Question

如何在删除和创建表的过程中放置多个“开始”？

我的尝试 -

CREATE PROCEDURE procCreateCarTable
IS
    BEGIN

        BEGIN 
            EXECUTE IMMEDIATE 'DROP TABLE CARS';
        END;

        COMMIT;

        BEGIN
            EXECUTE IMMEDIATE 'CREATE TABLE CARS (ID VARCHAR2(1), NAME VARCHAR2(10), TITLE VARCHAR2(10))';
            COMMIT;
        END;
    END;

逐个执行工作，但在创建此过程时，我收到以下错误 -

ORA-06550: line 5, column 1:
PLS-00103: Encountered the symbol "END" 
06550. 00000 -  "line %s, column %s:\n%s"
*Cause:    Usually a PL/SQL compilation error.
*Action:

以下是我在下面的评论中提到的SQL程序 -

CREATE PROCEDURE procCreateCarTable
IS
BEGIN
  EXECUTE IMMEDIATE 'DROP TABLE CARS';
  EXCEPTION WHEN OTHERS THEN NULL;
  EXECUTE IMMEDIATE 'CREATE TABLE CARS (ID VARCHAR2(1), NAME VARCHAR2(10), TITLE  
  VARCHAR2(10))';
  COMMIT;  
END;

我在案例表中添加了一个EXCEPTION CARS不存在，但现在我的最新程序失败了 -

CREATE PROCEDURE procCreateCarTable
IS
BEGIN
  EXECUTE IMMEDIATE 'DROP TABLE CARS';
  EXCEPTION WHEN OTHERS THEN NULL;
  EXECUTE IMMEDIATE 'CREATE TABLE CARS (ID VARCHAR2(1), NAME VARCHAR2(10), TITLE      
  VARCHAR2(10))';
  EXECUTE IMMEDIATE 'DROP TABLE TRUCKS';
  EXCEPTION WHEN OTHERS THEN NULL;
  EXECUTE IMMEDIATE 'CREATE TABLE TRUCKS (ID VARCHAR2(1), NAME VARCHAR2(10), TITLE   
  VARCHAR2(10))';
  COMMIT;
END;

我能想到为什么我的最新程序失败的唯一原因是因为另一个'EXCEPTION'。我确实想要另一个，所以程序仍然可以创建TRUCKS表。有什么建议吗？

Answer 1

通过反复试验，我终于创建了程序 -

CREATE PROCEDURE procCreateCarTable
IS
BEGIN
  BEGIN
    EXECUTE IMMEDIATE 'DROP TABLE CARS';
    EXCEPTION WHEN OTHERS THEN NULL;
    EXECUTE IMMEDIATE 'CREATE TABLE CARS (ID VARCHAR2(1), NAME VARCHAR2(10), TITLE    
    VARCHAR2(10))';
END;
BEGIN
    EXECUTE IMMEDIATE 'DROP TABLE TRUCKS';
    EXCEPTION WHEN OTHERS THEN NULL;
    EXECUTE IMMEDIATE 'CREATE TABLE TRUCKS (ID VARCHAR2(1), NAME VARCHAR2(10), TITLE 
    VARCHAR2(10))';
END;
END;

使用多个嵌套开始创建存储过程

1 个答案: