12年过去了，还没有人发帖回答下面这个问题:

我想从MySQL数据库的所有表中搜索给定字符串的所有字段

答案包括gui、模糊的概念、语法错误、需要表名或前缀的过程以及各种扭曲。下面是一个实际的、有效的、经过测试的、简单易用的答案，它建立在多个先前的答案的基础上，同时还将主键添加到结果中。

DROP PROCEDURE IF EXISTS findAll;
DELIMITER $$
CREATE PROCEDURE findAll( IN `search` TEXT )
BEGIN
    SET SESSION group_concat_max_len := @@max_allowed_packet;
    SELECT GROUP_CONCAT(
        "SELECT '", c1.TABLE_NAME, "' AS `table`, '", c1.COLUMN_NAME, "' AS `column`, ",
        "CONCAT_WS(',', ",  (SELECT GROUP_CONCAT(c2.column_name) FROM `information_schema`.`columns` c2 WHERE c1.TABLE_SCHEMA=c2.TABLE_SCHEMA AND c1.TABLE_NAME=c2.TABLE_NAME AND c2.COLUMN_KEY='PRI') ,") AS pri,", 
        c1.COLUMN_NAME, " AS value FROM ", c1.TABLE_NAME,
      " WHERE `",c1.COLUMN_NAME,"` LIKE '%", search, "%'" SEPARATOR "\nUNION\n") AS col 
    INTO @sql   
    FROM information_schema.columns c1 
    WHERE c1.TABLE_SCHEMA = DATABASE();
  PREPARE stmt FROM @sql;
  EXECUTE stmt;
  DEALLOCATE PREPARE stmt;
END $$
DELIMITER ;

就是这样。你现在可以调用findAll('foobar');

不除外。你会遇到两个问题:

MySQL错误1436:线程堆栈溢出 准备好的语句需要重新准备。

将以下两行添加到/etc/mysql/mysql.conf.d/mysqld.cnf或任何你的cnf所在的地方，或者将它们保存在一个单独的文件中并复制到conf.d目录。

thread_stack            = 2M
table_definition_cache  = 5000

是的，显然这不应该在生产环境中运行，因为它不安全，而且会降低您的性能。

您可以对数据库(及其数据)执行SQLDump，然后搜索该文件。

这个解决方案 a)只有MySQL，不需要其他语言，并且 b)返回SQL结果，准备处理!

#Search multiple database tables and/or columns
#Version 0.1 - JK 2014-01
#USAGE: 1. set the search term @search, 2. set the scope by adapting the WHERE clause of the `information_schema`.`columns` query
#NOTE: This is a usage example and might be advanced by setting the scope through a variable, putting it all in a function, and so on...

#define the search term here (using rules for the LIKE command, e.g % as a wildcard)
SET @search = '%needle%';

#settings
SET SESSION group_concat_max_len := @@max_allowed_packet;

#ini variable
SET @sql = NULL;

#query for prepared statement
SELECT
    GROUP_CONCAT("SELECT '",`TABLE_NAME`,"' AS `table`, '",`COLUMN_NAME`,"' AS `column`, `",`COLUMN_NAME`,"` AS `value` FROM `",TABLE_NAME,"` WHERE `",COLUMN_NAME,"` LIKE '",@search,"'" SEPARATOR "\nUNION\n") AS col
INTO @sql
FROM `information_schema`.`columns`
WHERE TABLE_NAME IN
(
    SELECT TABLE_NAME FROM `information_schema`.`columns`
    WHERE
        TABLE_SCHEMA IN ("my_database")
        && TABLE_NAME IN ("my_table1", "my_table2") || TABLE_NAME LIKE "my_prefix_%"
);

#prepare and execute the statement
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

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。

我要用这个。你只需要改变变量

$query ="SELECT `column_name` FROM `information_schema`.`columns` WHERE `table_schema`='" . $_SESSION['db'] . "' AND `table_name`='" . $table . "' ";
$stmt = $dbh->prepare($query);
$stmt->execute(); 
$columns = $stmt->fetchAll(PDO::FETCH_ASSOC);       

$query="SELECT name FROM `" . $database . "`.`" . $table . "` WHERE ( ";
foreach ( $columns as $column ) {
    $query .=" CONVERT( `" . $column['column_name'] . "` USING utf8 ) LIKE '%" . $search . "%' OR ";
}
$query = substr($query, 0, -3);
$query .= ")";

echo $query . "<br>";
$stmt=$dbh->prepare($query);
$stmt->execute();
$results = $stmt->fetchAll(PDO::FETCH_ASSOC);
echo "<pre>";
print_r ($results );
echo "</pre>";

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。