mysql 1064错误原因及解决办法 1064错误意思是说我的SQL语法错误,然后显示错误的具体位置。 查看待更新的内容,以及执行跟新的php语句。 php语句如下: if(!$handle= @fopen($fname, r)) {echo open $fname failed\n;exit;}; $str=;$count=0;$ins=INSERT INT
mysql 1064错误原因及解决办法1064错误意思是说我的SQL语法错误,然后显示错误的具体位置。
查看待更新的内容,以及执行跟新的php语句。
php语句如下:
if(!$handle= @fopen($fname, "r")) {echo "open $fname failed\n";exit;}; $str="";$count=0; $ins="INSERT INTO pydot_g (id, aauthor) VALUES"; while(($buf=fgets($handle, 1000)) !== false){ list($id,$field) = explode("#",$buf); $str .= sprintf('(%d,'%s'),',$id,$field); $count++; } $str.="(3955,'3955')"; $dup="ON DUPLICATE KEY UPDATE aauthor=VALUES(aauthor);"; $sql=$ins.$str.$dup; //echo $sql."\n"; if(!mysql_query($sql)) {echo "mysql failed\n"; echo mysql_errno() . ": " . mysql_error() . "\n";} fclose($handle); mysql_close($link);
待跟新的内容如下:
1320#CarryDream Int'l Co., Ltd. 1321#ES APP Group 1322#app4uu从中可以发现待跟新的内容中还有单引号“‘”,使用的sql语句中打印的字段也含有单引号,两者产生了冲突。
所以解决的办法就是,将sql中的语句改为使用双引号““”,至此问题得以解决。

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MySQLclusteringenhancesdatabaserobustnessandscalabilitybydistributingdataacrossmultiplenodes.ItusestheNDBenginefordatareplicationandfaulttolerance,ensuringhighavailability.Setupinvolvesconfiguringmanagement,data,andSQLnodes,withcarefulmonitoringandpe

Optimizing database schema design in MySQL can improve performance through the following steps: 1. Index optimization: Create indexes on common query columns, balancing the overhead of query and inserting updates. 2. Table structure optimization: Reduce data redundancy through normalization or anti-normalization and improve access efficiency. 3. Data type selection: Use appropriate data types, such as INT instead of VARCHAR, to reduce storage space. 4. Partitioning and sub-table: For large data volumes, use partitioning and sub-table to disperse data to improve query and maintenance efficiency.

TooptimizeMySQLperformance,followthesesteps:1)Implementproperindexingtospeedupqueries,2)UseEXPLAINtoanalyzeandoptimizequeryperformance,3)Adjustserverconfigurationsettingslikeinnodb_buffer_pool_sizeandmax_connections,4)Usepartitioningforlargetablestoi


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