zoukankan      html  css  js  c++  java
  • 深夜一次数据库执行SQL思考(怎么看执行报错信息)

    如下sql在执行时

    DROP TABLE IF EXISTS `book`;
    CREATE TABLE `book`  (
      `id` int(11) NOT NULL AUTO_INCREMENT,
      `name` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
      `cid` int(10) DEFAULT NULL,
      `bookType` int(1) DEFAULT NULL,
      `price` double(10, 2) DEFAULT NULL,
      `originalPrice` double(10, 2) DEFAULT NULL,
      `uid` int(11) DEFAULT NULL,
      `author` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
      `press` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
      `version` varchar(5) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
      `degree` double(2, 1) DEFAULT NULL,
      `publishDate` varchar(7) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
      `description` text CHARACTER SET utf8 COLLATE utf8_general_ci,
      `date` datetime(0) DEFAULT NULL,
      PRIMARY KEY (`id`) USING BTREE,
      INDEX `fk_book_category`(`cid`) USING BTREE,
      INDEX `fk_book_user`(`uid`) USING BTREE,
      CONSTRAINT `fk_book_category` FOREIGN KEY (`cid`) REFERENCES `category` (`id`) ON DELETE SET NULL ON UPDATE CASCADE,
      CONSTRAINT `fk_book_user` FOREIGN KEY (`uid`) REFERENCES `user` (`id`) ON DELETE SET NULL ON UPDATE CASCADE
    ) ENGINE = InnoDB AUTO_INCREMENT = 90 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
    

     

    会报出该异常:

    CREATE TABLE `book`  (
      `id` int(11) NOT NULL AUTO_INCREMENT,
      `name` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
      `cid` int(10) DEFAULT NULL,
      `bookType` int(1) DEFAULT NULL,
      `price` double(10, 2) DEFAULT NULL,
      `originalPrice` double(10, 2) DEFAULT NULL,
      `uid` int(11) DEFAULT NULL,
      `author` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
      `press` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
      `version` varchar(5) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
      `degree` double(2, 1) DEFAULT NULL,
      `publishDate` varchar(7) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
      `description` text CHARACTER SET utf8 COLLATE utf8_general_ci,
      `date` datetime(0) DEFAULT NULL,
      PRIMARY KEY (`id`) USING BTREE,
      INDEX `fk_book_category`(`cid`) USING BTREE,
      INDEX `fk_book_user`(`uid`) USING BTREE,
      CONSTRAINT `fk_book_category` FOREIGN KEY (`cid`) REFERENCES `category` (`id`) ON DELETE SET NULL ON UPDATE CASCADE,
      CONSTRAINT `fk_book_user` FOREIGN KEY (`uid`) REFERENCES `user` (`id`) ON DELETE SET NULL ON UPDATE CASCADE
    ) ENGINE = InnoDB AUTO_INCREMENT = 90 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic
    > 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(0) DEFAULT NULL,
        PRIMARY KEY (`id`) USING BTREE,
        INDEX `fk_book_category`' at line 15
    > 时间: 0s
    

      

    关键在于该句提示:

    (0) DEFAULT NULL,
    PRIMARY KEY (`id`) USING BTREE,
    INDEX `fk_book_category`

    当出现报错信息时,一定要在报错提示起始位置查找,比如上面这个提示,起始就是datetime不能设置大小。提示中很明确的已经指出是在哪个位置出错的。

    因此报错时,一定要检查的第一个词的位置,要么写错了,要么不合法。比如 (0) 这个就是不能加的。

  • 相关阅读:
    判断 iframe 是否加载完毕
    iframe跨端口报错 Blocked a frame with origin from accessing a cross-origin frame
    React与Vue
    原生js监听input值发生变化
    防抖函数与节流函数
    原生js 实现better-scroll效果,饿了么菜单内容联动,即粘即用
    力扣数据库的一些题解
    动态代理
    一个能够进行增删改查的数组的构建(数据结构01)
    c语言学习笔记(1)
  • 原文地址:https://www.cnblogs.com/hfultrastrong/p/9874126.html
Copyright © 2011-2022 走看看