Access开发遇到的问题与总结
问题: 1.字段限制。当字符数超过65000时,报错。查询过于复杂。 解决办法: 可以通过使用PreparedStatement 的参数查询功能解决。 代码示例: String sql = insert into [table] (title,legislationnumber,assentdate,href,texts) values(?,?,?,?,?);Prepar
问题:
1.字段限制。当字符数超过65000时,报错。查询过于复杂。
解决办法:
可以通过使用PreparedStatement
的参数查询功能解决。
代码示例:
<pre class="brush:php;toolbar:false">String sql = "insert into [table] (title,legislationnumber,assentdate,href,texts) values(?,?,?,?,?)"; PreparedStatement ps = conn.prepareStatement(sql); ps.setString(1, bean.getTitle()); ps.setString(2, bean.getLegisnum()); ps.setString(3, bean.getAssent()); ps.setString(4, bean.getHref2()); ps.setString(5, bean.getTexts());//texts字段大于65000。 int i = ps.executeUpdate();
例如 #、%、*的时候加入[#]、[%]、[*]就可以查询了。
3.memo、ole对象无效。
字段类型为备注的不能加入子查询。修改为文本就可以了。但是,有些字段的长度大于255时就不要修改了。这样会有数据截断的错误。

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