[2] | 1 | <?php |
---|
| 2 | /** |
---|
[34] | 3 | * @version V4.93 10 Oct 2006 (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved. |
---|
[2] | 4 | * Released under both BSD license and Lesser GPL library license. |
---|
| 5 | * Whenever there is any discrepancy between the two licenses, |
---|
| 6 | * the BSD license will take precedence. |
---|
| 7 | * |
---|
| 8 | * Set tabs to 4 for best viewing. |
---|
| 9 | * |
---|
| 10 | */ |
---|
| 11 | |
---|
| 12 | /* |
---|
| 13 | * Concept from daniel.lucazeau@ajornet.com. |
---|
| 14 | * |
---|
| 15 | * @param db Adodb database connection |
---|
| 16 | * @param tables List of tables to join |
---|
| 17 | * @rowfields List of fields to display on each row |
---|
| 18 | * @colfield Pivot field to slice and display in columns, if we want to calculate |
---|
| 19 | * ranges, we pass in an array (see example2) |
---|
| 20 | * @where Where clause. Optional. |
---|
| 21 | * @aggfield This is the field to sum. Optional. |
---|
| 22 | * Since 2.3.1, if you can use your own aggregate function |
---|
[34] | 23 | * instead of SUM, eg. $aggfield = 'fieldname'; $aggfn = 'AVG'; |
---|
[2] | 24 | * @sumlabel Prefix to display in sum columns. Optional. |
---|
| 25 | * @aggfn Aggregate function to use (could be AVG, SUM, COUNT) |
---|
| 26 | * @showcount Show count of records |
---|
| 27 | * |
---|
| 28 | * @returns Sql generated |
---|
| 29 | */ |
---|
| 30 | |
---|
[34] | 31 | function PivotTableSQL(&$db,$tables,$rowfields,$colfield, $where=false, |
---|
[2] | 32 | $aggfield = false,$sumlabel='Sum ',$aggfn ='SUM', $showcount = true) |
---|
| 33 | { |
---|
| 34 | if ($aggfield) $hidecnt = true; |
---|
| 35 | else $hidecnt = false; |
---|
| 36 | |
---|
[34] | 37 | $iif = strpos($db->databaseType,'access') !== false; |
---|
| 38 | // note - vfp 6 still doesn' work even with IIF enabled || $db->databaseType == 'vfp'; |
---|
[2] | 39 | |
---|
| 40 | //$hidecnt = false; |
---|
| 41 | |
---|
| 42 | if ($where) $where = "\nWHERE $where"; |
---|
| 43 | if (!is_array($colfield)) $colarr = $db->GetCol("select distinct $colfield from $tables $where order by 1"); |
---|
| 44 | if (!$aggfield) $hidecnt = false; |
---|
| 45 | |
---|
| 46 | $sel = "$rowfields, "; |
---|
| 47 | if (is_array($colfield)) { |
---|
| 48 | foreach ($colfield as $k => $v) { |
---|
[34] | 49 | $k = trim($k); |
---|
| 50 | if (!$hidecnt) { |
---|
| 51 | $sel .= $iif ? |
---|
| 52 | "\n\t$aggfn(IIF($v,1,0)) AS \"$k\", " |
---|
| 53 | : |
---|
| 54 | "\n\t$aggfn(CASE WHEN $v THEN 1 ELSE 0 END) AS \"$k\", "; |
---|
| 55 | } |
---|
| 56 | if ($aggfield) { |
---|
| 57 | $sel .= $iif ? |
---|
| 58 | "\n\t$aggfn(IIF($v,$aggfield,0)) AS \"$sumlabel$k\", " |
---|
| 59 | : |
---|
| 60 | "\n\t$aggfn(CASE WHEN $v THEN $aggfield ELSE 0 END) AS \"$sumlabel$k\", "; |
---|
| 61 | } |
---|
[2] | 62 | } |
---|
| 63 | } else { |
---|
| 64 | foreach ($colarr as $v) { |
---|
| 65 | if (!is_numeric($v)) $vq = $db->qstr($v); |
---|
| 66 | else $vq = $v; |
---|
[34] | 67 | $v = trim($v); |
---|
[2] | 68 | if (strlen($v) == 0 ) $v = 'null'; |
---|
[34] | 69 | if (!$hidecnt) { |
---|
| 70 | $sel .= $iif ? |
---|
| 71 | "\n\t$aggfn(IIF($colfield=$vq,1,0)) AS \"$v\", " |
---|
| 72 | : |
---|
| 73 | "\n\t$aggfn(CASE WHEN $colfield=$vq THEN 1 ELSE 0 END) AS \"$v\", "; |
---|
| 74 | } |
---|
[2] | 75 | if ($aggfield) { |
---|
| 76 | if ($hidecnt) $label = $v; |
---|
| 77 | else $label = "{$v}_$aggfield"; |
---|
[34] | 78 | $sel .= $iif ? |
---|
| 79 | "\n\t$aggfn(IIF($colfield=$vq,$aggfield,0)) AS \"$label\", " |
---|
| 80 | : |
---|
| 81 | "\n\t$aggfn(CASE WHEN $colfield=$vq THEN $aggfield ELSE 0 END) AS \"$label\", "; |
---|
[2] | 82 | } |
---|
| 83 | } |
---|
| 84 | } |
---|
| 85 | if ($aggfield && $aggfield != '1'){ |
---|
| 86 | $agg = "$aggfn($aggfield)"; |
---|
| 87 | $sel .= "\n\t$agg as \"$sumlabel$aggfield\", "; |
---|
| 88 | } |
---|
| 89 | |
---|
| 90 | if ($showcount) |
---|
| 91 | $sel .= "\n\tSUM(1) as Total"; |
---|
| 92 | else |
---|
| 93 | $sel = substr($sel,0,strlen($sel)-2); |
---|
| 94 | |
---|
[34] | 95 | |
---|
| 96 | // Strip aliases |
---|
| 97 | $rowfields = preg_replace('/ AS (\w+)/i', '', $rowfields); |
---|
| 98 | |
---|
[2] | 99 | $sql = "SELECT $sel \nFROM $tables $where \nGROUP BY $rowfields"; |
---|
[34] | 100 | |
---|
[2] | 101 | return $sql; |
---|
| 102 | } |
---|
| 103 | |
---|
| 104 | /* EXAMPLES USING MS NORTHWIND DATABASE */ |
---|
| 105 | if (0) { |
---|
| 106 | |
---|
| 107 | # example1 |
---|
| 108 | # |
---|
| 109 | # Query the main "product" table |
---|
| 110 | # Set the rows to CompanyName and QuantityPerUnit |
---|
| 111 | # and the columns to the Categories |
---|
| 112 | # and define the joins to link to lookup tables |
---|
| 113 | # "categories" and "suppliers" |
---|
| 114 | # |
---|
| 115 | |
---|
| 116 | $sql = PivotTableSQL( |
---|
| 117 | $gDB, # adodb connection |
---|
| 118 | 'products p ,categories c ,suppliers s', # tables |
---|
| 119 | 'CompanyName,QuantityPerUnit', # row fields |
---|
| 120 | 'CategoryName', # column fields |
---|
| 121 | 'p.CategoryID = c.CategoryID and s.SupplierID= p.SupplierID' # joins/where |
---|
| 122 | ); |
---|
| 123 | print "<pre>$sql"; |
---|
| 124 | $rs = $gDB->Execute($sql); |
---|
| 125 | rs2html($rs); |
---|
| 126 | |
---|
| 127 | /* |
---|
| 128 | Generated SQL: |
---|
| 129 | |
---|
| 130 | SELECT CompanyName,QuantityPerUnit, |
---|
| 131 | SUM(CASE WHEN CategoryName='Beverages' THEN 1 ELSE 0 END) AS "Beverages", |
---|
| 132 | SUM(CASE WHEN CategoryName='Condiments' THEN 1 ELSE 0 END) AS "Condiments", |
---|
| 133 | SUM(CASE WHEN CategoryName='Confections' THEN 1 ELSE 0 END) AS "Confections", |
---|
| 134 | SUM(CASE WHEN CategoryName='Dairy Products' THEN 1 ELSE 0 END) AS "Dairy Products", |
---|
| 135 | SUM(CASE WHEN CategoryName='Grains/Cereals' THEN 1 ELSE 0 END) AS "Grains/Cereals", |
---|
| 136 | SUM(CASE WHEN CategoryName='Meat/Poultry' THEN 1 ELSE 0 END) AS "Meat/Poultry", |
---|
| 137 | SUM(CASE WHEN CategoryName='Produce' THEN 1 ELSE 0 END) AS "Produce", |
---|
| 138 | SUM(CASE WHEN CategoryName='Seafood' THEN 1 ELSE 0 END) AS "Seafood", |
---|
| 139 | SUM(1) as Total |
---|
| 140 | FROM products p ,categories c ,suppliers s WHERE p.CategoryID = c.CategoryID and s.SupplierID= p.SupplierID |
---|
| 141 | GROUP BY CompanyName,QuantityPerUnit |
---|
| 142 | */ |
---|
| 143 | //===================================================================== |
---|
| 144 | |
---|
| 145 | # example2 |
---|
| 146 | # |
---|
| 147 | # Query the main "product" table |
---|
| 148 | # Set the rows to CompanyName and QuantityPerUnit |
---|
[34] | 149 | # and the columns to the UnitsInStock for diiferent ranges |
---|
[2] | 150 | # and define the joins to link to lookup tables |
---|
| 151 | # "categories" and "suppliers" |
---|
| 152 | # |
---|
| 153 | $sql = PivotTableSQL( |
---|
| 154 | $gDB, # adodb connection |
---|
| 155 | 'products p ,categories c ,suppliers s', # tables |
---|
| 156 | 'CompanyName,QuantityPerUnit', # row fields |
---|
| 157 | # column ranges |
---|
| 158 | array( |
---|
| 159 | ' 0 ' => 'UnitsInStock <= 0', |
---|
| 160 | "1 to 5" => '0 < UnitsInStock and UnitsInStock <= 5', |
---|
| 161 | "6 to 10" => '5 < UnitsInStock and UnitsInStock <= 10', |
---|
| 162 | "11 to 15" => '10 < UnitsInStock and UnitsInStock <= 15', |
---|
| 163 | "16+" =>'15 < UnitsInStock' |
---|
| 164 | ), |
---|
| 165 | ' p.CategoryID = c.CategoryID and s.SupplierID= p.SupplierID', # joins/where |
---|
| 166 | 'UnitsInStock', # sum this field |
---|
| 167 | 'Sum' # sum label prefix |
---|
| 168 | ); |
---|
| 169 | print "<pre>$sql"; |
---|
| 170 | $rs = $gDB->Execute($sql); |
---|
| 171 | rs2html($rs); |
---|
| 172 | /* |
---|
| 173 | Generated SQL: |
---|
| 174 | |
---|
| 175 | SELECT CompanyName,QuantityPerUnit, |
---|
| 176 | SUM(CASE WHEN UnitsInStock <= 0 THEN UnitsInStock ELSE 0 END) AS "Sum 0 ", |
---|
| 177 | SUM(CASE WHEN 0 < UnitsInStock and UnitsInStock <= 5 THEN UnitsInStock ELSE 0 END) AS "Sum 1 to 5", |
---|
| 178 | SUM(CASE WHEN 5 < UnitsInStock and UnitsInStock <= 10 THEN UnitsInStock ELSE 0 END) AS "Sum 6 to 10", |
---|
| 179 | SUM(CASE WHEN 10 < UnitsInStock and UnitsInStock <= 15 THEN UnitsInStock ELSE 0 END) AS "Sum 11 to 15", |
---|
| 180 | SUM(CASE WHEN 15 < UnitsInStock THEN UnitsInStock ELSE 0 END) AS "Sum 16+", |
---|
| 181 | SUM(UnitsInStock) AS "Sum UnitsInStock", |
---|
| 182 | SUM(1) as Total |
---|
| 183 | FROM products p ,categories c ,suppliers s WHERE p.CategoryID = c.CategoryID and s.SupplierID= p.SupplierID |
---|
| 184 | GROUP BY CompanyName,QuantityPerUnit |
---|
| 185 | */ |
---|
| 186 | } |
---|
| 187 | ?> |
---|