SQL Update statement

Translated submission in the German forum. You can read the original entry here .

Hello,

I want to update a field of an SQL database, in this case overwriting a value of 9 to 0 (the record is to be cleared).

Should I place the SQL Adapter on both READ and WRITE sides with the relevant database table?
Is the field then updated using a Replace Heater?

I have experimented with it this way and obtain the following SQL statement:

update [VEIS_INVOICE] set [ENTITYSTATE] = 0 where [PK_VEIS_INVOICE] = null

But it doesn’t work.
What am I doing wrong?

Best wishes
Martin

Hallo Martin,

Your approach of using the same table twice (once for READ, once for WRITE) is correct.

In order that an SQL Update statement is (correctly) generated, the Primary Key fields of the READ/WRITE sides must be connected together.

All of the Heaters connected are always executed and this also applies to an UPDATE.

Please make certain that in the Configurator for the SQL Server Adapter on the WRITE side that the option UPDATE is checked! Then everything should work.

WARNING: If on the READ side you do not define a WHERE clause restriction, then all records in the table are updated.