通用DBI方法
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<P align=justify><SPAN class=text1>connect </SPAN></P></TD>
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<P align=justify><SPAN class=text1>建立与一个数据库服务器的连接</SPAN></P></TD></TR>
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<P align=justify><SPAN class=text1>prepare </SPAN></P></TD>
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<P align=justify><SPAN class=text1>获取准备执行的SQL语句</SPAN></P></TD></TR>
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<P align=justify><SPAN class=text1>do </SPAN></P></TD>
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<P align=justify><SPAN class=text1>准备并执行一个SQL语句</SPAN></P></TD></TR>
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<P align=justify><SPAN class=text1>disconnect </SPAN></P></TD>
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<P align=justify><SPAN class=text1>断开与一个数据库服务器的连接</SPAN></P></TD></TR>
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<P align=justify><SPAN class=text1>quote </SPAN></P></TD>
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<P align=justify><SPAN class=text1>被插入引用字符串(块)</SPAN></P></TD></TR>
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