In MySQL, 0 or NULL means false and anything else means true. : NULL : Data Types MySQL TUTORIALS

In MySQL, 0 or NULL means false and anything else means true.

Related Scripts with Example Source Code in same category :
• NULL means 'a missing unknown value'
• Use the IS NULL and IS NOT NULL operators for NULL value
• Two NULL values are regarded as equal in a GROUP BY
• NULL values are presented first if you do ORDER BY ... ASC
• NULL values are presented last if you do ORDER BY ... DESC
• Use 0 and '' is not NULL

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