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mysql中查询字段为null或者不为null_MySQL
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- 2016-06-01 13:48:071637browse
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mysql中查询字段为null或者不为null 在mysql中，查询某字段为空时，切记不可用 = null，而是 is null，不为空则是 is not null select * from table where column is null; select * from table where column is not null;
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