The NVL function in SQL replaces NULL values with a default. Learn how to use it, understand the syntax, and see how it compares to COALESCE for SQL queries.
创建带出入参存储过程代码 --带出入参存储过程 CREATE OR REPLACE PROCEDURE stu_proc(v_id IN NUMBER, v_name OUT VARCHAR2) AS BEGIN SELECT o.sname INTO v_name FROM student o where o.id=v_id; END; 使用JAVA调用带出入参存储过程 packagecom.ljq.test;importjava.sql.CallableStatement;importjava....
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