📄 droptablestatement.htm

📁 Absolute Database 5.12 src. Absolute Database lets you forget the Borland Database Engine (BDE). Th
💻 HTM
字号:
<html>
<head>
   <title>DROP TABLE Command</title>
</head>

<!--#include virtual="/inc/header.php"-->


<table width="100%" border="0" cellspacing="0" cellpadding="2" bgcolor="#FFFFFF">
  <tr>
    <td align="left">
      
<span style="font-family:Helvetica,Arial; font-size:12pt; color:#000000"><b>DROP TABLE Command
<br>
</b></span>
    </td>
    <td align="right">
     <font face="Arial" size="2">
     <a href="altertablestatement.htm">Previous</a>&nbsp;
     <a href="overview.htm">Top</a>&nbsp;
     <a href="truncatetablecommand.htm">Next</a>
     </font>
    </td>
  </tr>
</table>
<br><br>



<span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">
<br>
DROP TABLE allows you to remove an existing table. 
<br>

<br>
<b>Syntax
<br>
</b><span style="font-family:Helvetica,Arial; font-size:4pt; color:#000000"><b>
<br>
</b></span><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">DROP TABLE [ IF EXISTS ] [ MEMORY ] <i>table_name</i></span><span style="font-family:Times New Roman; font-size:12pt; color:#000000">
<br>
</span><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">
<br>
<b>Description
<br>
</b></span><span style="font-family:Helvetica,Arial; font-size:4pt; color:#000000">
<br>
</span><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">DROP TABLE removes a table. All table data and the table definition are removed, so be careful with this command! 
<br>
DROP TABLE will not return an error or raise exception if the table doesn't exist.
<br>
</span><span style="font-family:Times New Roman; font-size:12pt; color:#000000"> </span><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">
<br>
IF EXISTS
<br>
<table width="100%" border="0" cellpadding="0" cellspacing="0"><tr valign="top"><td width="14"></td><td><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">Regardless of this keyword specification, the table will not be dropped, if the table doesn't exist and an exception will not be raised.
&nbsp;<br>
</span></span></td></tr></table><table width="100%" border="0" cellpadding="0" cellspacing="0"><tr valign="top"><td width="14"></td><td><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000"></span></td></tr></table><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">
<br>
MEMORY
<br>
<table width="100%" border="0" cellpadding="0" cellspacing="0"><tr valign="top"><td width="14"></td><td><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">If MEMORY keyword is specified before the <i>table_name</i> then an in-memory table will be removed, not a disk one.
&nbsp;<br>
</span></span></td></tr></table><table width="100%" border="0" cellpadding="0" cellspacing="0"><tr valign="top"><td width="14"></td><td><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000"></span></td></tr></table><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000"></span><span style="font-family:Helvetica,Arial; font-size:4pt; color:#000000">
<br>
</span><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000"><i>table_name</i>
<br>
<table width="100%" border="0" cellpadding="0" cellspacing="0"><tr valign="top"><td width="14"></td><td><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">The name of the table to be removed.
&nbsp;<br>
</span></span></td></tr></table><table width="100%" border="0" cellpadding="0" cellspacing="0"><tr valign="top"><td width="14"></td><td><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000"></span></td></tr></table><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000"></span><span style="font-family:Times New Roman; font-size:12pt; color:#000000">
<br>
</span><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000"><b>Example:
<br>
</b></span><span style="font-family:Helvetica,Arial; font-size:4pt; color:#000000"><b>
<br>
</b><table width="100%" border="0" cellpadding="0" cellspacing="0"><tr valign="top"><td width="14"></td><td><span style="font-family:Helvetica,Arial; font-size:4pt; color:#000000"></span></span><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">DROP TABLE developers
&nbsp;<br>
</span></td></tr></table><table width="100%" border="0" cellpadding="0" cellspacing="0"><tr valign="top"><td width="14"></td><td><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000"></span></td></tr></table><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">
<br>

<br>
</span></span>

<!--#include virtual="/inc/footer.php"--> 
</html>
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -