I have table EMP & DEPT.
Can you give me sample "check" constraint so that when I enter an EMP (with status='active') without matching DEPT entry, the process will fail?
It will allow to enter EMP with status='inactive' only even if no matching DEPT entry. So foreign_key will not apply.
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.
I've successfully created the below two tables (disregard my use of "char" variable type; beyond the scope of my question):
create table Test_req (
Req_ID varchar2(4) not null,
Req_Comment varchar2(50) null
);
create table Test_n_cycle (
Req_ID varchar2(4) not null,
[code].....
Then I successfully performed the two alter statements:
Alter table test_n_cycle
add constraint test_n_cycle_pk primary key (req_id, test_id);
Alter table test_req
add constraint test_req_pk primary key (req_id);
Then tried this freign key reference statement
Alter table test_n_cycle
add constraint
foreign key (req_id) references test_req (req_id)
Error report:
SQL Error: ORA-00902: invalid datatype
00902. 00000 - "invalid datatype"
Is this because req_id is also defined in the Primary key definitions on these two tables, thus making the field not valid for referential constraint definition?
i have a field in my table office i got field office_code ,this field is been used in diffirent tables as foreign key is there a sql i can wirte to see all tables who have used this field as foreign key.
View 12 Replies View Relatedwhat is the difference between assertions and check constraint?
View 9 Replies View RelatedHow 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?
i have a table for example :
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 ?
I'm trying to create a new table which has a date field (date of birth) and I want to include a constraint which will not allow me to add values if they are over 21 years old. I'm using SQLPlus .
View 3 Replies View RelatedI use Oracle 10.0.2.0.1.If I create a table with constraint key; after that I create an unique index key, I got an error. Does it mean when I create a table with constraint the unique index are automatically created and I could not create index key as I did as below?
create table test_const(ename varchar2(50) not null,
key_num number not null,
descr varchar2(100),
constraint constraint_test_const unique (ename, key_num));
create unique index test_const_idx on test_const
(
"ENAME","KEY_NUM"
)
tablespace tmp_data;
Error report: SQL Error: ORA-01408: such column list already indexed 01408. 00000 - "such column list already indexed" added [pre] tags by Sriram
Create table Car
(Car_cd VARCHAR2(5),
Car_Desc VARCHAR2(50)
);
alter table Car
add constraint Car_PK primary key (Car_CD);
INSERT INTO Car (Car_Cd, Car_Desc) VALUES ('CORLA','COROLLA');
Commit;
[code]....
The requirement necessitates a new table to map car to manufacturer. This mapping table may later be expanded to contain other attributes Engine, MPG, etc to hold details specific to a car.But this is in future.
Create Table Car_Mapping_Details
(Car_Cd VARCHAR2(5),
Manufacturer_Cd VARCHAR2(5));
--Primary Key Constraint
ALTER TABLE Car_Mapping_Details
ADD CONSTRAINT Car_Mapping_Details_pk PRIMARY KEY (Car_Cd );
--Not able to create this as Car_cd is already a PK in this table and therefore has Unique Index
ALTER TABLE Car_Mapping_Details ADD CONSTRAINT Car_Mapping_Details_fk1
FOREIGN KEY (Car_Cd)REFERENCES Car (Car_Cd);
[code]....
But in this case the Car_Mapping_Details.Car_cd is itself is a primary key and therefore has Unique index.Although I was able to create foreign key constraint on Car_mapping_details.car_cd column (which is also Primary Key), I was not able to create Foreign Key Index on this column. It gives me Quote:ORA-01408: such column list already indexed.In other words, not creating foreign index for foreign key column lead to table-level lock? Or will the Unique Index in that primary key column be sufficient to avoid table-level lock?
Why can't we create null constraint on table level?
View 20 Replies View Relatedi'm new to oracle environment.how can i specify NONCLUSTERD INDEX on Primary cloumn during table creation.By default it will create clusterd index but i need non-clusterd index on it.
I'm using following stmt to create normal primary constarint during table creation,
CONSTRAINT PKFORM_PROPS PRIMARY KEY (FORM_PROPS_PK) USING INDEX TABLESPACE DB123_INDEX
how can i change the above query, so that it should create NONCLUSTERED INDEX on Primary key column.
, I'd like to create a constraint (when creating a table) that checks to ensure that the 'Year' entered is less than or equal to the current year (based off SYSDATE). Per the code below, I keep getting the same error, "missing right parenthesis". I've spent more than an hour trying different ways to get this to work, but I've been failing miserably. I am using Oracle 11g Express.
CREATE TABLE TEST (Name VARCHAR2(7) PRIMARY KEY, Year NUMBER(4), CONSTRAINT TEST_YEAR_CK CHECK (Year <= (TO_NUMBER(TO_CHAR(SYSDATE, 'YYYY')))FROM DUAL);
*ERROR at line 4:ORA-00907: missing right parenthesis
is it possible to create primary key on view and use this view for creating foreign key .
View 3 Replies View Related1.How to check a user has 'create table' privilege?
2.how to check a user has privilege to grant 'create table' privilege to other user ?
How can I create a trigger to check if synonym already exists in db and if exists then don't create synonym.
my work: ( this is just like an outline i prepared)
select * from all_synonyms;
declare
s_exists number;
begin
-- check whether the synonym exists
select 1 into s_exists from all_synonyms;
-- an error gets raise if it doesn't
exception when no_data_found then
-- DDL has to be done inside
execute immediate ' create or replace synonym';
end;
/
I have 20 or so tables, partitioned by range, indexed etc...soon these tables will be gone and i have to recreate them with the same definitions. I have to write a procedure(or script, it's up to me) which must:
1- check if table A exist in the scheme
2- if not create the table as the original ddl.
for 1 i've used smth like
-------------------------
SELECT count(*)
INTO a
FROM user_objects
WHERE object_name='A';
[code]....
so my question is how and what is the cleanest and fastest way to do this.? it's a lot DDLs,
how can i create procedure to check username and password.
View 10 Replies View RelatedI'm new to oracle DB,i've been given access to Oracle as a user. when i try to create a table under my default schema i get the insufficient privileges error.
How do i check from the system views if i have create table privilege under my own schema?
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)
View 1 Replies View RelatedI want to put one check box to check all the check boxes.how can i do this?
View 5 Replies View Relatedif have table primary key in this table empno and another table foreign key is empno and when add in the primary key 5522 how can
5522 in the empno "foreign key" automatic
I have an already populated table that refers to a wrong foreign key in another table. I have table abc that has the column fk_id. this column currently refers to column x_id1 in the table abc while it should refer to column x_id2 in xyz. I am trying to replace the data but I guess I miss something in the logic or the right way of doing it:
following is my trial:
create table abc
(
pk_id number(4) primary key,
abc_name varchar2(10),
fk_id number(4)
);
create table xyz
(
x_id1 number(4),
x_id2 number(4),
x_name varchar2(10)
);
commit;
insert all
into abc values (10,'ab1',1)
into abc values (11,'ab2',2)
into abc values (12,'ab3',5)
into abc values (13,'ab4',7)
into abc values (14,'ab5',9)
into xyz values (1,1,'d1')
into xyz values (2,2,'d2')
into xyz values (5,3,'d3')
into xyz values (7,4,'d4')
into xyz values (9,5,'d5')
select * from dual;
commit;
--this following select returns 5 rows
select * from abc, xyz where abc.fk_id = xyz.x_id1;
-- the following update only updates 3 rows and sets the other 2
-- to null!
update abc set fk_id = (select x_id2 from xyz where xyz.x_id1 = abc.fk_id);
commit;
select * from abc;
I'm not really sure why oracle is not finding my Foreing Key, I'm creating an easy set of table for a company and I'm declaring all Primary keys and foreing keys as necessary and this is my
CREATE TABLE Items
(ItemID NUMBER(5) NOT NULL,
Description VARCHAR2(30),
ListPrice NUMBER(9,2) NOT NULL,
QtyOnHand Number(5),
ReorderPoint NUMBER(3),
ReorderQty NUMBER(3),
OnBackOrder Number(3),
CONSTRAINT ItemsPK
[Code] ............
There's three sets of inserts the first two successfully inserts the data NO problem but when i try to insert the data on SupplierItems comes as:
ERROR at line 1:
ORA-02291: integrity constraint (jcarter.SUPPLIERITEMSFK2) violated - parent key not found
I looked on the forum and it appears this happens when someone is doing a Insert ALL but this is not my case..
You should almost always index foreign keys because they are frequently used in joins. In addition, if you intend to delete or update unique or primary keys on the parent table, you should index the foreign keys to improve the locking of child records.what I don't understand are, I should create index on foreign key column in parent table or child table or both ?
View 1 Replies View RelatedIs there any view in oracle which gives the foreign key mapping.
E.g.
Table DEPT has DEPTNO as PK.
Table Emp has DEPTNO as FK to DEPT.DEPTNO.
I can get the information for DEPT table from R_CONSTRAINT_NAME column of all_constraints table.My requirement is to get the the which column of Emp table refers to DEPT.DEPTNO column .
Say we have an employee(id_emp) table with a primary key on id_emp. We have also some history tables emp_stuff with columns say (id_emp, dat_event, some_stuff) with primary key id_emp, dat_event.
This means that we have a unique index on (id_emp,dat_event). We also have a foreign key id_emp that references employee(id_emp). When we update id_emp on employee, we still have a lock on emp_stuff. According to this (end of the page) :
Quote:So, in short, with releases prior to Oracle Database 11g Release 1, you will want an index on the foreign key of the child table if you do any of the following:
Update the parent table primary key
Delete from the parent table
Merge into the parent table
So is id_emp in emp_stuff considered as indexed (through the unique index of the primary key) or do we have to add an explicit index
like this CREATE INDEX emp_stuff ON emp_stuff(id_emp) to avoide child table locks?
