英文:
How to Change LONG to CLOB in Oracle
问题
如何在Oracle中将LONG数据类型更改为CLOB并使用函数？
ALTER TABLE "TABLE_NAME"
ADD "CLOB_NAME" CLOB;
UPDATE "TABLE_NAME"
SET "CLOB_NAME" = TO_CLOB("LONG_NAME");
ALTER TABLE "TABLE_NAME"
DROP COLUMN "LONG_NAME";
ALTER TABLE "TABLE_NAME"
RENAME COLUMN "CLOB_NAME" TO "LONG_NAME";
我不想使用这段代码，因为我无法更改表元素并且没有任何权限。
英文:
How can I Change LONG datatype to CLOB in Oracle with function?
ALTER TABLE "TABLE_NAME"
ADD "CLOB_NAME" CLOB;
UPDATE "TABLE_NAME"
SET "CLOB_NAME" = TO_CLOB("LONG_NAME");
ALTER TABLE "TABLE_NAME"
DROP CLOUMN "LONG_NAME";
ALTER TABLE "TABLE_NAME"
RENAME CLOUMN "CLOB_NAME" TO "LONG_NAME";
I don't wanna use that code because I can't change the table element and doesn't have any permission.
答案1
得分: 0
以下是您要翻译的内容：
一种选择是仅更改表格。
这是一个示例：
具有“long”数据类型列的表格：
SQL> create table test (col long);
表格已创建。
让我们填充它：
SQL> begin
2 for cur_r in (select text from all_views
3 where text_length < 30000
4 and text is not null
5 )
6 loop
7 insert into test (col) values (cur_r.text);
8 end loop;
9 end;
10 /
PL/SQL过程已成功完成。
它包含多少行？
SQL> select count(*) from test;
COUNT(*)
45
只是一个摘录：
SQL> select * from test where rownum = 1;
COL
SELECT q_name QUEUE, qt.msgid MSG_ID, corrid CORR_ID, priority MSG_PRIORITY,
好的，现在，修改表格，将“long”修改为“clob”：
SQL> alter table test modify col clob;
表格已更改。
结果：
SQL> select * from test where rownum = 1;
COL
SELECT q_name QUEUE, qt.msgid MSG_ID, corrid CORR_ID, priority MSG_PRIORITY,
SQL>;
英文:
One option is to just alter table.
Here's an example:
Table with long datatype column:
SQL> create table test (col long);
Table created.
Let's populate it:
SQL> begin
2 for cur_r in (select text from all_views
3 where text_length < 30000
4 and text is not null
5 )
6 loop
7 insert into test (col) values (cur_r.text);
8 end loop;
9 end;
10 /
PL/SQL procedure successfully completed.
How many rows does it contain?
SQL> select count(*) from test;
COUNT(*)
----------
45
Just an excerpt:
SQL> select * from test where rownum = 1;
COL
--------------------------------------------------------------------------------
SELECT q_name QUEUE, qt.msgid MSG_ID, corrid CORR_ID, priority MSG_PRIORITY,
OK; now, alter table and modify long to clob:
SQL> alter table test modify col clob;
Table altered.
Result:
SQL> select * from test where rownum = 1;
COL
--------------------------------------------------------------------------------
SELECT q_name QUEUE, qt.msgid MSG_ID, corrid CORR_ID, priority MSG_PRIORITY,
SQL>
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