Checking for Blank Date field in Salesforce

How do I check if 开发者_如何转开发a field is Blank in Salesforce using SOQL.

Thanks

SOQL has support for NULL values, so you should be able to query as you do with regular SQL. For example:

SELECT column
FROM table
WHERE date_field = NULL

Notice the use of = NULL instead of IS NULL as you would find in SQL.