Select 在 plsql for 循环中使用内连接查询失败

Question

这是我的 plsql 块

BEGIN
  FOR c IN ( SELECT T.table_name FROM user_tables T INNER JOIN (SELECT distinct to_char(SYSTEM_DATE,'yyyymmdd') as sys_date FROM *) ON T.table_name LIKE '%' || sys_date || '%' )
  LOOP
    EXECUTE IMMEDIATE 'DROP TABLE ' || c.table_name || ' CASCADE';
  END LOOP;
END;

出现缺少关键字错误

Error report:
ORA-00905: missing keyword
ORA-06512: at line 4
00905. 00000 -  "missing keyword"
*Cause:    
*Action:

你能告诉我代码中有什么问题吗？

Answer 1

如果你看看 Standard DOCS

你会明白你需要将 DROP 语句写成 -

DROP TABLE TABLE_NAME CASCADE CONSTRAINTS;

您的 SQL 缺少 CONSTRAINTS 关键字

Answer 2

DROP TABLE ' || c.table_name || ' CASCADE 是 PostgreSQL

中的工作语句

DROP TABLE name [, ...] [ CASCADE | RESTRICT ]

但不在 Oracle 中，它不需要 CASCADE 或 CASCADE CONSTRAINTS 子句：

Specify CASCADE CONSTRAINTS to drop all referential integrity constraints that refer to primary and unique keys in the dropped table. If you omit this clause, and such referential integrity constraints exist, then the database returns an error and does not drop the table.

Select 在 plsql for 循环中使用内连接查询失败

Select query using inner join in plsql for loop fails

oracle

plsql

cascade