严重: Servlet.service() for servlet [jsp] in context with path [/management] threw exception [javax.servlet.ServletException: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'CLAMP' in 'where clause'] with root cause
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'CLAMP' in 'where clause'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.Util.getInstance(Util.java:381)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1031)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3376)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3308)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1837)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1961)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2537)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2466)
at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1383)
at org.apache.jsp._30010_005fpart_jsp._jspService(_30010_005fpart_jsp.java:300)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:431)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at management.EncodingFilter.doFilter(EncodingFilter.java:21)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:516)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1086)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:659)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:285)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2439)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2428)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:744)

原因：原来写的带非数字的字符串查找没有加单引号

原写法：sql="select * from material_info where m_author="+search_key;

改正后：sql="select * from material_info where m_author='"+search_key+"'";

Sql语句出错：Unknown column 'CLAMP' in 'where clause'的更多相关文章

  1. mysql—mysql查询语句提示Unknown column ‘xxx’ in ‘where clause’

    运行结果中提示Unknown column 'xxx' in 'where clause'的问题.经过大神的指导,顿时明白其中缘由,如果sql中定义的类型是int型的可以不用加引号,但是如果是字符串类 ...

  2. 数据库查询语句遇到:Unknown column 'XXXX' in 'where clause'解决方法

    数据库查询语句遇到:Unknown colunm 'XXX' in 'where clause'解决方法 根本原因:可能是sql语句所用到的数据类型错误(int与String)弄错- 我的情况: 在网 ...

  3. sql语句出错：Column count doesn't match value count at row 1

    报错内容: java.sql.SQLException: Column count doesn't match value count at row 1 at com.mysql.jdbc.SQLEr ...

  4. 查询避免Unknown column ‘xxx’ in ‘where clause’

    但凡写过sql语句的人估计都曾经碰到过类似于Unknown column ‘xxx’ in ‘where clause’的问题. 单从字面理解,我们很容易得出列名不存在的结论,但是,很多时候起始并不是 ...

  5. 查询避免Unknown column ‘xxx’ in ‘where clause

    问题: 单从字面理解,我们很容易得出列名称不存在的结论, 但是,很多时候并不是列名出错造成的,而是由于拼凑sql语句时对字符类型数据没有用引号引起来造成的. 例子: 例如:  String sql=& ...

  6. com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'dd' in 'where clause'

    今天在使用mysql数据库查找数据的时候报错,错误信息如下: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown co ...

  7. jmeter------reponse报错”Unknown column 'XXXXX' in 'where clause'“

    一.问题描述 jmeter添加了与数据库mysql的连接,编写完JDBC Request之后,运行提示报错”Unknown column 'be7f5b6e750bb6becf855386338644 ...

  8. mysql出现 Unknown column 'bname' in 'where clause'和Unknown column 'bid' in 'field list'

    在用mysql数据库建表和修改数据库数据时,出现  Unknown column 'bname' in 'where clause'和Unknown column 'bid' in 'field li ...

  9. JFinal项目eclipse出现Unknown column 'createtime' in 'order clause' 的错误

    JFinal项目eclipse出现Unknown column 'createtime' in 'order clause' 的错误,在本次项目中的原因是我的表中的字段信息中创建时间的字段是creat ...

随机推荐

  1. Linux磁盘空间分析及清理（df、du、rm）

    1.df磁盘空间查看 df可以查看一级文件夹大小.使用比例.档案系统及其挂入点. [root@oms ~]# df -Th Filesystem Type Size Used Avail Use% M ...

  2. vba统计电脑计算机名和登陆的用户名

    Public Sub GetIPT() gipt = Trim(InputBox("请输入所在组,只需输入前面的字母代码即可 A- groupA B-groupB C-groupC D-gr ...

  3. 【APP测试（Android）】－－安全测试

  4. More x64 assembler fun-facts–new assembler directives（转载）

    原文地址 The Windows x64 ABI (Application Binary Interface) presents some new challenges for assembly pr ...

  5. 《Linux就该这么学》第四天课程

     秦时明月经典语录: 侠道:五步之内,百人不当.十年磨剑,一孤侠道——荆轲 我发了一些课堂笔记,供你们参考 原创地址:https://www.linuxprobe.com/chapter-03.htm ...

  6. diango中的url路由系统

    一.url配置 url本质是url与要为该url调用的视图函数之间的映射表 urlpatterns = [正则,视图函数[,别名]] 二.正则表达式 1.匹配原则 django是循环urlpatter ...

  7. jxl操作excel写入数据不覆盖原有数据示例

    public void readTO() {        Workbook wb = null;        WritableWorkbook wwb = null;        try {   ...

  8. rapidjson常见使用示例

    目录 目录 1 1. 前言 2 2. Move语意 2 3. rapidjson::Document 2 4. 成员迭代器MemberIterator 3 5. 数组迭代器ValueIterator ...

  9. Jquery 图片走马灯效果原理

    本篇只讲解水平走马灯效果,垂直向上走马灯效果不讲解,原理一样,但是水平走马灯效果有一个小坑.待会讲解 照例先上代码: HTML: <div class="box"> & ...

  10. Request模块—数据解析工具

    一.爬虫基本步骤 指定URL信息 发起请求 获取响应数据 对响应数据进行数据解析 持久化存储 二.数据解析 1. 正则表达式 (1) 基本语法 1. 单字符: . : 除换行以外所有字符 [] :[a ...