相关疑难解决方法(0)

story_category我的数据库中有一个表有损坏的条目.下一个查询返回损坏的条目:

SELECT * 
FROM  story_category 
WHERE category_id NOT IN (
    SELECT DISTINCT category.id 
    FROM category INNER JOIN 
       story_category ON category_id=category.id);

我试图删除它们执行:

DELETE FROM story_category 
WHERE category_id NOT IN (
    SELECT DISTINCT category.id 
    FROM category 
      INNER JOIN story_category ON category_id=category.id);

但我得到了下一个错误:

#1093 - 您无法在FROM子句中为更新指定目标表'story_category'

我怎么能克服这个？

我有一个简单的mysql表:

CREATE TABLE IF NOT EXISTS `pers` (
  `persID` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(35) NOT NULL,
  `gehalt` int(11) NOT NULL,
  `chefID` int(11) DEFAULT NULL,
  PRIMARY KEY (`persID`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=4 ;

INSERT INTO `pers` (`persID`, `name`, `gehalt`, `chefID`) VALUES
(1, 'blb', 1000, 3),
(2, 'as', 1000, 3),
(3, 'chef', 1040, NULL);

我试图运行以下更新,但我只得到错误1093:

UPDATE pers P 
SET P.gehalt = P.gehalt * 1.05 
WHERE (P.chefID IS NOT NULL 
OR gehalt < 
(SELECT (
    SELECT MAX(gehalt * 1.05) 
    FROM pers …