错误解决SQLException: [Microsoft][SQLServer 2000 Driver for
msbase.tar mssqlserver.jar msutil.jar 放在LIB目录下 代码如下： Class.forName(com.microsoft.jdbc.sqlserver.SQLServerDriver).newInstance(); Connection con=java.sql.DriverManager.getConnection(jdbc:microsoft:sqlserver://127.0.0.1:1433;Databas
msbase.tar mssqlserver.jar msutil.jar 放在LIB目录下
代码如下： Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance(); Connection con=java.sql.DriverManager.getConnection("jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=dblink","sa",""); Statement stmt=con.createStatement(); ResultSet rst=stmt.executeQuery("select * from FYSH;");
出现错误：严重: Servlet.service() for servlet jsp threw exceptionjava.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]Connection refused: connect at com.microsoft.jdbc.base.BaseExceptions.createException(Unknown Source) at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source) at com.microsoft.jdbc.sqlserver.tds.TDSConnection.
后来网上查到 安装SQLSERVER SP4 就可以了 我安装了 发现还是不能用 晕结果 看了一下 安装的SP4 只是解压缩C:/SQL2KSP4 SQL2000.MSDE-KB884525-SP4-x86-CHS.EXE 一个低级错误 以后引以为戒
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When would you choose InnoDB over MyISAM, and vice versa?Apr 25, 2025 am 12:22 AMThe situations when choosing InnoDB instead of MyISAM include: 1) transaction support, 2) high concurrency environment, 3) high data consistency; conversely, the situation when choosing MyISAM includes: 1) mainly read operations, 2) no transaction support is required. InnoDB is suitable for applications that require high data consistency and transaction processing, such as e-commerce platforms, while MyISAM is suitable for read-intensive and transaction-free applications such as blog systems.
Explain the purpose of foreign keys in MySQL.Apr 25, 2025 am 12:17 AMIn MySQL, the function of foreign keys is to establish the relationship between tables and ensure the consistency and integrity of the data. Foreign keys maintain the effectiveness of data through reference integrity checks and cascading operations. Pay attention to performance optimization and avoid common errors when using them.
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