我想从一个MySQL数据库的所有表的所有字段搜索一个给定的字符串，可能使用语法为:
SELECT * FROM * WHERE * LIKE '%stuff%'
有可能做这样的事情吗?
当前回答
我也做了我自己的mysql爬虫来搜索一些wordpress配置，在界面和数据库中都无法找到它，数据库转储太沉重和不可读。我得说我现在不能没有它。
它的工作原理类似于@Olivier，但它管理外来的数据库/表名，并且是像小丑一样安全。
<?php
$database = 'database';
$criteria = '*iemblo'; // you can use * and ? as jokers
$dbh = new PDO("mysql:host=127.0.0.1;dbname={$database};charset=utf8", 'root', '');
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$tables = $dbh->query("SHOW TABLES");
while (($table = $tables->fetch(PDO::FETCH_NUM)) !== false)
{
$fields = $dbh->prepare("SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = ? AND TABLE_NAME = ?");
$fields->execute(array ($database, $table[0]));
$ors = array ();
while (($field = $fields->fetch(PDO::FETCH_NUM)) !== false)
{
$ors[] = str_replace("`", "``", $field[0]) . " LIKE REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(:search, '\\\\', '\\\\\\\\'), '%', '\\%'), '_', '\\_'), '*', '%'), '?', '_')";
}
$request = 'SELECT * FROM ';
$request .= str_replace("`", "``", $table[0]);
$request .= ' WHERE ';
$request .= implode(' OR ', $ors);
$rows = $dbh->prepare($request);
$rows->execute(array ('search' => $criteria));
$count = $rows->rowCount();
if ($count == 0)
{
continue;
}
$str = "Table '{$table[0]}' contains {$count} rows matching '{$criteria}'.";
echo str_repeat('-', strlen($str)), PHP_EOL;
echo $str, PHP_EOL;
echo str_repeat('-', strlen($str)), PHP_EOL;
$counter = 1;
while (($row = $rows->fetch(PDO::FETCH_ASSOC)) !== false)
{
$col = 0;
$title = "Row #{$counter}:";
echo $title;
foreach ($row as $column => $value)
{
echo
(($col++ > 0) ? str_repeat(' ', strlen($title) + 1) : ' '),
$column, ': ',
trim(preg_replace('!\s+!', ' ', str_replace(array ("\r", "\t", "\n"), array ("", "", " "), $value))),
PHP_EOL;
}
echo PHP_EOL;
$counter++;
}
}
运行这个脚本可以输出如下内容:
---------------------------------------------------
Table 'customers' contains 1 rows matching '*iemblo'.
---------------------------------------------------
Row #1: email_client: my@email.com
numero_client_compta: C05135
nom_client: Tiemblo
adresse_facturation_1: 151, My Street
adresse_facturation_2:
ville_facturation: Nantes
code_postal_facturation: 44300
pays_facturation: FR
numero_tva_client:
zone_geographique: UE
prenom_client: Alain
commentaires:
nom_societe:
email_facturation: my@email.com
其他回答
这是我的解决方案
DROP PROCEDURE IF EXISTS findAll;
CREATE PROCEDURE `findAll`( IN `tableName` VARCHAR( 28 ) , IN `search` TEXT )
BEGIN
DECLARE finished INT DEFAULT FALSE ;
DECLARE columnName VARCHAR ( 28 ) ;
DECLARE stmtFields TEXT ;
DECLARE columnNames CURSOR FOR
SELECT DISTINCT `COLUMN_NAME` FROM `information_schema`.`COLUMNS`
WHERE `TABLE_NAME` = tableName ORDER BY `ORDINAL_POSITION` ;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET finished = TRUE;
SET stmtFields = '' ;
OPEN columnNames ;
readColumns: LOOP
FETCH columnNames INTO columnName ;
IF finished THEN
LEAVE readColumns ;
END IF;
SET stmtFields = CONCAT(
stmtFields , IF ( LENGTH( stmtFields ) > 0 , ' OR' , '' ) ,
' `', tableName ,'`.`' , columnName , '` REGEXP "' , search , '"'
) ;
END LOOP;
SET @stmtQuery := CONCAT ( 'SELECT * FROM `' , tableName , '` WHERE ' , stmtFields ) ;
PREPARE stmt FROM @stmtQuery ;
EXECUTE stmt ;
CLOSE columnNames ;
END;
如果你安装了phpMyAdmin，使用它的“搜索”功能。
选择您的数据库 确保你有一个DB选择(即不是一个表，否则你会得到一个完全不同的搜索对话框) 点击“搜索”标签 选择您想要的搜索词 选择要搜索的表
我在250个表/10GB的数据库上使用过这个功能(在一个快速的服务器上)，响应时间非常惊人。
我也做了我自己的mysql爬虫来搜索一些wordpress配置，在界面和数据库中都无法找到它，数据库转储太沉重和不可读。我得说我现在不能没有它。
它的工作原理类似于@Olivier，但它管理外来的数据库/表名，并且是像小丑一样安全。
<?php
$database = 'database';
$criteria = '*iemblo'; // you can use * and ? as jokers
$dbh = new PDO("mysql:host=127.0.0.1;dbname={$database};charset=utf8", 'root', '');
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$tables = $dbh->query("SHOW TABLES");
while (($table = $tables->fetch(PDO::FETCH_NUM)) !== false)
{
$fields = $dbh->prepare("SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = ? AND TABLE_NAME = ?");
$fields->execute(array ($database, $table[0]));
$ors = array ();
while (($field = $fields->fetch(PDO::FETCH_NUM)) !== false)
{
$ors[] = str_replace("`", "``", $field[0]) . " LIKE REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(:search, '\\\\', '\\\\\\\\'), '%', '\\%'), '_', '\\_'), '*', '%'), '?', '_')";
}
$request = 'SELECT * FROM ';
$request .= str_replace("`", "``", $table[0]);
$request .= ' WHERE ';
$request .= implode(' OR ', $ors);
$rows = $dbh->prepare($request);
$rows->execute(array ('search' => $criteria));
$count = $rows->rowCount();
if ($count == 0)
{
continue;
}
$str = "Table '{$table[0]}' contains {$count} rows matching '{$criteria}'.";
echo str_repeat('-', strlen($str)), PHP_EOL;
echo $str, PHP_EOL;
echo str_repeat('-', strlen($str)), PHP_EOL;
$counter = 1;
while (($row = $rows->fetch(PDO::FETCH_ASSOC)) !== false)
{
$col = 0;
$title = "Row #{$counter}:";
echo $title;
foreach ($row as $column => $value)
{
echo
(($col++ > 0) ? str_repeat(' ', strlen($title) + 1) : ' '),
$column, ': ',
trim(preg_replace('!\s+!', ' ', str_replace(array ("\r", "\t", "\n"), array ("", "", " "), $value))),
PHP_EOL;
}
echo PHP_EOL;
$counter++;
}
}
运行这个脚本可以输出如下内容:
---------------------------------------------------
Table 'customers' contains 1 rows matching '*iemblo'.
---------------------------------------------------
Row #1: email_client: my@email.com
numero_client_compta: C05135
nom_client: Tiemblo
adresse_facturation_1: 151, My Street
adresse_facturation_2:
ville_facturation: Nantes
code_postal_facturation: 44300
pays_facturation: FR
numero_tva_client:
zone_geographique: UE
prenom_client: Alain
commentaires:
nom_societe:
email_facturation: my@email.com
HeidiSQL是一个实用可靠的工具，专为使用流行的MySQL服务器的web开发人员设计。
在HeidiSQL中，您可以按shift + ctrl + f，您可以在服务器上的所有表中找到文本。这个选项非常有用。
您可以查看information_schema模式。它包含所有表和表中所有字段的列表。然后，您可以使用从该表中获得的信息运行查询。
涉及的表包括SCHEMATA、tables和COLUMNS。有一些外键，这样您就可以在模式中准确地构建表的创建方式。
