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SQL query removes empty data and null fields

2022-04-22 08:42:00 【Mechanical bucket running】

1： When it comes to demand , An error was found in the database null Or for Null value , The data of this field is not what I want （ In my need ）
2： stay sql You can filter by filling in the field
This is a note , It also provides us with thinking , Those who are interested can communicate together .

and ( Field   is not null or  Field  <> '') 
and ( Field  is not null or  Field  <> '')

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