执行错误 在预期以下情况之一时遇到符号“IF”

Question

SQL查询执行过程中发生错误

Reason:
SQL Error [6550] [65000]: ORA-06550: line 11, column 1:
PLS-00103: Encountered the symbol "IF" when expecting one of the following:

   := . ( % ;
The symbol ";" was substituted for "IF" to continue.
ORA-06550: line 31, column 15:
PLS-00103: Encountered the symbol "(" when expecting one of the following:

   , from

------------代码从这里开始--------

DECLARE
    TOTALCOUNT int ;
BEGIN
    SELECT
    count(*) AS cnt
INTO
    TOTALCOUNT
FROM
    abc;

dbms_output.put_line (TOTALCOUNT) ;
END ;

DECLARE
    TOTALPTCOUNT int ;
BEGIN
    SELECT
    count(*) AS cnt
INTO
    TOTALPTCOUNT
FROM
    ghi g;

dbms_output.put_line (TOTALPTCOUNT) ;
END ;

DECLARE
    TOTALOVERALLCOUNT int ;
BEGIN   
    SELECT 
    ((TOTALPTCOUNT/TOTALCOUNT) * 100) AS dpc
INTO
    TOTALOVERALLCOUNT FROM dual ;
dbms_output.put_line (TOTALOVERALLCOUNT) 

IF:
    TOTALOVERALLCOUNT >= 10 THEN

"my logic here"

end 
if ;

Answer 1

前两个 PL/SQL 块没问题（就语法而言）。不过，请考虑用斜杠终止它们。

但是，第 3 块完全不正确：

• IF 不能将字符串括在双引号中（您可能应该将“我的逻辑”放在评论中并使用 NULL; 命令，只是为了使其编译
• 变量不应该有冒号（这里没有使用任何绑定）
• 要计算它的值，您不必SELECT FROM DUAL - 只需计算它
• 另外，END 不见了。

此外，由于第三个块使用前两个中声明的变量，所以它不起作用 - 它们在这里是未知的。您可能应该只有一个 DECLARE 部分，声明所有 3 个变量，将所有“逻辑”放入单个 PL/SQL 块中。像这样的：

DECLARE
   totalcount         INT;
   totalptcount       INT;
   totaloverallcount  INT;
BEGIN
   SELECT COUNT (*) INTO totalcount FROM abc;

   DBMS_OUTPUT.put_line (totalcount);

   SELECT COUNT (*)
     INTO totalptcount
     FROM ghi g;

   DBMS_OUTPUT.put_line (totalptcount);

   totaloverallcount := (totalptcount / totalcount) * 100;

   DBMS_OUTPUT.put_line (totaloverallcount);

   IF totaloverallcount >= 10                  --> your IF is completely wrong
   THEN
      NULL;
   -- "my logic here"
   END IF;
END;
/