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:-) (CVS 37)

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FossilOrigin-Name: 2b55f9b790e2914bbd2fd27ef23bbab79fa76937
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drh
2000-06-02 13:27:59 +00:00
parent bdc2df79b6
commit bed8690fde
17 changed files with 334 additions and 122 deletions
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38
www/sqlite.tcl
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@ -1,7 +1,7 @@
#
# Run this Tcl script to generate the sqlite.html file.
#
set rcsid {$Id: sqlite.tcl,v 1.5 2000/06/01 00:03:44 drh Exp $}
set rcsid {$Id: sqlite.tcl,v 1.6 2000/06/02 13:28:00 drh Exp $}
puts {<html>
<head>
@ -30,7 +30,7 @@ should really be the name of a directory on your disk. If that
directory did not previously contain an SQLite database, a new one
is created for you automatically. The <b>sqlite</b> program will
prompt you to enter SQL. Type in SQL statements (terminated by a
semicolon, press "Enter" and the SQL will be executed. It's as
semicolon), press "Enter" and the SQL will be executed. It's as
simple as that!</p>
<p>For example, to create a new SQLite database named "ex1"
@ -56,11 +56,8 @@ sql> (((create table tbl1(one varchar(10), two smallint);)))
sql> (((insert into tbl1 values('hello!',10);)))
sql> (((insert into tbl1 values('goodbye', 20);)))
sql> (((select * from tbl1;)))
one = hello!
two = 10
one = goodbye
two = 20
hello!|10
goodbye|20
sql>
}
@ -73,7 +70,7 @@ from the computer are shown in black with a constant-width font.)</p>
End-Of-File character (usually a Control-D) or the interrupt
character (usually a Control-C).</p>
<p>Make sure you type a semicolon at the end of each SQL command.
<p>Make sure you type a semicolon at the end of each SQL command!
The sqlite looks for a semicolon to know when your SQL command is
complete. If you omit the semicolon, sqlite will give you a
continuation prompt and wait for you to enter more text to be
@ -122,10 +119,10 @@ sql>
puts {
<p>
But you cannot execute DROP TABLE, UPDATE, INSERT or DELETE against
the sqlite_master table. At least not directly. The sqlite_master
the sqlite_master table. The sqlite_master
table is updated automatically as you create or drop tables and
indices from the database, but you can not modify sqlite_master
directly.
indices from the database. You can not make manual changes
to the sqlite_master table.
</p>
<h2>Special commands to sqlite</h2>
@ -136,7 +133,7 @@ on to the SQLite library for execution.
But if an input line begins with a dot ("."), then
that line is intercepted and interpreted by the sqlite program itself.
These "dot commands" are typically used to change the output format
of queries, or to execute certain command prepackaged query statements.
of queries, or to execute certain prepackaged query statements.
</p>
<p>
@ -187,8 +184,9 @@ sql>
}
puts {
<p>Line mode used to be the default mode setting. But recently the
default mode was changed to "list".</p>
<p>Line mode used to be the default mode setting. But after some
experience using the utility, it was decided that "list" mode made
a better default and so now the default mode is "list".</p>
}
puts {
@ -221,7 +219,7 @@ sql>
}
puts {
<p>The ".width" command in the example above set the width of the first
<p>The ".width" command in the example above sets the width of the first
column to 12 and the width of the second column to 6. All other column
widths were unaltered. You can gives as many arguments to ".width" as
necessary to specify the widths of as many columns as are in your
@ -246,7 +244,7 @@ list mode, each record of a query result is written on one line of
output and each field within that record is separated by a specific
separator string. The default separator is a pipe symbol ("|").
List mode is especially useful when you are going to send the output
of a query to another program (such as AWK) for additional process.</p>}
of a query to another program (such as AWK) for additional processing.</p>}
Code {
sql> (((.mode list)))
@ -368,8 +366,8 @@ SELECT sql FROM sqlite_master
ORDER BY tbl_name, type DESC, name
</pre></blockquote>
<p>Of, if you give an argument to ".schema" because you only
one the schema for a single table, the query looks like this:</p>
<p>Or, if you give an argument to ".schema" because you only
want the schema for a single table, the query looks like this:</p>
<blockquote><pre>
SELECT sql FROM sqlite_master
@ -385,7 +383,7 @@ to ".schema", of course.</p>
<p>The ".explain" dot command can be used to set the output mode
to "column" and to set the column widths to values that are reasonable
for looking at the output of an EXPLAIN command. The EXPLAIN command
is an SQLite-specific command that is useful for debugging. If any
is an SQLite-specific SQL extension that is useful for debugging. If any
regular SQL is prefaced by EXPLAIN, then the SQL command is parsed and
analyzed but is not executed. Instead, the sequence of virtual machine
instructions that would have been used to execute the SQL command are
@ -397,7 +395,7 @@ sql> (((explain delete from tbl1 where two<20;)))
addr opcode p1 p2 p3
---- ------------ ----- ----- -------------------------------------
0 ListOpen 0 0
1 Open 0 0 tbl1
1 Open 0 1 tbl1
2 Next 0 9
3 Field 0 1
4 Integer 20 0