[英]how to drop a table that belong to a schema user in sys using substitution Oracle sql
I tried to drop a table tableA owned by schema tom in sys.我试图删除 sys 中模式 tom 拥有的表 tableA。
I was able to achieve that with the statement我能够通过声明实现这一目标
drop table tom.tableA
Not sure how to use substitution.不确定如何使用替换。 Not working with the following statements.
不适用于以下语句。
define schema='tom'
drop table &schema.tableA
From the "Using Substitution Variables" documentation :来自“使用替代变量”文档:
If you want to append a period immediately after a substitution variable name, then use two periods together.
如果要 append 紧跟在替换变量名之后的一个句点,则将两个句点一起使用。 For example, if "myfile" is defined as "reports" then the command:
例如,如果“myfile”被定义为“reports”,那么命令:
SQL> spool &myfile..log
is the same as:
是相同的:
SQL> spool reports.log
In your case, you need two periods and also to remove the string literal quotes around the schema name:在您的情况下,您需要两个句点,还需要删除架构名称周围的字符串文字引号:
DEFINE schema=tom
DROP TABLE &schema..tableA
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