I'm new to learning SQL. When I create this table, it has an Asterix (*) under the first parenthesis of the "(dbClassID)" and says "missing right parenthesis"
Does anyone know why it does that and how I can fix it?
CREATE TABLE vod_classification (
dbClassId CHAR(4) NOT NULL,
dbDescription VARCHAR2(100)
CONSTRAINT vod_classification_PK PRIMARY KEY (dbClassId)
);
CONSTRAINT is part of table creation and need to be comma delimited as other column:
CREATE TABLE zz_classification (
dbClassId CHAR(4) NOT NULL,
dbDescription VARCHAR2(100),
CONSTRAINT vod_classification_PK PRIMARY KEY( dbClassId)
);
Tables contain columns and constraints
you are missing , here try this VARCHAR2(100),
For a single-column constraint, it's neater to define it inline as part of the column:
create table vod_classification
( dbclassid varchar2(4) not null constraint vod_classification_pk primary key
, dbdescription varchar2(100) not null constraint vod_classification_uk unique
);
I have corrected the CHAR column to the standard string type which is VARCHAR2 in Oracle.
(PK columns will be not null automatically, but I've left it in for completeness and in case you later create table as select.)
When using the "Create" code, you must use a comma in the line where you define each column of the table. Except the last column. You can read the oracle sql syntax link as follows: https://docs.oracle.com/cd/E11882_01/server.112/e41085/sqlqr01001.htm#SQLQR110
Related
I created a view called "view_employee" like this:
CREATE VIEW view_employee AS
SELECT employee.surname || ', ' || employee.name AS comp_name, employee.sex, sections.name AS section_name, employee_age
FROM sections, employee WHERE employee.section = sections.sect_code;
And I would like to insert data into the table using the view, like this:
INSERT INTO view_employee VALUES ('Doe, John', 'm', 'Marketing', 34);
Here are the tables' columns and constraints:
create table sections(
sect_code number(2),
name varchar2(20),
income number(5,2)
constraint CK_sections_income check (income>=0),
constraint PK_sections primary key (sect_code)
);
create table staff(
ident number(5),
document char(8),
sex char(1)
constraint CK_staff_sex check (sex in ('f','m')),
surname varchar2(20),
name varchar2(20),
address varchar2(30),
section number(2) not null,
age number(2)
constraint CK_staff_age check (age>=0),
marital_status char(10)
constraint CK_employee_marital_status check (marital_status in
('married','divorced','single','widower')),
joindate date,
constraint PK_employee primary key (ident),
constraint FK_employee_section
foreign key (section)
references sections(sect_code),
constraint UQ_staff_document
unique(document)
);
The error message I get when attempting to insert is the following:
Error starting at Command Line: 1 Column : 1
Error report -
SQL Error: ORA-01733: virtual column not allowed here
01733. 00000 - "virtual column not allowed here"
*Cause:
*Action:
How could I insert those values into the table using the view? Thanks in advance.
A view must not contain any of the following constructs. So, it can be updateable.
A set operator
A DISTINCT operator
An aggregate or analytic function
A GROUP BY, ORDER BY, MODEL, CONNECT BY, or START WITH clause
A collection expression in a SELECT list
A subquery in a SELECT list
A subquery designated WITH READ ONLY
Joins, with some exceptions, as documented in Oracle Database
Administrator's Guide.
I've tried to search but nothing works, and I don't know what to do.
There's a table with two foreign keys, one of which can be null. According to what I've searched, it's perfectly fine to have null foreign keys. But no matter what, when I try to insert a null in that value, it fails. It says:
*Cause: A foreign key value has no matching primary key value.
*Action: Delete the foreign key or add a matching primary key.
Here is the code of the table. The FK that I want to be null is idPedido
CREATE TABLE PAGOS(
fechaLimite DATE,
cuantia NUMBER NOT NULL,
fechaInicio DATE DEFAULT SYSDATE,
fechaLiquidacion DATE,
idPago VARCHAR(8) NOT NULL,
dni VARCHAR(14) NOT NULL,
tipoPago VARCHAR(7) DEFAULT 'OTRO' CHECK(tipoPAGO IN('MENSUAL','PEDIDO','OTRO')),
idPedido VARCHAR2(10),
PRIMARY KEY(idPago),
FOREIGN KEY(dni) REFERENCES MIEMBROS ON DELETE SET NULL,
FOREIGN KEY(idPedido) REFERENCES PEDIDOS ON DELETE SET NULL
);
There are some triggers and such to add sequences for the idPago value.
Here is the code of the procedure that creates a new item to the table:
create or replace PROCEDURE CREAR_PAGO(
new_fechaLimite IN PAGOS.fechaLimite%TYPE ,
new_cuantia IN PAGOS.cuantia%TYPE,
new_fechaInicio IN PAGOS.fechaInicio%TYPE,
new_fechaLiquidacion IN PAGOS.fechaLiquidacion%TYPE,
new_dni IN PAGOS.dni%TYPE,
new_tipoPago IN PAGOS.tipoPago%TYPE,
new_idPedido IN PAGOS.idPedido%TYPE
)
IS
BEGIN
INSERT INTO PAGOS(fechaLimite,cuantia,fechaInicio,fechaLiquidacion,dni,tipoPago,idPedido) VALUES(new_fechaLimite,new_cuantia,new_fechaInicio,new_fechaLiquidacion,new_dni,new_tipoPago,new_idPedido);
END CREAR_PAGO;
And here is me trying to insert a new element:
execute CREAR_PAGO('01012020',40,'01012010',null,49035480D,null,null);
I've already tried to put both "NULL" and "DEFAULT NULL" in the table code after idPedido's type and nothing works
Please I need help
It looks like the primary key for your table is idPago, but I don't see it in your insert statement. If that is the case, it would appear that your issue is trying to add a record with no primary key...not that the foreign key is null.
How can I specify, 5 distinct values for a varchar column in Oracle Application Express?
I need a column called tipo_conta (varchar) that only accepts 'Conta a ordem', 'Multibanco', 'Rendimento', 'Jovem', 'Rendimento-Habitacao' as possible values.
I tried this but I get this error - ORA-00907: missing right parenthesis.
What am I doing wrong?
CREATE TABLE contas
(
id_conta NUMBER(6),
tipo_conta VARCHAR2(20),
CONSTRAINT id_conta PRIMARY KEY(id_conta),
CONSTRAINT tipo_conta UNIQUE (tipo_conta)
CONSTRAINT chk_tipo_conta CHECK (Frequency IN ('Conta a ordem', 'Multibanco', 'Rendimento', 'Jovem', 'Rendimento-Habitacao'))
);
Actually it looks like you are missing a comma in your CONSTRAINT CLAUSES over here:
CONSTRAINT tipo_conta UNIQUE (tipo_conta)
should instead be:
CONSTRAINT tipo_conta UNIQUE (tipo_conta),
Also your CHECK does not reference the column properly:
Instead of CONSTRAINT chk_tipo_conta CHECK (Frequency IN ...
try CONSTRAINT chk_tipo_conta CHECK (tipo_conta IN ...
I want to ensure that only the values 'Expert', 'Average' or 'Adequate' are entered into the levelOfExpertise column of this table, however whenever I do try an enter one of those values, it returns an error saying the value entered is too short. Here is the create table query for this particular table. The the column I am referring to is levelOfExpertise:
CREATE TABLE MusicianInstrument
(
musicianNo varchar(5) not null
CONSTRAINT MI_PK1 REFERENCES Musician(musicianNo),
instrumentName varchar(50) not null
CONSTRAINT MI_PK2 REFERENCES Instrument(instrumentName),
levelOfExpertise varchar(50),
CONSTRAINT levelOfExpertise CHECK (levelOfExpertise = 'Expert', 'Adequate', 'Avergage'),
PRIMARY KEY(musicianNo,instrumentName)
);
Any ideas how I can ensure only those three values (Expert, Adequate or Average) can be entered?
Thanks
Use the IN operator
CHECK (levelOfExpertise IN ('Expert','Adequate','Avergage'))
Try to change your CHECK constraint as following:
CONSTRAINT levelOfExpertise CHECK (levelOfExpertise IN ('Expert','Adequate','Avergage'))
I suppose that you use sql server as RDBMS.
I use SQL Server 2008
I use a CHECK CONSTRAINT on multiple columns in the same table to try to validate data input.
I receive an error:
Column CHECK constraint for column
'AAAA' references another column,
table 'XXXX'.
CHECK CONSTRAINT does not work in this way.
Any other way to implement this on a single table without using FK?
Thanks
Here an example of my code
CREATE TABLE dbo.Test
(
EffectiveStartDate dateTime2(2) NOT NULL,
EffectiveEndDate dateTime2(2) NOT NULL
CONSTRAINT CK_CmsSponsoredContents_EffectiveEndDate CHECK (EffectiveEndDate > EffectiveStartDate),
);
Yes, define the CHECK CONSTRAINT at the table level
CREATE TABLE foo (
bar int NOT NULL,
fred varchar(50) NOT NULL,
CONSTRAINT CK_foo_stuff CHECK (bar = 1 AND fred ='fish')
)
You are declaring it inline as a column constraint
...
fred varchar(50) NOT NULL CONSTRAINT CK_foo_fred CHECK (...)
...
Edit, easier to post than describe. Fixed your commas.
CREATE TABLE dbo.Test
(
EffectiveStartDate dateTime2(2) NOT NULL,
EffectiveEndDate dateTime2(2) NOT NULL, --need comma
CONSTRAINT CK_CmsSponsoredContents_EffectiveEndDate CHECK (EffectiveEndDate > EffectiveStartDate) --no comma
);
Of course, the question remains are you using a CHECK constraint where it should be an FK constraint...?
Check constraints can refer to a single column or to the whole record.
Use this syntax for record-level constraints:
ALTER TABLE MyTable
ADD CONSTRAINT MyCheck
CHECK (...your check expression...)
You can simply apply your validation in a trigger on the table especially that either way the operation will be rolled back if the check failed.
I found it more useful for CONSTRAINT using case statements.
ALTER TABLE dbo.ProductStock
ADD
CONSTRAINT CHK_Cost_Sales
CHECK ( CASE WHEN (IS_NOT_FOR_SALE=0 and SAL_CPU <= SAL_PRICE) THEN 1
WHEN (IS_NOT_FOR_SALE=1 ) THEN 1 ELSE 0 END =1 )