sql语法手册.htm

讲解了sql的基本用法

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      <H1>&nbsp;</H1>
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      <H1><SPAN lang=EN-US>Select</SPAN></H1>
      <P class=MsoNormal><B><SPAN 
      style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">用途：</SPAN><SPAN 
      lang=EN-US><O:P></O:P></SPAN></B></P>
      <P class=MsoNormal><SPAN lang=EN-US><SPAN 
      style="mso-spacerun: yes">&nbsp;</SPAN></SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">从指定表中取出指定的列的数据</SPAN></P>
      <P class=MsoNormal><B><SPAN 
      style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">语法：</SPAN><SPAN 
      lang=EN-US><O:P></O:P></SPAN></B></P>
      <P class=MsoNormal><SPAN lang=EN-US>&nbsp;<O:P></O:P></SPAN></P>
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          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt"><PRE><SPAN lang=EN-US style="FONT-SIZE: 9.5pt; COLOR: black">SELECT column_name(s) FROM table_name<O:P></O:P></SPAN></PRE></TD></TR></TBODY></TABLE>
      <P class=MsoNormal><SPAN lang=EN-US>&nbsp;<O:P></O:P></SPAN></P>
      <P class=MsoNormal><B><SPAN 
      style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">解释：</SPAN><SPAN 
      lang=EN-US><O:P></O:P></SPAN></B></P>
      <P class=MsoNormal style="TEXT-INDENT: 21pt"><SPAN 
      style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">从数据库中选取资料列，并允许从一或多个资料表中，选取一或多个资料列或资料行。</SPAN><SPAN 
      lang=EN-US>SELECT </SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">陈述式的完整语法相当复杂，但主要子句可摘要为：</SPAN></P>
      <P class=MsoNormal><SPAN lang=EN-US>SELECT select_list <BR>[ INTO 
      new_table ] <BR>FROM table_source <BR>[ WHERE search_condition ] <BR>[ 
      GROUP BY group_by_expression ] <BR>[ HAVING search_condition ] <BR>[ ORDER 
      BY order_expression [ ASC | DESC ] ] </SPAN></P>
      <P style="MARGIN: 0cm 0cm 0pt"><B><SPAN 
      style="FONT-FAMILY: 宋体; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">例：</SPAN><SPAN 
      lang=EN-US><O:P></O:P></SPAN></B></P>
      <P style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US 
      style="FONT-SIZE: 8.5pt; COLOR: black"><SPAN 
      style="mso-spacerun: yes">&nbsp;</SPAN>“Persons” </SPAN><SPAN 
      style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">表中的数据有</SPAN><SPAN 
      lang=EN-US style="FONT-SIZE: 8.5pt; COLOR: black"><O:P></O:P></SPAN></P>
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            <P class=MsoNormal><B><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">LastName<O:P></O:P></SPAN></B></P></TD>
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          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><B><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">FirstName<O:P></O:P></SPAN></B></P></TD>
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            <P class=MsoNormal><B><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Address<O:P></O:P></SPAN></B></P></TD>
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          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><B><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">City<O:P></O:P></SPAN></B></P></TD></TR>
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            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Hansen<O:P></O:P></SPAN></P></TD>
          <TD 
          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Ola<O:P></O:P></SPAN></P></TD>
          <TD 
          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Timoteivn 
            10<O:P></O:P></SPAN></P></TD>
          <TD 
          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Sandnes<O:P></O:P></SPAN></P></TD></TR>
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          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Svendson<O:P></O:P></SPAN></P></TD>
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          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Tove<O:P></O:P></SPAN></P></TD>
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          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Borgvn 
            23<O:P></O:P></SPAN></P></TD>
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          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Sandnes<O:P></O:P></SPAN></P></TD></TR>
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          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Pettersen<O:P></O:P></SPAN></P></TD>
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          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Kari<O:P></O:P></SPAN></P></TD>
          <TD 
          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Storgt 
            20<O:P></O:P></SPAN></P></TD>
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          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Stavanger<O:P></O:P></SPAN></P></TD></TR></TBODY></TABLE>
      <P class=MsoNormal><SPAN 
      style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">选出字段名</SPAN><SPAN 
      lang=EN-US>”</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9.5pt"> 
      LastName</SPAN><SPAN lang=EN-US>”</SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">、</SPAN><SPAN 
      lang=EN-US>”</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9.5pt"> 
      FirstName</SPAN><SPAN lang=EN-US>” </SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">的数据</SPAN></P>
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          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt"><PRE><SPAN lang=EN-US style="FONT-SIZE: 9.5pt; COLOR: black">SELECT LastName,FirstName FROM Persons<O:P></O:P></SPAN></PRE></TD></TR></TBODY></TABLE>
      <P style="MARGIN: 0cm 0cm 0pt"><SPAN 
      style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">返回结果</SPAN><SPAN 
      lang=EN-US style="FONT-SIZE: 8.5pt; COLOR: black">:<O:P></O:P></SPAN></P>
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          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><B><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">LastName<O:P></O:P></SPAN></B></P></TD>
          <TD 
          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><B><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">FirstName<O:P></O:P></SPAN></B></P></TD></TR>
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          <TD 
          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Hansen<O:P></O:P></SPAN></P></TD>
          <TD 
          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Ola<O:P></O:P></SPAN></P></TD></TR>
        <TR>
          <TD 
          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Svendson<O:P></O:P></SPAN></P></TD>
          <TD 
          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Tove<O:P></O:P></SPAN></P></TD></TR>
        <TR>
          <TD 
          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Pettersen<O:P></O:P></SPAN></P></TD>
          <TD 
          style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; PADDING-TOP: 0.75pt">
            <P class=MsoNormal><SPAN lang=EN-US 
            style="FONT-SIZE: 8.5pt; COLOR: black; FONT-FAMILY: Verdana">Kari<O:P></O:P></SPAN></P></TD></TR></TBODY></TABLE>
      <P class=MsoNormal><SPAN 
      style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">选出所有字段的数据</SPAN></P>
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