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January 12th, 2004, 09:26 PM

weebeng

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alter table

hi..i'm using the oracle db. I have some sql query problems here.
i'd like to drop the ACPC_DTTMISS column here. I've try the sql but failed. Can someone give me the solution?

Quote:

SQL> desc ac_paramcontrol;
Name Null? Type
------------------------- --------------- -----------
ACPC_PARAMID NOT NULL VARCHAR2(2)
ACPC_ISSNO NOT NULL NUMBER(5)
ACPC_DTTMISS DATE
ACPC_RECCOUNT NUMBER(5)
ACPC_LOCKBY NUMBER(5)
ACPC_DTTMSEND DATE
ACPC_SENDBY NUMBER(5)

SQL> alter table ac_paramcontrol drop column acpc_dttmiss;
alter table ac_paramcontrol drop column acpc_dttmiss
*
ERROR at line 1:
ORA-00406: COMPATIBLE parameter needs to be 8.1.0.0.0 or greater

And, I also would like to remove the primary key of ACPC_ISSNO. How to do that?
Thank you!

January 12th, 2004, 10:21 PM

victorpendleton

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Change the Compatible parameter in init.ora to 8.1.0x
and restart the database
...

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Last edited by victorpendleton : January 13th, 2004 at 08:46 AM.

January 13th, 2004, 08:42 AM

shafique

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Dropping of primary key is very simple, if you know the constraint name of primary key then use the follwoing example:

ALTER TABLE dept
DROP CONSTRAINT pk_dept CASCADE
/

If you are not sure about constraint name then use the follwoing example:

ALTER TABLE dept
DROP PRIMARY KEY CASCADE
/

If column dropping functionality is not available in your installed version of oracle then you can drop it by simple method:

For example i want to drop the location column of DEPT table:

CREATE TABLE dept2
AS SELECT deptno,dname from dept
/
now drop the DEPT table:

DROP TABLE dept
/

create table DEPT again:

CREATE TABLE dept
AS SELECT * from dept2
/

January 29th, 2004, 04:36 AM

nimil

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Re: alter table

Quote:

Originally posted by weebeng
hi..i'm using the oracle db. I have some sql query problems here.
i'd like to drop the ACPC_DTTMISS column here. I've try the sql but failed. Can someone give me the solution?

And, I also would like to remove the primary key of ACPC_ISSNO. How to do that?
Thank you!

to drop a column from table use the command ' alter table [tablename] drop column [column_name']. this should work. all the best.

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