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
|
<?php
/**
* @version v5.20.14 06-Jan-2019
* @copyright (c) 2000-2013 John Lim (jlim#natsoft.com). All rights reserved.
* @copyright (c) 2014 Damien Regad, Mark Newnham and the ADOdb community
* Released under both BSD license and Lesser GPL library license.
* Whenever there is any discrepancy between the two licenses,
* the BSD license will take precedence.
*
* Set tabs to 4 for best viewing.
*
*/
/*
* Concept from daniel.lucazeau@ajornet.com.
*
* @param db Adodb database connection
* @param tables List of tables to join
* @rowfields List of fields to display on each row
* @colfield Pivot field to slice and display in columns, if we want to calculate
* ranges, we pass in an array (see example2)
* @where Where clause. Optional.
* @aggfield This is the field to sum. Optional.
* Since 2.3.1, if you can use your own aggregate function
* instead of SUM, eg. $aggfield = 'fieldname'; $aggfn = 'AVG';
* @sumlabel Prefix to display in sum columns. Optional.
* @aggfn Aggregate function to use (could be AVG, SUM, COUNT)
* @showcount Show count of records
*
* @returns Sql generated
*/
function PivotTableSQL(&$db,$tables,$rowfields,$colfield, $where=false,
$aggfield = false,$sumlabel='Sum ',$aggfn ='SUM', $showcount = true)
{
if ($aggfield) $hidecnt = true;
else $hidecnt = false;
$iif = strpos($db->databaseType,'access') !== false;
// note - vfp 6 still doesn' work even with IIF enabled || $db->databaseType == 'vfp';
//$hidecnt = false;
if ($where) $where = "\nWHERE $where";
if (!is_array($colfield)) $colarr = $db->GetCol("select distinct $colfield from $tables $where order by 1");
if (!$aggfield) $hidecnt = false;
$sel = "$rowfields, ";
if (is_array($colfield)) {
foreach ($colfield as $k => $v) {
$k = trim($k);
if (!$hidecnt) {
$sel .= $iif ?
"\n\t$aggfn(IIF($v,1,0)) AS \"$k\", "
:
"\n\t$aggfn(CASE WHEN $v THEN 1 ELSE 0 END) AS \"$k\", ";
}
if ($aggfield) {
$sel .= $iif ?
"\n\t$aggfn(IIF($v,$aggfield,0)) AS \"$sumlabel$k\", "
:
"\n\t$aggfn(CASE WHEN $v THEN $aggfield ELSE 0 END) AS \"$sumlabel$k\", ";
}
}
} else {
foreach ($colarr as $v) {
if (!is_numeric($v)) $vq = $db->qstr($v);
else $vq = $v;
$v = trim($v);
if (strlen($v) == 0 ) $v = 'null';
if (!$hidecnt) {
$sel .= $iif ?
"\n\t$aggfn(IIF($colfield=$vq,1,0)) AS \"$v\", "
:
"\n\t$aggfn(CASE WHEN $colfield=$vq THEN 1 ELSE 0 END) AS \"$v\", ";
}
if ($aggfield) {
if ($hidecnt) $label = $v;
else $label = "{$v}_$aggfield";
$sel .= $iif ?
"\n\t$aggfn(IIF($colfield=$vq,$aggfield,0)) AS \"$label\", "
:
"\n\t$aggfn(CASE WHEN $colfield=$vq THEN $aggfield ELSE 0 END) AS \"$label\", ";
}
}
}
if ($aggfield && $aggfield != '1'){
$agg = "$aggfn($aggfield)";
$sel .= "\n\t$agg as \"$sumlabel$aggfield\", ";
}
if ($showcount)
$sel .= "\n\tSUM(1) as Total";
else
$sel = substr($sel,0,strlen($sel)-2);
// Strip aliases
$rowfields = preg_replace('/ AS (\w+)/i', '', $rowfields);
$sql = "SELECT $sel \nFROM $tables $where \nGROUP BY $rowfields";
return $sql;
}
/* EXAMPLES USING MS NORTHWIND DATABASE */
if (0) {
# example1
#
# Query the main "product" table
# Set the rows to CompanyName and QuantityPerUnit
# and the columns to the Categories
# and define the joins to link to lookup tables
# "categories" and "suppliers"
#
$sql = PivotTableSQL(
$gDB, # adodb connection
'products p ,categories c ,suppliers s', # tables
'CompanyName,QuantityPerUnit', # row fields
'CategoryName', # column fields
'p.CategoryID = c.CategoryID and s.SupplierID= p.SupplierID' # joins/where
);
print "<pre>$sql";
$rs = $gDB->Execute($sql);
rs2html($rs);
/*
Generated SQL:
SELECT CompanyName,QuantityPerUnit,
SUM(CASE WHEN CategoryName='Beverages' THEN 1 ELSE 0 END) AS "Beverages",
SUM(CASE WHEN CategoryName='Condiments' THEN 1 ELSE 0 END) AS "Condiments",
SUM(CASE WHEN CategoryName='Confections' THEN 1 ELSE 0 END) AS "Confections",
SUM(CASE WHEN CategoryName='Dairy Products' THEN 1 ELSE 0 END) AS "Dairy Products",
SUM(CASE WHEN CategoryName='Grains/Cereals' THEN 1 ELSE 0 END) AS "Grains/Cereals",
SUM(CASE WHEN CategoryName='Meat/Poultry' THEN 1 ELSE 0 END) AS "Meat/Poultry",
SUM(CASE WHEN CategoryName='Produce' THEN 1 ELSE 0 END) AS "Produce",
SUM(CASE WHEN CategoryName='Seafood' THEN 1 ELSE 0 END) AS "Seafood",
SUM(1) as Total
FROM products p ,categories c ,suppliers s WHERE p.CategoryID = c.CategoryID and s.SupplierID= p.SupplierID
GROUP BY CompanyName,QuantityPerUnit
*/
//=====================================================================
# example2
#
# Query the main "product" table
# Set the rows to CompanyName and QuantityPerUnit
# and the columns to the UnitsInStock for diiferent ranges
# and define the joins to link to lookup tables
# "categories" and "suppliers"
#
$sql = PivotTableSQL(
$gDB, # adodb connection
'products p ,categories c ,suppliers s', # tables
'CompanyName,QuantityPerUnit', # row fields
# column ranges
array(
' 0 ' => 'UnitsInStock <= 0',
"1 to 5" => '0 < UnitsInStock and UnitsInStock <= 5',
"6 to 10" => '5 < UnitsInStock and UnitsInStock <= 10',
"11 to 15" => '10 < UnitsInStock and UnitsInStock <= 15',
"16+" =>'15 < UnitsInStock'
),
' p.CategoryID = c.CategoryID and s.SupplierID= p.SupplierID', # joins/where
'UnitsInStock', # sum this field
'Sum' # sum label prefix
);
print "<pre>$sql";
$rs = $gDB->Execute($sql);
rs2html($rs);
/*
Generated SQL:
SELECT CompanyName,QuantityPerUnit,
SUM(CASE WHEN UnitsInStock <= 0 THEN UnitsInStock ELSE 0 END) AS "Sum 0 ",
SUM(CASE WHEN 0 < UnitsInStock and UnitsInStock <= 5 THEN UnitsInStock ELSE 0 END) AS "Sum 1 to 5",
SUM(CASE WHEN 5 < UnitsInStock and UnitsInStock <= 10 THEN UnitsInStock ELSE 0 END) AS "Sum 6 to 10",
SUM(CASE WHEN 10 < UnitsInStock and UnitsInStock <= 15 THEN UnitsInStock ELSE 0 END) AS "Sum 11 to 15",
SUM(CASE WHEN 15 < UnitsInStock THEN UnitsInStock ELSE 0 END) AS "Sum 16+",
SUM(UnitsInStock) AS "Sum UnitsInStock",
SUM(1) as Total
FROM products p ,categories c ,suppliers s WHERE p.CategoryID = c.CategoryID and s.SupplierID= p.SupplierID
GROUP BY CompanyName,QuantityPerUnit
*/
}
|
