I want to Write NULL to MSSQL By Using Rdbms Interface，
this my sql query
Insert into Table_1(Time,Val1,Val2,Val3) Values (?,?,?,?);
P1=Ts P2=NULL P3=NULL P4=NULL
That should work. The tag can be scan-driven (on a scan class, on a periodic basis) or event-driven (writes when a source tag changes).
The PI-RDBMS interface manual has this particular use case as an example.
Event-driven can use any tag? like sinusoid?
Can you explain your use case here? Why do you want to write NULL values from PI to MS SQL server?
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