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SQLColumns
SQLColumns[conn]
returns the SQLColumn objects for each column in an SQL connection.
范例打开所有单元
基本范例 (1)
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If you find that the examples in this section do not work as shown, you may need to install or restore the example database with the 
package, as described in Using the Example Databases.
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Get all columns from tables whose names start with "SA":
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Get all columns from a particular table:
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Get columns whose names begin with "V" from all tables:
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