从mysql数据库的所有表中删除一条记录

Question

我不是mysql的专家。我有一个超过500个表的数据库，我想知道是否有方法搜索每个表中的某个记录，如果存在，则将其从表中删除。在此先感谢

Answer 1

与此类似的东西。根据您的需要进行更改。的[删除所有表中的数据在MYSQL]

  $tables = mysql_query('show tables', $conn); 
     foreach($acc_array as $acc) 
      foreach($tables as $v) { 
      $result1 = mysql_fetch_assoc(mysql_query("select account_num from $v where account_num = '$acc'" , $conn)); 
      if(!empty($result1)) 
      $result2 = mysql_query("delete from $v where account_num = '$acc'" , $conn); 
     } 

Answer 2

看看下面的存储过程，你可以创建：

CREATE PROCEDURE procDeleteAllTables() 

BEGIN 
     DECLARE table_name VARCHAR(255); 
     DECLARE end_of_tables INT DEFAULT 0; 

     DECLARE cur CURSOR FOR 
      SELECT t.table_name 
      FROM information_schema.tables t 
      WHERE t.table_schema = DATABASE() AND t.table_type='BASE TABLE'; 
     DECLARE CONTINUE HANDLER FOR NOT FOUND SET end_of_tables = 1; 

     SET FOREIGN_KEY_CHECKS = 0; 
     OPEN cur; 

     tables_loop: LOOP 
      FETCH cur INTO table_name; 

      IF end_of_tables = 1 THEN 
       LEAVE tables_loop; 
      END IF; 

      SET @s = CONCAT('DELETE FROM ' , table_name); 
      PREPARE stmt FROM @s; 
      EXECUTE stmt; 

     END LOOP; 

     CLOSE cur; 
     SET FOREIGN_KEY_CHECKS = 1; 
    END 

如果你需要插入特定的记录进行检查，你可以添加一个WHERE子句中这样说：

SET @s = CONCAT(CONCAT('DELETE FROM ' , table_name), ' WHERE somefield = 1'); 

Answer 3

$sql = "SHOW TABLES FROM dbname"; 
    $result = mysql_query($sql); 

    if (!$result) { 
     echo "DB Error, could not list tables\n"; 
     echo 'MySQL Error: ' . mysql_error(); 
     exit; 
    } 

    while ($row = mysql_fetch_row($result)) { 


     echo "Table: {$row[0]}\n"; 
     $tablename=$row[0]; 
     $sql="DELETE FROM $tablename WHERE name='ddddd'"; 
     echo "Table: {$sql}\n"; 
     $res=mysql_query($sql); 

    }