Question use 5 datatable from a dataset in an expression of a datatable

[pooya1072]

hi
there is 6 datatable in a dataset . i want to add 5 datatable's column' values in an expression of sixth datatable.i know how can i use one datatable ... but 5 datatable ... i dont how.
please guide me.

 

[jmcilhinney]

Five is no different to one. It's just one five times. You simply specify the relationships in the expression.