工作犬证和狗证是两种不同的证件，很多人认为它们可以相互代替，那么工作犬证能代替狗证吗？
I have a table with expand/collapse functionality. How do I enforce fixed width for columns in such a table?
I have problem while converting varchar type to Int type in Informix. Actually I don\'t know if the value is really varchar or not which I want to convert to INT. It\'s a sandbox system.
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