Java中如何获得数据库支持的数字函数？
package org.nhooo.example.jdbc;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.DatabaseMetaData;
import java.sql.SQLException;
public class NumericFunction {
private static final String URL = "jdbc:mysql://localhost/nhooo";
private static final String USERNAME = "root";
private static final String PASSWORD = "";
public static void main(String[] args) {
try (Connection connection =
DriverManager.getConnection(URL, USERNAME, PASSWORD)) {
DatabaseMetaData meta = connection.getMetaData();
//获取数据库支持的数字函数
String[] functions = meta.getNumericFunctions().split(",\\s*");
for (String function : functions) {
System.out.println("Function = " + function);
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}这是MySQL数据库支持的数字函数。
Function = ABS Function = ACOS Function = ASIN Function = ATAN Function = ATAN2 Function = BIT_COUNT Function = CEILING Function = COS Function = COT Function = DEGREES Function = EXP Function = FLOOR Function = LOG Function = LOG10 Function = MAX Function = MIN Function = MOD Function = PI Function = POW Function = POWER Function = RADIANS Function = RAND Function = ROUND Function = SIN Function = SQRT Function = TAN Function = TRUNCATE
Maven依赖
<!-- https://search.maven.org/remotecontent?filepath=mysql/mysql-connector-java/8.0.17/mysql-connector-java-8.0.17.jar -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.17</version>
</dependency>