如何在 oracle pl/sql 语句中声明查询？

Question

我是 Oracle 的新手，但我受命编写此声明。

BEGIN
FOR partition IN 1..32 LOOP
    lQuery := 'UPDATE CORE.tbl PARTITION(tbl' || LPAD(partition, 2, '0') || ') SET p = NULL '
           || 'WHERE p IS NOT NULL';

    EXECUTE IMMEDIATE lQuery;
END LOOP;
END;

但是，我得到以下错误

Error starting at line 1 in command:
BEGIN
FOR partition IN 1..32 LOOP
    lQuery := 'UPDATE CORE.user_login PARTITION(user_login' || LPAD(partition, 2, '0') || ') SET password_md5 = NULL '
           || 'WHERE password_md5 IS NOT NULL';

    EXECUTE IMMEDIATE lQuery;
END LOOP;
END;
Error report:
ORA-06550: line 3, column 5:
PLS-00201: identifier 'LQUERY' must be declared
ORA-06550: line 3, column 5:
PL/SQL: Statement ignored
ORA-06550: line 6, column 23:
PLS-00201: identifier 'LQUERY' must be declared
ORA-06550: line 6, column 5:
PL/SQL: Statement ignored
06550. 00000 -  "line %s, column %s:\n%s"
*Cause:    Usually a PL/SQL compilation error.
*Action:

当我尝试运行时。我知道这可能是因为没有声明 lQuery 但在线谷歌搜索向我展示了声明某种类型变量的示例，例如（整数、varchar.. 等），但其中 none 显示了如何如该语句所期望的那样声明一个查询。

Answer 1

您的语句可以简单地声明为 varchar2。例如：

declare
  vsql varchar2(1000);
  n   integer;
begin
  vsql := 'select 1 from dual';
  execute immediate vsql into n;
  dbms_output.put_line(n);
end;

如何在 oracle pl/sql 语句中声明查询？

How do I declare a query in an oracle pl/sql statement?

oracle

plsql

oracle-sqldeveloper