ERROR: No query specified

这个错误通常出现在您执行 SQL 查询时未指定具体的查询语句。在执行 SQL 查询时，您需要指定要查询的数据表、字段以及查询条件等信息。如果未指定查询语句，就会出现 "No query specified" 的错误。

如果您使用的是命令行或终端执行 SQL 查询，可以检查您输入的查询语句是否正确。如果使用的是其他工具或应用程序，可以查看相关文档或联系开发人员获取更多帮助。

相关问题

javax.servlet.ServletException: java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/testdb

This error occurs when the JDBC driver for MySQL is not found or not added to the classpath. To fix this error, follow these steps:

1. Download the JDBC driver for MySQL from the official website. The driver file should be in the form of a JAR file.

2. Add the JDBC driver JAR file to the classpath of your project. You can do this by adding the JAR file to the "lib" directory of your project or by adding it to the classpath through your IDE's project settings.

3. Make sure that the JDBC driver class name is correct in your code. The class name should be "com.mysql.jdbc.Driver".

4. Check the URL of the MySQL database connection. Make sure that it is correct and that the database is running on the specified port.

5. Test the database connection by running a simple query. If the query executes successfully, the connection should be working fine.

6. If the problem persists, try restarting your IDE or application server.

By following these steps, you should be able to fix the "No suitable driver found" error and establish a successful connection to your MySQL database.