How can I join the inner join statement in a query that is used for update statement?

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I need to join the two table results and update the attributes of two tables with the help of Inner join statement

What I have tried:

cmd = new OleDbCommand("UPDATE InvoiceItems set Description ='" + txtProductName + "',Quantity = '" + txtQty.Text + "',UOM = '" + txtUOM.Text + "',UnitPrice ='" + txtUnitPrice.Text + "',GrossAmount ='" + txtGrossAmount.Text + "',VAT = '" + txtVAT.Text + "',VatAmount ='" + txtVatAmount.Text + "',Total ='" + txtTotal.Text + "', INNER JOIN InvoiceItems,TAXINVOICE on InvoiceItems.InvoiceNumber=TAXINVOICE.InvoiceNumber where InvoiceItems.InvoiceNumber= " +txtInvoice.Text.Trim()+ "",conn);

Posted 16-Oct-16 19:34pm

Member 12790908

Updated 16-Oct-16 19:56pm

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Suvendu Shekhar Giri · Answer 1 · 2016-10-16T19:56:00

You can't update two tables with a single UPDATE statement, if you are trying to do something like so. But you can use JOINS to get the data for updation to one table and can be used for fiter etc.

Doing corrections to your query should look like following-

C#

cmd = new OleDbCommand("UPDATE Inv set Description ='" + txtProductName + "',Quantity = '" + txtQty.Text + "',UOM = '" + txtUOM.Text + "',UnitPrice ='" + txtUnitPrice.Text + "',GrossAmount ='" + txtGrossAmount.Text + "',VAT = '" + txtVAT.Text + "',VatAmount ='" + txtVatAmount.Text + "',Total ='" + txtTotal.Text + "' FROM InvoiceItems Inv INNER JOIN TAXINVOICE TInv on Inv.InvoiceNumber=TInv.InvoiceNumber where Inv.InvoiceNumber=" +txtInvoice.Text.Trim(),conn);

Note: As I already said, all the columns in your UPDATE statement those you want to update should be from the table mentione in UPDATE table_name only(i.e, InvoiceItems in your case).

Please let me know, if you are trying achieve something else.
:)