Lookup a value from Data Source B. This is functionally equivalent to LOOKUPA except that it uses Data Source B (Target) as the connection.
object LOOKUPB(string column, FROM(from), keyValue) object LOOKUPB(string columnName, LFROM from, params KVAL keyValues)
Lookup via Data Source (B) the accountid from account where name equals the Name column.
LOOKUPB("accountid", "account", WHEN("name", Name))