1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
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
133
134
135
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
202
203
204
205
206
207
208
209
210
211
212
213
|
<!DOCTYPE html>
<html><head>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link href="sqlite.css" rel="stylesheet">
<title>The generate_series Table-Valued Function</title>
<!-- path= -->
</head>
<body>
<div class=nosearch>
<a href="index.html">
<img class="logo" src="images/sqlite370_banner.gif" alt="SQLite" border="0">
</a>
<div><!-- IE hack to prevent disappearing logo --></div>
<div class="tagline desktoponly">
Small. Fast. Reliable.<br>Choose any three.
</div>
<div class="menu mainmenu">
<ul>
<li><a href="index.html">Home</a>
<li class='mobileonly'><a href="javascript:void(0)" onclick='toggle_div("submenu")'>Menu</a>
<li class='wideonly'><a href='about.html'>About</a>
<li class='desktoponly'><a href="docs.html">Documentation</a>
<li class='desktoponly'><a href="download.html">Download</a>
<li class='wideonly'><a href='copyright.html'>License</a>
<li class='desktoponly'><a href="support.html">Support</a>
<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_search()'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>
<li><a href='about.html'>About</a>
<li><a href='docs.html'>Documentation</a>
<li><a href='download.html'>Download</a>
<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<select name="s" id="searchtype">
<option value="d">Search Documentation</option>
<option value="c">Search Changelog</option>
</select>
<input type="text" name="q" id="searchbox" value="">
<input type="submit" value="Go">
</form>
</div>
</div>
<script>
function toggle_div(nm) {
var w = document.getElementById(nm);
if( w.style.display=="block" ){
w.style.display = "none";
}else{
w.style.display = "block";
}
}
function toggle_search() {
var w = document.getElementById("searchmenu");
if( w.style.display=="block" ){
w.style.display = "none";
} else {
w.style.display = "block";
setTimeout(function(){
document.getElementById("searchbox").focus()
}, 30);
}
}
function div_off(nm){document.getElementById(nm).style.display="none";}
window.onbeforeunload = function(e){div_off("submenu");}
/* Disable the Search feature if we are not operating from CGI, since */
/* Search is accomplished using CGI and will not work without it. */
if( !location.origin || !location.origin.match || !location.origin.match(/http/) ){
document.getElementById("search_menubutton").style.display = "none";
}
/* Used by the Hide/Show button beside syntax diagrams, to toggle the */
function hideorshow(btn,obj){
var x = document.getElementById(obj);
var b = document.getElementById(btn);
if( x.style.display!='none' ){
x.style.display = 'none';
b.innerHTML='show';
}else{
x.style.display = '';
b.innerHTML='hide';
}
return false;
}
var antiRobot = 0;
function antiRobotGo(){
if( antiRobot!=3 ) return;
antiRobot = 7;
var j = document.getElementById("mtimelink");
if(j && j.hasAttribute("data-href")) j.href=j.getAttribute("data-href");
}
function antiRobotDefense(){
document.body.onmousedown=function(){
antiRobot |= 2;
antiRobotGo();
document.body.onmousedown=null;
}
document.body.onmousemove=function(){
antiRobot |= 2;
antiRobotGo();
document.body.onmousemove=null;
}
setTimeout(function(){
antiRobot |= 1;
antiRobotGo();
}, 100)
antiRobotGo();
}
antiRobotDefense();
</script>
<div class=fancy>
<div class=nosearch>
<div class="fancy_title">
The generate_series Table-Valued Function
</div>
<div class="fancy_toc">
<a onclick="toggle_toc()">
<span class="fancy_toc_mark" id="toc_mk">►</span>
Table Of Contents
</a>
<div id="toc_sub"><div class="fancy-toc1"><a href="#overview">1. Overview</a></div>
<div class="fancy-toc2"><a href="#equivalent_recursive_common_table_expression">1.1. Equivalent Recursive Common Table Expression</a></div>
<div class="fancy-toc1"><a href="#usage_examples">2. Usage Examples</a></div>
</div>
</div>
<script>
function toggle_toc(){
var sub = document.getElementById("toc_sub")
var mk = document.getElementById("toc_mk")
if( sub.style.display!="block" ){
sub.style.display = "block";
mk.innerHTML = "▼";
} else {
sub.style.display = "none";
mk.innerHTML = "►";
}
}
</script>
</div>
<h1 id="overview"><span>1. </span>Overview</h1>
<p>The generate_series(START,END,STEP) <a href="vtab.html#tabfunc2">table-valued function</a> is a
<a href="loadext.html">loadable extension</a> included in the SQLite source tree, and compiled into
the <a href="cli.html">command-line shell</a>. The generate_series() table has a single
result column named "value" holding integer values
and a number of rows determined by the
parameters START, END, and STEP. The first row of the table has
a value of START. Subsequent rows increase by STEP up to END.
</p><p>Omitted parameters take on default values. STEP defaults to 1.
END defaults to 9223372036854775807. The START parameter is required
as of version 3.37.0 (2021-11-27) and later and an error will
be raised if START is omitted or has a self-referential or otherwise
uncomputable value. Older versions used a default of 0 for START.
The legacy behavior can be obtained from recent code by compiling
with -DZERO_ARGUMENT_GENERATE_SERIES.
</p><h2 id="equivalent_recursive_common_table_expression"><span>1.1. </span>Equivalent Recursive Common Table Expression</h2>
<p>The generate_series table can be simulated using a
<a href="lang_with.html#recursivecte">recursive common table expression</a>. If the three parameters
are $start, $end, and $step, then the equivalent common table
expression is:
</p><div class="codeblock"><pre>WITH RECURSIVE generate_series(value) AS (
SELECT $start
UNION ALL
SELECT value+$step FROM generate_series
WHERE value+$step<=$end
) ...
</pre></div>
<p>The common table expression works without having to load an
extension. On the other hand, the extension is easier to program
and faster.
</p><h1 id="usage_examples"><span>2. </span>Usage Examples</h1>
<p>Generate all multiples of 5 less than or equal to 100:
</p><div class="codeblock"><pre>SELECT value FROM generate_series(5,100,5);
</pre></div>
<p>Generate the 20 random integer values:
</p><div class="codeblock"><pre>SELECT random() FROM generate_series(1,20);
</pre></div>
<p>Find the name of every customer whose account number
is an even multiple of 100 between 10000 and 20000.
</p><div class="codeblock"><pre>SELECT customer.name
FROM customer, generate_series(10000,20000,100)
WHERE customer.id=value;
/* or */
SELECT name FROM customer
WHERE id IN (SELECT value
FROM generate_series(10000,20000,200));
</pre></div>
<p align="center"><small><i>This page last modified on <a href="https://sqlite.org/docsrc/honeypot" id="mtimelink" data-href="https://sqlite.org/docsrc/finfo/pages/series.in?m=2ef7ed3d3eec2b729">2022-01-20 21:38:08</a> UTC </small></i></p>
|
