我想通过向其添加SYSDATE
来更改表名。例如,我想将表格EXAMPLE_TABLE
更改为EXAMPLE_TABLE_05_01_2015
,但我希望从SYSDATE
获取日期。
我准备了以下内容,但它无法正常工作:
ALTER TABLE "MYDB"."EXAMPLE_TABLE" rename to (SELECT 'EXAMPLE_TABLE' || TO_CHAR(SYSDATE, '_dd_MM_yyyy') FROM DUAL);
我怎样才能让它发挥作用?
这是错误:
SQL Error: ORA-14047: ALTER TABLE|INDEX RENAME may not be combined with other operations
14047. 00000 - "ALTER TABLE|INDEX RENAME may not be combined with other operations"
*Cause: ALTER TABLE or ALTER INDEX statement attempted to combine
a RENAME operation with some other operation which is illegal
*Action: Ensure that RENAME operation is the sole operation specified in
ALTER TABLE or ALTER INDEX statement;
答案 0 :(得分:6)
使用execute immediate
。
begin
execute immediate
'alter table mydb.example_table rename to ' ||
'example_table_' || to_char(sysdate, 'dd_mm_yyyy');
end;
/
那就是说,我预感到你最好不要使用分区表。
答案 1 :(得分:0)
在 SQL*Plus
中,您可以使用variable substitution
。
另一种方式:
SQL> CREATE TABLE t(ID NUMBER)
2 /
Table created.
SQL>
SQL> COLUMN new_tablename NEW_VALUE new_tablename
SQL> SELECT 't_' || to_char(sysdate, 'dd_mm_yyyy') AS new_tablename from dual
2 /
NEW_TABLENAM
------------
t_05_01_2015
SQL>
SQL> RENAME t TO &new_tablename
2 /
old 1: RENAME t TO &new_tablename
new 1: RENAME t TO t_05_01_2015
Table renamed.
SQL>
SQL> select * from t_05_01_2015;
no rows selected
SQL>
因此,现在表格T
被重命名为到T_05_01_2015
。