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wxjcn 2003-04-29
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where col is null
where col is not null
where col is not null
qfsb_p 2003-04-29
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应该用 is null或者是is not null
jiezhi 2003-04-29
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col is null
col is not null
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| 相逢何必曾相识 |
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col is not null
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| 相逢何必曾相识 |
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dzhrg 2003-04-29
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谢谢~~~
volin 2003-04-29
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using is null or is not null
