sql - Find columns with NULL values in Teradata -


i find columns in table has null value in it. there system table have information?

to find columns "null" values allowed try... 

select * dbc.columns  databasename = 'your_db_name' , tablename = 'your_table_name' , nullable = 'y'

then identify specific rows w/ null values, take "columnname" previous result set , run queries identify results... perhaps throw them in volatile table if want take further action on them (update,delete). 

-- example found out column "foo" nullable...  create volatile table isnull_foo_col (   sel *    your_table_name    foo null ) data  on commit preserve rows;

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