很多用户会关心FileGDB的参数，扒出来方便参考：
File geodatabase size and name limits are as follows:
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File geodatabase size: No limit
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Table or feature class size： 1 TB (default), 4 GB or 256 TB with keyword
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Number of feature classes and tables: 2,147,483,647
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Number of fields in a feature class or table: 65,534
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Number of rows in a feature class or table: 2,147,483,647
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Geodatabase name length: Number of characters the operating system allows in a folder name
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Feature class or table name length: 160 characters
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Field name length: 64 characters
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Text field width: 2,147,483,647
链接：
http://resources.arcgis.com/en/help/main/10.1/index.html#//018s00000002000000
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