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Overview
| Comment: | :-) (CVS 88) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
3252269e9005fe3f31f285506430e33d |
| User & Date: | drh 2000-06-09 03:47:19 |
Context
|
2000-06-09
| ||
| 03:51 | :-) (CVS 89) (check-in: 8de283de user: drh tags: trunk) | |
| 03:47 | :-) (CVS 88) (check-in: 3252269e user: drh tags: trunk) | |
| 01:58 | :-) (CVS 87) (check-in: 3661b5ff user: drh tags: trunk) | |
Changes
Changes to www/index.tcl.
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#
# Run this TCL script to generate HTML for the index.html file.
#
set rcsid {$Id: index.tcl,v 1.15 2000/06/08 19:38:36 drh Exp $}
puts {<html>
<head><title>SQLite: An SQL Database Engine Built Atop GDBM</title></head>
<body bgcolor=white>
<h1 align=center>SQLite: An SQL Database Engine Built Atop
<a href="http://www.gnu.org/software/gdbm/gdbm.html">GDBM</a></h1>
<p align=center>}
................................................................................
<p>The following documentation is currently available:</p>
<p><ul>
<li>Information on the <a href="sqlite.html">sqlite</a>
command-line utility.</li>
<li>The <a href="c_interface.html">C/C++ Interface</a>.</li>
<li>The <a href="fileformat.html">file format</a> used by SQLite databases.</li>
</ul>
</p>
<p>The SQLite source code is 35% comment. These comments are
another important source of information. </p>
}
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>
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>
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#
# Run this TCL script to generate HTML for the index.html file.
#
set rcsid {$Id: index.tcl,v 1.16 2000/06/09 03:47:19 drh Exp $}
puts {<html>
<head><title>SQLite: An SQL Database Engine Built Atop GDBM</title></head>
<body bgcolor=white>
<h1 align=center>SQLite: An SQL Database Engine Built Atop
<a href="http://www.gnu.org/software/gdbm/gdbm.html">GDBM</a></h1>
<p align=center>}
................................................................................
<p>The following documentation is currently available:</p>
<p><ul>
<li>Information on the <a href="sqlite.html">sqlite</a>
command-line utility.</li>
<li>The <a href="c_interface.html">C/C++ Interface</a>.</li>
<li>The <a href="fileformat.html">file format</a> used by SQLite databases.</li>
<li>The <a href="arch.html">Architecture of the SQLite Library</a> describes
how the library is put together. <b>(preliminary)</b></li>
<li>The <a href="lang.html">SQL Language</a> subset understood by SQLite.
<b>(under development)</b></li>
</ul>
</p>
<p>The SQLite source code is 35% comment. These comments are
another important source of information. </p>
}
|
Changes to www/lang.tcl.
1 2 3 4 5 6 7 8 9 10 11 .. 42 43 44 45 46 47 48 49 50 51 52 53 54 55 .. 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 .. 80 81 82 83 84 85 86 87 88 89 90 91 92 93 ... 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 ... 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 |
#
# Run this Tcl script to generate the sqlite.html file.
#
set rcsid {$Id: lang.tcl,v 1.2 2000/06/09 01:58:37 drh Exp $}
puts {<html>
<head>
<title>Query Language Understood By SQLite</title>
</head>
<body bgcolor=white>
<h1 align=center>
................................................................................
{{DROP TABLE} droptable}
{{DROP INDEX} dropindex}
{INSERT insert}
{DELETE delete}
{UPDATE update}
{SELECT select}
{COPY copy}
}] {
puts "<li><a href=\"#[lindex $section 1]\">[lindex $section 0]</a></li>"
}
puts {</ul></p>
<p>Details on the implementation of each command are provided in
the sequel.</p>
................................................................................
regsub -all < $body {%LT} body
regsub -all > $body {%GT} body
regsub -all %LT $body {</font></b><i><font color="#ff3434">} body
regsub -all %GT $body {</font></i><b><font color="#2c2cf0">} body
regsub -all {[]|[*?]} $body {</font></b>&<b><font color="#2c2cf0">} body
regsub -all "\n" [string trim $body] "<br>\n" body
regsub -all "\n *" $body "\n\\ \\ \\ \\ " body
regsub -all {[|,*()]} $body {<big>&</big>} body
puts "<td><b><font color=\"#2c2cf0\">$body</font></b></td></tr>"
}
puts {</table>}
}
proc Section {name {label {}}} {
puts "\n<hr />"
................................................................................
}
puts "<h1>$name</h1>\n"
}
proc Example {text} {
puts "<blockquote><pre>$text</pre></blockquote>"
}
Section {CREATE TABLE} {createtable}
Syntax {sql-command} {
CREATE TABLE <table-name> (
<column-def> [, <column-def>]*
[, <constraint>]*
................................................................................
<p>The exact text
of each CREATE TABLE statement is stored in the <b>sqlite_master</b>
table. Everytime the database is opened, all CREATE TABLE statements
are read from the <b>sqlite_master</b> table and used to regenerate
SQLite's internal representation of the table layout.</p>
}
Section {CREATE INDEX} createindex
Syntax {sql-statement} {
CREATE INDEX <index-name>
ON <table-name> ( <column-name> [, <column-name>]* )
} {column-name} {
<name> [ ASC | DESC ]
}
puts {
<p>The CREATE INDEX command consists of the keywords "CREATE INDEX" followed
by the name of the new index, the keyword "ON" the name of a previously
created table that is to be indexed, and a parenthesized list of names of
columns in the table that are used for the index key.
Each column name can be followed by one of the "ASC" or "DESC" keywords
to indicate sort order, but since GDBM does not implement ordered keys,
these keywords are ignored.</p>
<p>There are no arbitrary limits on the number of indices that can be
attached to a single table, nor on the number of columns in an index.</p>
<p>The exact text
of each CREATE INDEX statement is stored in the <b>sqlite_master</b>
table. Everytime the database is opened, all CREATE INDEX statements
are read from the <b>sqlite_master</b> table and used to regenerate
SQLite's internal representation of the index layout.</p>
}
Section {DROP TABLE} droptable
Syntax {sql-command} {
DROP TABLE <table-name>
}
puts {
<p>The DROP TABLE statement consists of the keywords "DROP TABLE" followed
by the name of the table. The table named is completely removed from
the disk. The table can not be recovered. All indices associated with
the table are also reversibly deleted.</p>}
Section {DROP INDEX} dropindex
Syntax {sql-command} {
DROP INDEX <index-name>
}
puts {
<p>The DROP INDEX statement consists of the keywords "DROP INDEX" followed
by the name of the index. The index named is completely removed from
the disk. The only way to recover the index is to reenter the
appropriate CREATE INDEX command.</p>
}
Section VACUUM vacuum
Syntax {sql-statement} {
VACUUM [<index-or-table-name>]
}
................................................................................
<p>It is a good idea to run VACUUM after creating large indices,
especially indices where a single index value refers to many
entries in the data table. Reorganizing these indices will make
the underlying GDBM file much smaller and will help queries to
run much faster.</p>
}
Section INSERT insert
Syntax {sql-statement} {
INSERT INTO <table-name> [( <column-list> )] VALUES ( <value-list> ) |
INSERT INTO <table-name> [( <column-list> )] <select-statement>
}
puts {
<p>The INSERT statement comes in two basic forms. The first form
(with the "VALUES" keyword) creates a single new row in an existing table.
If no column-list is specified then the number of values must
be the same as the number of columns in the table. If a column-list
is specified, then the number of values must match the number of
specified columns
</p>
}
puts {
<p><hr /></p>
<p><a href="index.html"><img src="/goback.jpg" border=0 />
Back to the SQLite Home Page</a>
</p>
</body></html>}
|
| > > | > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | | < < < > > > | < < < < < < < < > > | < < < < < | > > > > > | | | | > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | < < < < < < < < < < < < < < < < | |
1 2 3 4 5 6 7 8 9 10 11 .. 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 .. 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 .. 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 ... 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 ... 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 |
#
# Run this Tcl script to generate the sqlite.html file.
#
set rcsid {$Id: lang.tcl,v 1.3 2000/06/09 03:47:19 drh Exp $}
puts {<html>
<head>
<title>Query Language Understood By SQLite</title>
</head>
<body bgcolor=white>
<h1 align=center>
................................................................................
{{DROP TABLE} droptable}
{{DROP INDEX} dropindex}
{INSERT insert}
{DELETE delete}
{UPDATE update}
{SELECT select}
{COPY copy}
{EXPLAIN explain}
{expressions expr}
}] {
puts "<li><a href=\"#[lindex $section 1]\">[lindex $section 0]</a></li>"
}
puts {</ul></p>
<p>Details on the implementation of each command are provided in
the sequel.</p>
................................................................................
regsub -all < $body {%LT} body
regsub -all > $body {%GT} body
regsub -all %LT $body {</font></b><i><font color="#ff3434">} body
regsub -all %GT $body {</font></i><b><font color="#2c2cf0">} body
regsub -all {[]|[*?]} $body {</font></b>&<b><font color="#2c2cf0">} body
regsub -all "\n" [string trim $body] "<br>\n" body
regsub -all "\n *" $body "\n\\ \\ \\ \\ " body
regsub -all {[|,.*()]} $body {<big>&</big>} body
regsub -all { = } $body { <big>=</big> } body
regsub -all {STAR} $body {<big>*</big>} body
puts "<td><b><font color=\"#2c2cf0\">$body</font></b></td></tr>"
}
puts {</table>}
}
proc Section {name {label {}}} {
puts "\n<hr />"
................................................................................
}
puts "<h1>$name</h1>\n"
}
proc Example {text} {
puts "<blockquote><pre>$text</pre></blockquote>"
}
Section COPY copy
Syntax {sql-statement} {
COPY <table-name> FROM <string>
}
Section {CREATE INDEX} createindex
Syntax {sql-statement} {
CREATE INDEX <index-name>
ON <table-name> ( <column-name> [, <column-name>]* )
} {column-name} {
<name> [ ASC | DESC ]
}
puts {
<p>The CREATE INDEX command consists of the keywords "CREATE INDEX" followed
by the name of the new index, the keyword "ON" the name of a previously
created table that is to be indexed, and a parenthesized list of names of
columns in the table that are used for the index key.
Each column name can be followed by one of the "ASC" or "DESC" keywords
to indicate sort order, but since GDBM does not implement ordered keys,
these keywords are ignored.</p>
<p>There are no arbitrary limits on the number of indices that can be
attached to a single table, nor on the number of columns in an index.</p>
<p>The exact text
of each CREATE INDEX statement is stored in the <b>sqlite_master</b>
table. Everytime the database is opened, all CREATE INDEX statements
are read from the <b>sqlite_master</b> table and used to regenerate
SQLite's internal representation of the index layout.</p>
}
Section {CREATE TABLE} {createtable}
Syntax {sql-command} {
CREATE TABLE <table-name> (
<column-def> [, <column-def>]*
[, <constraint>]*
................................................................................
<p>The exact text
of each CREATE TABLE statement is stored in the <b>sqlite_master</b>
table. Everytime the database is opened, all CREATE TABLE statements
are read from the <b>sqlite_master</b> table and used to regenerate
SQLite's internal representation of the table layout.</p>
}
Section DELETE delete
Syntax {sql-statement} {
DELETE FROM <table-name> [WHERE <expression>]
}
puts {
<p></p>
}
Section {DROP INDEX} dropindex
Syntax {sql-command} {
DROP INDEX <index-name>
}
puts {
<p>The DROP INDEX statement consists of the keywords "DROP INDEX" followed
by the name of the index. The index named is completely removed from
the disk. The only way to recover the index is to reenter the
appropriate CREATE INDEX command.</p>
}
Section {DROP TABLE} droptable
Syntax {sql-command} {
DROP TABLE <table-name>
}
puts {
<p>The DROP TABLE statement consists of the keywords "DROP TABLE" followed
by the name of the table. The table named is completely removed from
the disk. The table can not be recovered. All indices associated with
the table are also reversibly deleted.</p>}
Section EXPLAIN explain
Syntax {sql-statement} {
EXPLAIN <sql-statement>
}
Section expression expr
Syntax {expression} {
<expression> <binary-op> <expression> |
<expression> <like-op> <expression> |
<unary-op> <expression> |
( <expression> ) |
<column-name> |
<table-name> . <column-name> |
<literal-value> |
<function-name> ( <expr-list> | STAR ) |
<expression> ISNULL |
<expression> NOTNULL |
<expression> BETWEEN <expression> AND <expression> |
<expression> IN ( <value-list> ) |
<expression> IN ( <select> ) |
( <select> )
} {like-op} {
LIKE | GLOB | NOT LIKE | NOT GLOB
}
Section INSERT insert
Syntax {sql-statement} {
INSERT INTO <table-name> [( <column-list> )] VALUES ( <value-list> ) |
INSERT INTO <table-name> [( <column-list> )] <select-statement>
}
puts {
<p>The INSERT statement comes in two basic forms. The first form
(with the "VALUES" keyword) creates a single new row in an existing table.
If no column-list is specified then the number of values must
be the same as the number of columns in the table. If a column-list
is specified, then the number of values must match the number of
specified columns. Columns of the table that do not appear in the
column list are fill with the default value, or with NULL if not
default value is specified.
</p>
<p>The second form of the INSERT statement takes it data from a
SELECT statement. The number of columns in the result of the
SELECT must exactly match the number of columns in the table if
no column list is specified, or it must match the number of columns
name in the column list. A new entry is made in the table
for every row of the SELECT result. The SELECT may be simple
or compound. If the SELECT statement has an ORDER BY clause,
the ORDER BY is ignored.</p>
}
Section SELECT select
Syntax {sql-statement} {
SELECT <result> FROM <table-list>
[WHERE <expression>]
[GROUP BY <expr-list>]
[HAVING <expression>]
[<compound-op> <select>]*
[ORDER BY <sort-expr-list>]
} {result} {
STAR | <expresssion> [, <expression>]*
} {table-list} {
<table-name> [, <table-name>]*
} {sort-expr-list} {
<expr> [<sort-order>] [, <expr> [<sort-order>]]*
} {sort-order} {
ASC | DESC
} {compound_op} {
UNION | UNION ALL | INTERSECT | EXCEPT
}
Section UPDATE update
Syntax {sql-statement} {
UPDATE <table-name> SET <assignment> [, <assignment>] [WHERE <expression>]
} {assignment} {
<column-name> = <expression>
}
puts {
<p>
}
Section VACUUM vacuum
Syntax {sql-statement} {
VACUUM [<index-or-table-name>]
}
................................................................................
<p>It is a good idea to run VACUUM after creating large indices,
especially indices where a single index value refers to many
entries in the data table. Reorganizing these indices will make
the underlying GDBM file much smaller and will help queries to
run much faster.</p>
}
puts {
<p></p>
}
puts {
<p><hr /></p>
<p><a href="index.html"><img src="/goback.jpg" border=0 />
Back to the SQLite Home Page</a>
</p>
</body></html>}
|