I have big flat table with 100 columns in it. For about 40% of its data, 90 columns would be null out of 100.And this table keeps growing and will initial have more than 100 million rows.
May I know, will this impact the size in anyways as I heard nulls will take no or very little space in PostgreSQL unlike oracle. even for millions of rows with many columns in it. Is that true?
And if that is not true, would you recommend to make this table into 2 tables with the 2nd table containing those 40% records with only 10 required columns in it?