So I´ve looked trough the web in search for basic date help in sql and nobody seems to be able to help my codes goes like this
create table Hotel
(
id int not null primary key auto_increment,
Name varchar(255)
);
create table Gestur
(
id int not null primary key auto_increment,
nafn varchar(255),
heimili varchar(255),
simi char(7),
netfang varchar(255)
);
create table Bokun
(
id int not null primary key auto_increment,
ID_hotel_fk int references Hotel(id),
ID_gestur_fk int references Gestur(id),
dags_inn date null,
dags_ut date null,
tegund_herbergis char(1)
);
and I can´t seem to get this part right
insert into Bokun
(ID_gestur_fk,ID_hotel_fk,dags_inn,dags_ut,tegund_herbergis)
values
(1,3, 2015-10-25,2016-12-26,"1"),
(2,5, 2015-04-01, 2016-8-24,"3"),
(3,4, 2014-02-24, 2016-12-08,"1"),
(4,2, 2015-04-26, 2016-12-24,"2"),
(5,4, 2015-07-14, 2016-04-23,"1"),
(6,2, 2015-12-12, 2016-09-12,"3"),
(7,3, 2015-12-26, 2016-05-03,"2"),
(8,2, 2013-09-12, 2014-06-10,"1"),
(9,1, 2015-05-26, 2016-12-28,"1"),
(10,5, 2015-03-30, 2016-06-07,"4");
I only get the error
1292 - Incorrect date value: '1980' for column 'dags_inn' at row 1
You need to quote dates with ' and qoute "1" as '1':
insert into Bokun(ID_gestur_fk,ID_hotel_fk,dags_inn,dags_ut,tegund_herbergis)
values(1,3, '2015-10-25','2016-12-26','1');
2015-10-25 is treated as 1980 (aritmetic operation substraction)
SqlFiddleDemo
insert into Bokun
(ID_gestur_fk,ID_hotel_fk,dags_inn,dags_ut,tegund_herbergis)
values
(1,3, '2015-10-25','2016-12-26',"1"),
(2,5, '2015-04-01', '2016-8-24',"3"),
(3,4, '2014-02-24', '2016-12-08',"1"),
(4,2, '2015-04-26', '2016-12-24',"2"),
(5,4, '2015-07-14', '2016-04-23',"1"),
(6,2, '2015-12-12', '2016-09-12',"3"),
(7,3, '2015-12-26', '2016-05-03',"2"),
(8,2, '2013-09-12', '2014-06-10',"1"),
(9,1, '2015-05-26', '2016-12-28',"1"),
(10,5, '2015-03-30', '2016-06-07',"4");
you missed '(quotes).Thanks this helps..
Related
I created some tables but when I want to check if my data is inside it doesn't show anything when
I use select * from Project it just appears null and I don't have null values I'm not sure what I'm doing wrong it just appears that the foreign key is restrict
`create table Department
(
`did integer not null auto_increment,
Dname varchar(50) default 'HR',
location varchar(50) default 'Chicago',
primary key(did)`
);
`create table Employee`
(
Eid integer not null auto_increment,
DepartmentID integer default 5,
Ename varchar(50) default 'Josh',
Erank integer default 2,
Salary real default 5000.00,
primary key(Eid),
foreign key(DepartmentID) references Department(did)
);
/*drop table Project;*/
create table Project
(
Pid integer not null auto_increment,
DepartmentID integer default 5,
Pname varchar(50) default 'Sorting',
budget real default 5000.00,
StartYear integer default 2000,
primary key(Pid),
foreign key(DepartmentID) references Department(did)
);
insert
into Project(DepartmentID, Pname, budget, StartYear)
values(1, 'OS', 5000.00, 2018),
(2, 'Net', 6000.00, 2020);
select *
from Project;
Check this fiddle. There are no rows in Department, so the restraint keeps the insert into Projects from happening. Also, I removed the backticks:
https://dbfiddle.uk/?rdbms=mysql_5.7&fiddle=64f8f0e9cccce2eb2ab77b37fcce54fd
Add COMMIT statements:
create table Project...
commit;
insert into Department values('HR','Chicago');
insert into Department values('Admin','New York');
insert into Project...
commit;
select * from Project;
I have a F1 database and I'm trying to insert the team principal's name (from Principals table) into the Teams table, but for some reason it won't work. I'm not sure if my insert into statement is wrong, but I can't see why it would be. The code is below
CREATE TABLE Teams (
Team_Name VARCHAR(30) NOT NULL,
Driver_1 INT NULL,
Driver_2 INT NULL,
Nation VARCHAR(30) NOT NULL,
Seasons INT NOT NULL,
No_Titles INT NOT NULL DEFAULT 0,
Principal VARCHAR(30) DEFAULT NULL,
PRIMARY KEY (Team_Name));
CREATE TABLE Principals (
Principal_No INT NOT NULL,
Principal_Name VARCHAR(30) UNIQUE NOT NULL,
Team VARCHAR(30) NULL,
Age INT NOT NULL,
Nationality VARCHAR(30) NOT NULL,
Seasons INT NOT NULL DEFAULT 0,
PRIMARY KEY (Principal_No),
FOREIGN KEY (Team) REFERENCES Teams(Team_Name));
Here's the insert statement. The Principals table has already been populated with the principal names and their corresponding teams
INSERT INTO Teams (Principal)
SELECT Principal_Name
FROM Principals
WHERE Team IN(
SELECT Team_Name
FROM Teams);
In your INSERT statement
INSERT INTO Teams (Principal)
-- ^
you're only inserting a value for the field Principal into the table Teams. But the Teams table has other fields as well... not inserting values into them will default them to NULL. This will lead to a contradiction in the arguments. In your Teams table:
Team_Name VARCHAR(30) NOT NULL
Nation VARCHAR(30) NOT NULL
Seasons INT NOT NULL
these fields, by definition, can't be NULL. But since no values are inserted with the INSERT statement, these will default to NULL, clashing with the definition and causing an error.
You may want to consider setting default values for the above fields or modifying your INSERT statement to accommodate those fields.
INSERT INTO Teams (Principal, Team_Name, Nation, Seasons)
SELECT
-- four columns ...
Your insert statement tries to assign null values to columns that have 'not null' property. Check these columns 'not null' -> false or assign default value or define values in your insert statement. I hope this help
I am at the end of my rope. I am learning SQL for a class. I have tried to get something akin to the to work, but to no avail. Can someone take a look at it.
Keep in mind that I'm new to this. I am trying to get the code to make subtotal equal the sum of column qty multiplied by the sum of column donutPrice in the donut table. I can't find much except for joins and if I do that, I can't use the join as a value.
The ultimate goal is to make it kinda automated.
CREATE TABLE donut
(
donutID int(50) not null auto_increment primary key,
donutName varchar(50) not null,
donutDesc varchar(200),
donutPrice dec(8,2)
);
CREATE TABLE customer
(
customerID int(50) not null auto_increment primary key,
fname char(50) not null,
lname char(50) not null,
address varchar(50) not null,
apartment varchar(10),
city char(50) not null,
state char(2) not null,
zip dec(5) not null,
homeph varchar(10),
mobileph varchar(10),
otherph varchar(10)
);
CREATE TABLE invoice
(
orderID int(50) not null auto_increment primary key,
notes varchar(50) not null,
orderdate date not null,
customerID int(50) not null default 1,
foreign key (customerID) references customer(customerID)
);
CREATE TABLE invoice_line_item
(
donutID int(50) not null,
orderID int(50) not null,
qty dec not null,
subtotal dec(10,2),
subtotal= sum('qty'*'donutPrice') FROM (invoice_line_item, donut),
primary key (donutID, orderID),
foreign key(donutID) references donut(donutID),
foreign key(orderID) references invoice(orderID)
);
ALTER TABLE donut AUTO_INCREMENT=1;
ALTER TABLE customer AUTO_INCREMENT=1001;
ALTER TABLE invoice AUTO_INCREMENT=500;
I guess you want a result looking like this:
OrderID subtotal
1 12.50
2 15.00
27.50
You get that with a query like this:
SELECT invoice.orderID, SUM(invoice_line_item.qty * donut.donutPrice) subtotal
FROM invoice
JOIN invoice_line_item ON invoice.orderID = invoice_line_item.orderID
JOIN donut ON invoice_line_item.donutID = donut.donutID
GROUP BY invoice.orderID WITH ROLLUP
Did you cover entity-relationship data in your class? Your entities are invoice, invoice_line_item, and donut (and your other tables). The relationships between them appear in the ON clauses of the JOIN operations.
Start with a query, and get it working. Then you can create a view ... which is nothing more or less than an encapsulated query.
Good afternoon,
Can anyone tell me what's wrong with my code on PHP MY ADMIN, I'm trying to write a CONSTRAINT and create values for the car color in the beginning ( with table creation)
CREATE TABLE T_CAR
(CAR_ID INTEGER NOT NULL PRIMARY KEY,
CAR_MARK CHAR(32) NOT NULL,
CAR_MODEL VARCHAR(16),
CAR_NUMBER CHAR(10) NOT NULL,
CAR_COLOR CHAR(16) CHECK (VALUE IN ('white', 'black', 'red', 'green', 'blue')))
The problem is with the last line (error message syntax not known).
Thanks in advance.
MySQL ignores check expression.
Manual: Create Table
The CHECK clause is parsed but ignored by all storage engines.
Try Enum:
CREATE TABLE T_CAR (
CAR_ID INTEGER NOT NULL PRIMARY KEY,
CAR_MARK CHAR(32) NOT NULL,
CAR_MODEL VARCHAR(16),
CAR_NUMBER CHAR(10) NOT NULL,
CAR_COLOR ENUM('white', 'black', 'red', 'green', 'blue') NOT NULL
)
For the following SQL I get the error:
Data truncation occurred on a write of column 0Data was 0 bytes long and 0 bytes were transferred.
Code:
CREATE TABLE faculty_members
(
fid INTEGER AUTO_INCREMENT PRIMARY KEY,
first_name VARCHAR(30) NOT NULL,
last_name VARCHAR(30) NOT NULL,
rank VARCHAR(25) NOT NULL,
office CHAR(8),
phone CHAR(12),
dob DATE NOT NULL,
salary DECIMAL(8,2),
CONSTRAINT faculty_members_pk PRIMARY KEY(fid),
CONSTRAINT faculty_members_ck UNIQUE(first_name,last_name,dob),
CONSTRAINT valid_salary CHECK(salary > 0)
);
And these are the INSERT statements
INSERT INTO faculty_members(first_name,last_name,rank,office,phone,dob,salary) VALUES
('Charles', 'Xavier', 'Professor', 'HSC 641', '563-555-6020', '11/09/1942', 125000),
('Bruce', 'Banner', 'Associate Professor', 'FO1 120', '563-555-8212', '06/20/1969', 87000),
('Hank', 'McCoy', 'Professor', 'FO1 120', '563-555-8212', '06/20/1972', 95000),
('Jeane', 'Grey', 'Assistant Professor', 'ECS 547', '563-555-8239', '03/19/1975', 95000),
('Erik', 'Lehnsherr', 'Professor', 'HSC 641', '563-555-6020', '11/09/1940', 115000),
('Diana', 'Prince', 'Associate Professor', 'HSC 400', '563-555-8212', '07/28/1967', 105100),
('Logan', 'Wolverine', 'Assistant Professor', 'ECS 540', '563-555-8100', '02/27/1964', 82000),
('Ororo', 'Storm', 'Assistant Professor', 'ECS 540', '563-555-8101', '05/01/1973', 82500);
Your dob values are incorrect. MySQL's date format is yyyy-mm-dd. Most like you're getting the default 0000-00-00 stored and the data truncation error from that.
In our case, we were adding a value exceeding the column size.