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我试图让一个解释命令在mysql中工作.我正在尝试解决此删除查询的性能问题：DELETE FROM boost_cache_relationships WHERE base_dir = 'cache/normal/www.dane101.com'AND page_callback = 'node'AND page_type = 'story'AND page_id = '2891';此查询是SHOW FULL PROCESSLIST命令的输出. 我知道EXPLAIN不能用于删除,所以我复制它并用SELECT替换DELETE来提供以下内容：explain select FROM boost_cache_relationships WHERE base_dir...
为什么我尝试按查询执行订单,我总是收到错误,告诉我通过ORDER BY’order’DESC检查语法….这是我的查询：SELECT * FROM posts ORDER BY order DESC;我究竟做错了什么？？解决方法:order是SQL中的保留字;情况无关紧要.当用作identifier时必须引用它.从MySQL Reserved Words文档：Certain words such as SELECT, DELETE, or BIGINT [or ORDER] are reserved and require special treatment for use as identifiers such as table and...
参见英文答案 > How can I write SQL for a table that shares the same name as a protected keyword in MySql? 3个有人可以帮我弄清楚我在SELECT语句中做错了什么吗？SELECT * FROM group WHERE login = 'admin'我的错误是：right syntax to use near ‘group WHERE login = ‘admin” at line 1它应该失败但是因为admin不在数据库中但是当我插入数据库中的数据时它仍然失败.解决方法:GROUP...
我将使用C#中的OleDbDataAdapter在Access数据库中插入数据,但我在INSERT INTO命令中出现错误消息语法错误BackgroundWorker worker = new BackgroundWorker(); OleDbDataAdapter dbAdapter new OleDbDataAdapter(); OleDbConnection dbConnection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=E:\\PMS.mdb"); worker = new BackgroundWorker(); worker.WorkerReportsProgress = true; worker.DoWork += In...
为什么这不起作用？这是关于= =的命令串语法,但我似乎无法弄明白,在线示例似乎完全相同.编辑：已激活在列中. How to select data from database with many filter options?的例子private void btnDist_Click(object sender, EventArgs e) {string cmdText = "SELECT * FROM Inventory WHERE Rep <> '#NA' AND Activated In = '#NA'";SqlDataAdapter adapter = new SqlDataAdapter(cmdText, GetConnection());DataSet distDS = new ...
HTML代码<!DOCTYPE html> <html><head><style>#right{margin-top:109px;margin-right:225px;}#button{margin-right:;margin-top:22px;}</style></head><body><div id="total" style="width:1350px"><div id="top" style="width:1350px;height:69px;background-image:url('top.png');float:;"></div><div id="body" style="width:1350px;height:570px;background-image:url('body.jpg');float:;"><div id="right" style="background...
我正在执行跟随mysql查询并得到错误的语法错误.SELECT COUNT(*) FROM PS.INFO WHERE IPADDRESS='1.1.1.1' AND ID='YYY' AND (TYPE='PAID' 0R TYPE='FREE') AND EXPIRYTIME IS NULL;请帮我解决正确的语法？解决方法:你写了0R(零-R)而不是OR(O-R).
当我打开我的RSS应用程序时,我想检查我的数据库中是否存在一篇文章.如果它存在,我想删除它(或忽略它),如果不在数据库中写入它. 我一直试图这样做：Cursor cursor = ourDatabase.rawQuery("select 1 from "+ DBHelper.DATABASE_TABLE + " where " + DBHelper.TITLE + "='"+ title + "'" + " AND " + DBHelper.DATE + "='" + date + "'",new String[] {});if (cursor.moveToFirst()) {boolean exists = (cursor.getCount() > 0);curs...
我有问题,我希望Docker Compose在设置MySQL后直接导入我的Database.sql文件.但它总是抛出我的错误：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 ‘DELIMITER |’ at line 1但不知何故,当我通过浏览器中的phpMyAdmin导入它时,它的工作原理非常好. 这是我的docker-compose.yml：version: "3.2" services:php:build: './php/'networks:...
我正在Java应用程序中运行一些简单的MYSQL语句.我在语句上遇到语法错误,如果我通过Navicat直接对MYSQL服务器运行它,它似乎运行正常.给我带来麻烦的声明是： @NamedQuery(name =“Image.findDefaultByTest”,query =“SELECT i FROM Image i where(i.test_id =：test)LIMIT 0,1”) 我得到的错误是： 解析查询的语法错误[Image.findDefaultByTest：SELECT i FROM Image i where(i.test_id =：test)LIMIT 0,1],第1行,第48列：[LIMIT]处...