它抛出错误是因为BEGIN和END之间没有任何东西。在pl/sql块中，这就是魔术发生的地方。开始和END之间需要...
PL/SQL是一种过程化编程语言,用于Oracle数据库的开发和管理。PL/SQL块是一组PL/SQL语句的集合,可以作为一个单元执行。下面是将一个ID转换为多个ID的PL/SQL块语句的示例: `...
在PostgreSQL中,如果返回时没有数据,可以通过使用异常处理机制来引发异常。具体的方法是使用PL/pgSQL语言中的BEGIN...EXCEPTION...END语句块,结合使用RAISE语句来抛出异常。 以下是一个示例的PL/pgSQL代码,用于在PostgreSQL中引发异常: 代码语言:txt 复制
1、在你所有PL/SQL语句执行之前,加上SET SERVEROUTPUT ON;,这就将输出打开了。 2、在你的dbms(数据库管理系统)中的输出区域的上面一点点的菜单栏,找到’DBMS 输出’,点击‘启动DBMS输出‘即可。 我用的是sql developer,下面放上这个截图,其他dbms应该也是大同小异。 参考网址:https://stackoverflow.com/question...
When I have a BEGIN - END block in a PL/SQL, does it behave as an atomic transaction, that will try to commit on hitting the END block and if anything goes wrong rolls back the changes? If not, how do I make sure that the code inside the BEGIN - END block behaves like an atomi...
Is it possible to exit/skip from a begin end block if a condition is not met? Example: DECLARE my_var BOOLEAN := TRUE; BEGIN IF my_var THEN EXIT_BEGIN_END_HERE; -- Exits the block but continue execution after it! END IF; -- Other stuff happens here. Won't be executed if ...
PLS-00214: BEGIN...END block nesting is too deep Cause:The number of levels of nesting in the PL/SQL block is too large. Blocks can be nested up to 255 levels deep, depending on the availability of system resources such as memory. ...
CREATE OR REPLACE PROCEDURE handle_checkboxes ( checkboxes owa_util.ident_arr )ASBEGIN...FOR i IN 1..checkboxes.countLOOPhtp.print('Checkbox value: ' || checkboxes(i));END LOOP;...END;/show errors; Passing Entry Field Parameters from an HTML Form Entry...
Consider the following (incomplete) block of PL/pgSQL inside a function: CREATE OR REPLACE FUNCTION my_calc(myvar1 NUMERIC, myvar2 NUMERIC) RETURNS NUMERIC RETURNS NULL ON NULL INPUT IMMUTABLE LANGUAGE plpgsql AS $$ BEGIN RETURN some_third_party_function(myvar1, myvar2); EXCEPTION ...
SQL Functions Example: Calling the SQL COUNT Function in PL/SQL DECLARE job_count NUMBER; emp_count NUMBER; BEGIN SELECT COUNT(DISTINCT job_id) INTO job_count FROM employees; SELECT COUNT(*) INTO emp_count FROM employees; END; / SQL Pseudocolumns PL/SQL recognizes the SQL pseudo columns ...