when i join two tables, i find a table has the problem of data skew, and the skewing value of the field is null. so i want to filte the null before InnerJoin. like that
a.key is skewed and the skewing value is null Change "select * from a join b on a.key = b.key" to "select * from a join b on a.key = b.key and a.key is not null" The idea is feasible ?
