mirror of https://github.com/sqlite/sqlite
206 lines
6.9 KiB
Tcl
206 lines
6.9 KiB
Tcl
#
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# Run this TCL script to generate HTML for the index.html file.
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#
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set rcsid {$Id: index.tcl,v 1.18 2000/06/09 14:14:34 drh Exp $}
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puts {<html>
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<head><title>SQLite: An SQL Database Engine Built Atop GDBM</title></head>
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<body bgcolor=white>
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<h1 align=center>SQLite: An SQL Database Engine Built Atop
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<a href="http://www.gnu.org/software/gdbm/gdbm.html">GDBM</a></h1>
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<p align=center>}
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puts "This page was last modified on [lrange $rcsid 3 4] GMT<br>"
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puts "The SQLite source code was last modifed on [exec cat last_change] GMT"
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puts {</p>}
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if 0 {
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puts {
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<h2>News</h2>
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<p>
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The SQLite code base is being called "beta" only because it is
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relatively new. It appears to be stable and usable.
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Most of the SQL language is now implemented and working.
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The regression test suite
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provides good coverage, according to
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<a href="http://gcc.gnu.org/onlinedocs/gcov_1.html">gcov</a>.
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There are currently no known errors in the code.</p>
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<p>If you find bugs or missing features, please submit a comment
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to the <a href="#mailinglist">SQLite mailing list</a>.</p>
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}
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}
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puts {<h2>Introduction</h2>
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<p>SQLite is an SQL database engine built on top of the
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<a href="http://www.gnu.org/software/gdbm/gdbm.html">GDBM library</a>.
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SQLite includes a standalone command-line
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access program (<a href="sqlite.html">sqlite</a>)
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and a C library (<a href="c_interface.html">libsqlite.a</a>)
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that can be linked
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with a C/C++ program to provide SQL database access without
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an separate RDBMS.</p>
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<h2>Features</h2>
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<p><ul>
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<li>Implements most of SQL92.</li>
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<li>A database is just a directory of GDBM files.</li>
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<li>Unlimited length records.</li>
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<li>Import and export data from
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<a href="http://www.postgresql.org/">PostgreSQL</a>.</li>
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<li>Very simple
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<a href="c_interface.html">C/C++ interface</a> uses only
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four functions and one opaque structure.</li>
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<li>A <a href="http://dev.scriptics.com/">Tcl</a> interface is
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included.</li>
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<li>Command-line access program <a href="sqlite.html">sqlite</a> uses
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the <a href="http://www.google.com/search?q=gnu+readline+library">GNU
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Readline library</a></li>
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<li>A Tcl-based test suite provides near 100% code coverage</li>
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<li>7500+ lines of C code. No external dependencies other than GDBM.</li>
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<li>Built and tested under Linux (RedHat 6.0). Should work under any Unix and
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probably also under Windows95/98/NT/2000.</li>
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</ul>
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</p>
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<h2>Current Status</h2>
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<p>A <a href="changes.html">change history</a> is available online.
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There are currently no <em>known</em> bugs or memory leaks
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in the library. <a href="http://gcc.gnu.org/onlinedocs/gcov_1.html">Gcov</a>
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is used to verify test coverage. The test suite currently exercises
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all code except for a few areas which are unreachable or which are
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only reached when <tt>malloc()</tt> fails. The code has been tested
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for memory leaks and is found to be clean.</p>
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<p>
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Among the SQL features that SQLite does not currently implement are:</p>
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<p>
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<ul>
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<li>outer joins</li>
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<li>constraints are parsed but are not enforced</li>
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<li>no support for transactions or rollback</li>
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</ul>
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</p>
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<h2>Documentation</h2>
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<p>The following documentation is currently available:</p>
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<p><ul>
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<li>Information on the <a href="sqlite.html">sqlite</a>
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command-line utility.</li>
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<li>The <a href="lang.html">SQL Language</a> subset understood by SQLite.</li>
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<li>The <a href="c_interface.html">C/C++ Interface</a>.</li>
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<li>The <a href="fileformat.html">file format</a> used by SQLite databases.</li>
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<li>The <a href="arch.html">Architecture of the SQLite Library</a> describes
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how the library is put together.</li>
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<li>A description of the <a href="opcode.html">virtual machine</a> that
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SQLite uses to access the database.</li>
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</ul>
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</p>
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<p>The SQLite source code is 35% comment. These comments are
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another important source of information. </p>
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}
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puts {
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<a name="mailinglist" />
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<h2>Mailing List</h2>
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<p>A mailing list has been set up on eGroups for discussion of
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SQLite design issues or for asking questions about SQLite.</p>
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<center>
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<a href="http://www.egroups.com/subscribe/sqlite">
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<img src="http://www.egroups.com/img/ui/join.gif" border=0 /><br />
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Click to subscribe to sqlite</a>
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</center>}
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puts {<h2>Download</h2>
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<p>You can download a tarball containing all source
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code for SQLite (including the TCL scripts that generate the
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HTML files for this website) at <a href="sqlite.tar.gz">sqlite.tar.gz</a>.}
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puts "This is a [file size sqlite.tar.gz] byte download. The
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tarball was last modified at [clock format [file mtime sqlite.tar.gz]]"
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puts {</p>
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<p>To build sqlite, just unwrap the tarball, create a separate
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build directory, run configure from the build directory and then
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type "make". For example:</p>
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<blockquote><pre>
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$ tar xzf sqlite.tar.gz <i> Unpacks into directory named "sqlite" </i>
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$ mkdir bld <i> Create a separate build directory </i>
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$ cd bld
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$ ../sqlite/configure
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$ make <i> Builds "sqlite" and "libsqlite.a" </i>
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$ make test <i> Optional: run regression tests </i>
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</pre></blockquote>
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}
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puts {<h2>Command-line Usage Example</h2>
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<p>Download the source archive and compile the <b>sqlite</b>
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program as described above. The type:</p>
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<blockquote><pre>
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bash$ sqlite ~/newdb <i>Directory ~/newdb created automatically</i>
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sqlite> create table t1(
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...> a int,
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...> b varchar(20)
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...> c text
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...> ); <i>End each SQL statement with a ';'</i>
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sqlite> insert into t1
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...> values(1,'hi','y''all');
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sqlite> select * from t1;
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1|hello|world
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sqlite> .mode columns <i>Special commands begin with '.'</i>
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sqlite> .header on <i>Type ".help" for a list of commands</i>
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sqlite> select * from t1;
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a b c
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------ ------- -------
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1 hi y'all
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sqlite> .exit
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base$
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</pre></blockquote>
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}
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puts {<h2>Related Sites</h2>
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<ul>
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<li><p>The canonical site for GDBM is
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<a href="http://www.gnu.org/software/gdbm/gdbm.html">
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http://www.gnu.org/software/gdbm/gdbm.html</a></p></li>
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<li><p>Someday, we would like to port SQLite to work with
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the Berkeley DB library in addition to GDBM. For information
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about the Berkeley DB library, see
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<a href="http://www.sleepycat.com/">http://www.sleepycat.com/</a>
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</p></li>
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<li><p>Here is a good <a href="http://w3.one.net/~jhoffman/sqltut.htm">
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tutorial on SQL</a>.</p></li>
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<li><p><a href="http://www.postgresql.org/">PostgreSQL</a> is a
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full-blown SQL RDBMS that is also open source.</p></li>
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<li><p><a href="http://www.chordate.com/gadfly.html">Gadfly</a> is another
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SQL library, similar to SQLite, except that Gadfly is written
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in Python.</p></li>
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<li><p><a href="http://www.vogel-nest.de/tcl/qgdbm.html">Qgdbm</a> is
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a wrapper around
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<a href="http://www.vogel-nest.de/tcl/tclgdbm.html">tclgdbm</a>
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that provides SQL-like access to GDBM files.</p></li>
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</ul>}
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puts {
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<p><hr /></p>
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<p>
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<a href="../index.html"><img src="/goback.jpg" border=0 />
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More Open Source Software</a> from Hwaci.
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</p>
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</body></html>}
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