mysql - NULL values in where condition is not working -


i have encountered weird problem in mysql query. following query returning me 0 result whereas there many rows should returned. query is

select distinct sku, ean, url, cid    tab_comp_data   status =''

and in many rows there null values in status column returns me no rows.

i have tried other way round.

select distinct sku, ean, url, cid    tab_comp_data   status <>'inact'

this returns me no rows.

p.s. status column can null or 'inact'

i want query null values, should use is null operator.

so, query should like:

select distinct sku, ean, url, cid    tab_comp_data  status null

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