 records in the main table and only 80 records in the second, and when I run the sql it updates only 80!!!!
Thanks for Help
Please use below query,
update clients set sReport04='ready' where SerialNo in
(select serialno from MonthlyTbl);
here is the right answer
first run the sql:
INSERT INTO monthlytbl ( serialno )
SELECT clients.serialno FROM clients
WHERE (((clients.[serialno]) Not In (select serialno from monthlytbl)));
and then:
select sreport04 from monthlytbl
set sReport04='ready';
I work in PostgreSQL
I have two tables. The first is the product and the second is the receipt. They are referenced using a foreign key (the product in the receipt table). I need to delete the product row from the product table, but to keep the reference. I wanted to make it a "virtual table" (product) where the receipt table will reference after deleting information from the main product table.
But I can't figure out how to do it... Can someone tell me or show me how to do this.
You can't have a foreign key relationship to a non-existent row. So, do a soft-delete. That is, add a column to the products table such as is_deleted.
Then don't actually delete the row. Just set the column to true.
It can be helpful to have a view for active products:
create view v_products as
select p.*
from products p
where not is_deleted;
EDIT:
If you want to change the row in the original table, you can use a cascading option on the trigger. Use on delete cascade to remove the row in receipts or on delete set null to set the referencing value to NULL. I'm not a fan of these because you lose the original data.
I have 3 tables.
InvoiceOriginal
Invoice
InvoiceHistory
the invoice table has a foreign key constraint.
Each entry in the invoice table has a corresponding entry in Invoiceoriginal.
The invoiceOriginal table stores the original values of the invoice and invoice table stores the values which have been modified by the user.
this is done to get diferrences at the time of submission.
the SQL I am using is
DELETE i
FROM invoice i
INNER JOIN InvoiceHistory aih
ON i.ClientId = aih.HistoryClientNumber
AND i.invoiceNumber = HistoryInvoiceNumber
however deletion is not possible because of foreign Key constraint.
The table is as under:
Invoice InvoiceOriginal InvoiceHistory
Id FK_InvoiceId ClientId
ClientId ClientId InvoiceNumber
InvoiceNumber
I need to delete the entry in invoice and InvoiceOriginal once there is an entry for that invoice number in InvoiceHistory for the same clientId.
You cannot issue a delete statement against more than one table at a time, you need to have individual delete statements for each of the related tables before deleting the parent record(s)
I'm fairly sure you can't delete from multiple tables with a single statement. I would normally delete the child rows first with one statement and then delete the parent record. You may wish to do this inside a transaction if you might need to roll back on failure.
Alternatively, you could enable CASCADE ON DELETE on the foreign key which would automatically cascade the deletions through the child records if that is something that is suitable for this system.
You can't delete the records from multiple table from a single query. But you have two methods to solve this
Delete all the related records from child or mapping table, and then
delete the Parent / header table record. (Multiple queries required here. Use SQL Transaction for a better control).
Or, Modify your foreign key constraint to ON DELETE CASCADE
Yes, YOU CAN, I did it right now:
DELETE T1,T2 FROM T1
INNER JOIN
T2 ON T2.FIELD = T1.FIELD
WHERE
T1.SOMETHING='SOMETHING'
I have two tables namely futureOrder_Table and orders. I want to update the date field in futureOrder_Table table when there is a update or delete in order table delivery column. Basically if the order table date changes i also wanna change it in futureTable
I have two tables in my database, one is Transactions and the other is TransactionHistories. The latter is essentially an auditing table, whereby a trigger executes on insert, update and delete on Transactions to capture a screenshot of the data.
I am successfully retrieving all of the data stored in the Transactions table where the columns match, but the difficulty comes where I am trying to retrieve data from another table using a foreign key. For instance:
The transaction table has a field "TransactionType_TransactionTypeId", but in the audit table we wish to store its 'name' equivalent as "TransactionTypeName". This needs to be populated from the "TransactionTypes" table, which has the fields "TransactionTypeId" and "Name".
I am struggling to write a query to retrieve this as we wish. I am trying something similar to the following but having little success:
SELECT #TransactionTypeName=Name
FROM TransactionTypes
WHERE inserted.TransactionType_TransactionTypeId=TransactionTypes.TransactionTypeId;
I'm assuming that is a syntactic nightmare. If someone could point me in the right direction I would be extremely grateful!
well to get a name you should do the following
select #TransactionTypeName = TT.Name
from inserted as i
left outer join TransactionTypes as TT on TT.TransactionTypeId = i.TransactionType_TransactionTypeId
but you have to know that inserted table can have more than one row, and you are getting value for only one row.