SQL & PL/SQL :: Modification Of Existing Check Constraint
May 9, 2012
How can I modify the check constraint without dropping the already existing check constraint.
Example: alter table table_1 add constraint const_chk check (ATTRIBUTE7 in
('READ','UNREAD');
Want to add some TENTATIVE value for the already existing one. I could do that by dropping the constraint
ALTER TABLE table_1 DROP CONSTRAINT const_chk and modifying it later as
alter table table_1 add constraint const_chk check (ATTRIBUTE7 in
('READ','UNREAD','TENTATIVE');
Is it possible to do that with out dropping the constraint?
Can we modifying the existing constraint on table?I have table level UNIQUE constraint on 3 columns of table.I need to modify the UNIQUE constraint to 2 columns? Instead of dropping/recreating the constraint, is there any option to modify the existing constraint
Ex
CREATE TABLE TEST_CONST(NUM1 NUMBER , NUM2 NUMBER , NUM3 NUMBER , UNIQUE (NUM1 ,NUM2,NUM3)); ;
SELECT * FROM USER_CONS_COLUMNS UCC WHERE UCC.TABLE_NAME LIKE 'TEST_CONST';
ALTER TABLE TEST_CONST MODIFY CONSTRAINT SYS_C0025132 UNIQUE(NUM1,NUM2);
CREATE TABLE RMD_2 ( "RMD_ID" NUMBER(10,0) NOT NULL ENABLE, "ABB" VARCHAR2(16 BYTE), "ACT_IND" VARCHAR2(1 BYTE) NOT NULL DISABLE, CONSTRAINT "RMD_2_C1" CHECK (act_ind IN ('Y', 'N')) ENABLE )
for column ACT_IND their is a check constraint RMD_2_C1 it should only accept either Y or N.
but, when ever i am inserting other values other than Y or N it is accepting it should not accept and it should have to give error message ORA-02293- : check constraint violated.
but it is not happening,it is accepting all other values even NULL value also.my requirement is this column should only accept either Y or N and it should not accept other values.
I need to alter a table to check that the data in a column is contained in a similar column in another table.
I have a STORES table and a STORE_REP table. Both tables have a column REP_ID.
I need to add a CHECK constraint into the STORES table to make sure that the info entered into its REP_ID column matches an entry in the STORE_REP table.
Both have a NUMBER(5) data type.
Will it make any difference if the REP_ID column in the STORE_REP table was originally created with a VARCHAR2(5) data type and was later converted to NUMBER(5), while the REP_ID column in the STORES table was created as NUMBER(5) when that table was created?
In the below code, do I need the 'NOT NULL' after the 'state char(2)'? I am guessing that I do not need it since I have the CHECK constraint on the column.
CREATE TABLE employee( id PRIMARY KEY, first varchar(20) NOT NULL, middle varchar(20), [code]....
I have table customer which contains a column CUSTOMER_FIRST_NAME
CUSTOMER_FIRST_NAME VARCHAR2(50)
What will be sql statement to add a constraint on the CUSTOMER_FIRST_NAME column of the CUSTOMERS table so that the value inserted in the column does not have numbers ?
ID, DECRIPTION and HOX, are nullable columns.When inserted ID on table, description will automatically updated by the trigger as 'NOT VALID', now I need modification on the trigger that if the IDchanges from 1000, (the HOX-value stays at it was) to some other value like 1001 description willupdated to 'VALID'. But if the ID is not 1000, like 999,description will stay as NOT VALID.
I have 2 questions, because they can be inter-related I am posting it in a single post. These queries are related to Oracle(PLSQL).
1. I am trying to increase the size of a field in a table which has almost 2 million records and the query for alteration runs for almost and hour and rollsback, wondering is there a better way of doing it.
2. I have modified the size of a field in a table from Varchar2(10) to Varchar2(20), now when I tried to rollback the modification it is not letting me to change the size from Varchar2(20) to Varchar2(10). No data has been inserted after the modification.
Need to change the precision of a column in a existing table. Statistics about the table
* has over 130 columns * More than 300 million records * Column to modify is #121 which has data * No primary key defined
Since the column has data, it is not possible to modify with a simple Alter.
Second option - create temp column in same table, update from original, put null in original, alter, update back from temp, drop the temp column. This approach is very expensive and time consuming.
I want to replicate single table data/modification from source db to destination DB.procedure or steps how to create replication between source and dest db for single table.
i want to get table name, constraint name, constraint type with join processes in string type. this is what i want: alter table tablename add constraint constraintname constrainttype(columnname)
I'm am getting an error that says that a role doesn't exist when I can cleary see it in DBA_ROLES. I can successfully grant other roles in this session. I am using Oracle 11.1 on RAC.
GRANT "CONNECT" TO BAKERD Error at line 1 ORA-01919: role 'CONNECT' does not exist select * from dba_roles where role = 'CONNECT'
i have a problem that i have created a table named PROJECT and structure is like- CREATE TABLE PROJECT ( id VARCHAR2(250 BYTE) NOT NULL, NAME VARCHAR2(250 BYTE) NOT NULL, COMPID NUMBER NOT NULL,
[code]...
and this table is created in some number of different database then i want to delete the not null constraint of "id" column and there is 3 not null constraint in my table and i didnot gave name at the time of creation, so we cant delete it by its name in the script because there will be different name in another database for the same constraint. i want to make a script to delete the not null constraint because it is the part of my script.
how should i get proper information for deleting the constraint. and i used "user_constraints" but it shows same information for the all three "not null" constraint.
Create table students ( Sid number(3), Sname varchar(20) not null, Email varchar(20) not null, Doj Timestamp default sysdate not null, Dob date not null,
[code]....
when i run the above code i m getting error like this...I dont understand wat error it is...Because i didnt reference any column in the check constraint...Thn why it says that i m referencing some column..
Error: SQL> SQL> Create table students 2 ( 3 Sid number(3), 4 Sname varchar(20) not null,
I have a parent table called dept and one child table emp which is referenced on deptno and now both have data . Now i want to truncate the dept table and i have truncated emp table after it when i am trying to truncate dept table then oracle throws a error that is-
"ORA-02266: unique/primary keys in table referenced by enabled foreign keys" ,
but when i tried to delete some records 1 by 1 then these have delete but truncate is not still working. why? if i have 10 millon records.
Can I apply Referential Integrity to only selected rows of a particular column? This is the reference key to the primary key to another table. But, the issue is, this reference column is not having mandatory data for all the rows. So, whenever this is null, I dont want it to be referred by parent table.
I want to know constraint name of a particular table if it exists.Here are the queries that i tried to find the constraint name of a particular table but the results were 'no rows selected'.
Queries:
select constraint_name from user_cons_columns where table_name='x'; select constraint_name from user_constraints where table_name='x';
A {op_id, op_name, .} B {b_id, op_id, supplier_id, .} C {c_id, op_id, op_id2, supplier_id, relation, .}
Table B and C have op_id which is foreign key from table A. In table A op_id is primary key, in table B b_id is primary key and in table C c_id is primary key. In table B supplier_id and op_id may have duplicate records. Now I want to add constraint so that if I delete records from Table B for op_id and if a relationship record exists for op_id in table C then it should not allow me to delete. Is it possible through referential integrity constraint ?
1) CREATE TABLE mutu (id NUMBER, text VARCHAR2(20));
2) INSERT INTO mutu SELECT rownum , 'mutu' FROM dual CONNECT BY LEVEL <= 10000;
3) Insert Duplicate row. INSERT INTO mutu VALUES (42, 'DUPLICATE');
4) COMMIT;
5)Create a NON-UNIQUE INDEX's CONSTRAINT as below. ALTER TABLE mutu ADD CONSTRAINT mutu_pk PRIMARY KEY(id) USING INDEX(CREATE INDEX mutu_pk ON mutu(id)) ENABLE NOVALIDATE;
6) Insert Duplicate row. INSERT INTO mutu VALUES (42, 'DUPLICATE');
7) ERROR at line 1: ORA-00001: unique constraint (SYS.ZIGGY_PK) violated
Why it shows the error. Even though I had created a NON-UNIQUE INDEX's Constraint only.
BANNER ---------------------------------------------------------------- Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi PL/SQL Release 10.2.0.4.0 - Production CORE 10.2.0.4.0 Production TNS for Linux: Version 10.2.0.4.0 - Production NLSRTL Version 10.2.0.4.0 - Production
These error codes I'm getting in production.First of all, I've no duplicates present in that table for which this error has been raised.I've checked the index and related columns as well. NO DATA is there.So NO CHANCE for unique constraint violation.
SELECT * FROM ORDER_OCC_REQUISITION_X_REF WHERE LAB_ORDER_OCC_TEST_ID IN(SELECT LAB_ORDER_OCC_TEST_ID FROM LAB_ORDER_OCC_TEST WHERE LAB_ORDER_OCC_ID = 7944858);
no rows selected
Now when I'm trying to insert one row inside this table I'm getting this error, as you are seeing no records for this occurrence_id.
SELECT * FROM USER_INDEXES WHERE INDEX_NAME = 'ORD_OCC_REQ_UQ_TEST_IX_04'; --ORDER_OCC_REQUISITION_X_REF (Table name) --MERGE_DT, LAB_ORDER_OCC_TEST_ID, TEST_ID, ACTIVE_YN (columns for the index 'ORD_OCC_REQ_UQ_TEST_IX_04') As you can see there is no data then this error should not be raised. Update procedure. /******************************************************************************************************************* * Name : UPDATE_REQUISITION_X_REF * Description : This Procedure update ORDER_OCC_REQUISITION_X_REF table with requisition_id * that was generated due to merge process. * In parameters : IN_merge_id NUMBER The order_ref_no of the orders to be merged (comma seperated) ***********************************************************************************************************************/ PROCEDURE UPDATE_REQUISITION_X_REF ( IN_merge_id IN TT_ORD_REQUISITION_WORK_AREA.merge_id%TYPE) IS
