Selecting data from other table using a foreign key? - mysql
So I'm trying to get the clan tag from ranks table for a specific member_id. But I don't understand how to do that. I used INNER JOIN commands but nothing works.
CREATE TABLE ranks(
rank VARCHAR(8),
tag VARCHAR(18) NOT NULL,
PRIMARY KEY(rank)
);
CREATE TABLE member(
member_id INT UNSIGNED AUTO_INCREMENT,
first_name VARCHAR(15) NOT NULL,
last_name VARCHAR(15),
ign VARCHAR(20) NOT NULL,
rank VARCHAR(8) NOT NULL,
joined_date DATE NOT NULL,
dob DATE,
sex ENUM('M','F') NOT NULL,
country VARCHAR(3) NOT NULL,
PRIMARY KEY(member_id),
FOREIGN KEY(rank) REFERENCES ranks(rank)
);
INSERT INTO ranks VALUES
('Founder','|NoMercy|King'),
('Admin','^1|NoMercy|^7'),
('TmpAdmin','^5|NoMercy|^7'),
('Pro','^1|NoMercy PRO|^7'),
('Member','^4|NoMercy|^7'),
('Banned','BANNED');
INSERT INTO member VALUES
(NULL,'Reznov','NULL','REZ','Member','2017/12/22','1954/02/28','M','RUS'),
(NULL,'Amanda','NULL','S3XXY|G!RL|','Pro','2018/01/05','1992/01/25','F','USA'),
(NULL,'Elmasri','Navathe','INDIAN_Noob _XOX','TmpAdmin','2018/04/02','1960/08/25','M','IND'),
(NULL,'Tony','Silva','Cool KiD','Member','2018/04/26','1988/02/22','M','BR'),
(NULL,'Hashan','NULL','Big Papa','Member','2018/05/08','1996/06/12','M','NZ'),
(NULL,'Emma','Watson','EmmaXXX','Banned','2018/06/10','1985/05/22','F','UK');
I need to output the correct tag for specific member. It should only display the tag.
Please help!
below query should be worked
SELECT tag FROM ranks INNER JOIN member ON ranks.rank=member.rank
where member_id=1;
http://www.sqlfiddle.com/#!9/e90392/1
tag
^4|NoMercy|^7
Related
sql JOIN cause double rows
I have two tables that i need to join them first table i created using this sql query CREATE TABLE `users` ( `id` bigint PRIMARY KEY AUTO_INCREMENT, `user_login` varchar(60), `user_pass` varchar(255), `first_name` varchar(30), `last_name` varchar(30), `user_status` int(2), `user_phone_number` varchar(20), `user_email` varchar(100), `user_billing_info` text, `user_temp_units` int(2), `user_flow_units` int(2), `user_notes` text ); second table CREATE TABLE `station_meta` ( `uid` VARCHAR(25) PRIMARY KEY, `nickname` varchar(30), `install_date` date, `latatude` numeric(10,6), `longitude` numeric(10,6), `firmware_ver` varchar(10), `weir_type` int(2), `weir_width` numeric, `dist_to_ground` numeric, `dist_to_weir` numeric, `service_fee` numeric, `notes` text ); i got double rows when i use this sql query SELECT * FROM station_meta JOIN users note: uid is something like 9C9Z454Z5CA in case it need to mention it so there's not any column that is the same in the other table UPDATE Data sample My results I'm using it in php function in foreach, so i got double results Appreciate any help
seems you miss a relation between the two tables .. if you want avoid cartesian product and retrieve just a matching value between the two table you should add a relation as table user_station_meta ( `id` bigint PRIMARY KEY AUTO_INCREMENT, user_id bigint station_meta_uid VARCHAR(25) ) once you have inserted the matching values uid, id 9c2748.. 1 BC8CD4.. 5 you can select single matching result as select u.*. s.* from user_station_meta us JOIN station_meta s on s.uid = us.uid JOIN users u on u.id = us.id
MySQL INSERT INTO statement giving ERROR CODE 1062
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
Correct SQL Multiply across tables
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.
Auto_increment trigger
I need to auto_increment the primary key in a mysql database using a trigger. Unfortunately, I am not quite sure how to do this. In the sample code I have provided, I need the employee table primary key to auto_increment beginning with an empty table and a starting value of 200. Then, I need each new insert to increment by 1.Thanks for looking and I hope you are able to help me. CREATE TABLE department ( dept_name VARCHAR(50) NOT NULL Primary Key ); CREATE TABLE employee ( emp_id INT(6) unsigned Default 0 Not NULL , last_name VARCHAR(25) NOT NULL , first_name VARCHAR(40) NOT NULL , dept_name VARCHAR(50) NOT NULL , PRIMARY KEY(emp_id, dept_name) , FOREIGN KEY(dept_name) REFERENCES department (dept_name) );
There are several things you need to do:
Declare the emp_id column as AUTO_INCREMENT;
Set the value of AUTO_INCREMENT property of the table to 200;
Do not provide any value for column emp_id when you INSERT rows in table employee.
Change the table creation as below:
CREATE TABLE employee (
emp_id INT(6) UNSIGNED NOT NULL AUTO_INCREMENT,
last_name VARCHAR(25) NOT NULL,
first_name VARCHAR(40) NOT NULL,
dept_name varchar(50) NOT NULL
PRIMARY KEY(emp_id),
FOREIGN KEY(dept_name) REFERENCES department_tbl(dept_name)
) AUTO_INCREMENT=200;
If the table has an AUTO_INCREMENT column then it must be the PRIMARY KEY of the table. I removed dept_name from the definition of the PK above. I also removed the default value 0 from the emp_id column. It's default value is generated by MySQL using the AUTO_INCREMENT policy.
When you INSERT a new record into the employee table all you have to do is to not provide any value for the emp_id column:
INSERT INTO employee (last_name, first_name, dept_name)
VALUES ('Doe', 'John', 'accounting');
Then use the LAST_INSERT_ID() MySQL function to retrieve the value of the emp_id generated on insertion.
The language or the library you use to develop the client application probably has a function that wraps LAST_INSERT_ID() and returns its value.
What's wrong with this SELECT Statement?
I'm getting this error:
You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use
near '' JOIN `shirts_link` ON `shirts_link`.`shirt_id`=`shirts`.`id`
JOIN `shirt_sizes' at line 1
I've been combing over it for nearly a half an hour now and can't figure it out. Can someone please point it out to me? Here's the code.
SELECT
`shirts`.`shirt_name`,
`shirts`.`men` AS `main_photo`,
GROUP_CONCAT ( `shirt_sizes`.`size_name` ) AS `sizes`
FROM
`shirts`
JOIN
`shirts_link` ON `shirts_link`.`shirt_id`=`shirts`.`id`
JOIN
`shirt_sizes` ON `shirt_sizes`.`id`=`shirts_link`.`size_id`
JOIN
`shirt_prices` ON `shirt_prices`.`id`=`shirts_link`.`price_id`
WHERE `men`!=''
GROUP BY
`shirt_prices`.`price_cat`
In case the problem goes deeper than this script, here's the other tables I'm trying to tie together.
Shirts Table
CREATE TABLE shirts (
id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY NOT NULL,
shirt_name VARCHAR(20) NOT NULL,
men VARCHAR(10) NULL,
women VARCHAR(10) NULL,
boys VARCHAR(10) NULL,
girls VARCHAR(10) NULL,
babies VARCHAR(10) NULL,
)ENGINE=INNODB;
INSERT INTO shirts(shirt_name,men,women,boys,girls,babies) VALUES
('Crewneck Tee','me_crn','wo_crn','bo_crn','gi_crn','ba_crn'),
('V-Neck Tee','me_vnc','wo_vnc','','',''),
('Scoop Neck Tee','','wo_sco','','',''),
('Raglan Tee','me_rag','wo_rag','bo_rag','gi_rag',''),
('Ringer Tee','me_rin','wo_rin','bo_rin','gi_rin',''),
('Cap Sleeve Tee','','wo_cap','','gi_cap',''),
('Tank Top','me_tan','wo_tan','bo_tan','gi_tan',''),
('Spaghetti Strap','','wo_spa','','',''),
('Hoodie','me_hod','wo_hod','bo_hod','gi_hod','ba_hod'),
('Onsie','','','','','ba_ons');
Size Table
CREATE TABLE shirt_sizes (
id INT UNSIGNED AUTO_INCREMENT NOT NULL PRIMARY KEY,
size_name VARCHAR(10) NOT NULL
)ENGINE=INNODB;
INSERT INTO shirt_sizes(size_name) VALUES
('new born'),
('6 months'),
('12 months'),
('18 months'),
('2T'),
('3T'),
('4T'),
('5T'),
('x-small'),
('small'),
('medium'),
('large'),
('1x-large'),
('2x-large'),
('3x-large'),
('4x-large'),
('5x-large');
Price Table
CREATE TABLE shirt_prices (
id INT UNSIGNED AUTO_INCREMENT NOT NULL PRIMARY KEY,
price_cat VARCHAR(10) NOT NULL,
price NUMERIC(6,2) NOT NULL
)ENGINE=INNODB;
INSERT INTO shirt_prices(price_cat,price) VALUES
('crn_01','25.40'),('crn_02','26.30'),('crn_03','27.20'),('crn_04','28.10'),
('crn_05','29.11'),
('vnc_01','26.21'),('vnc_02','27.11'),('vnc_03','28.01'),('vnc_04','29.02'),
('vnc_05','30.80'),
('sco_01','28.10'),
('rag_01','29.22'),('rag_02','30.44'),('rag_03','31.70'),('rin_01','29.22'),
('rin_02','30.44'),('rin_03','31.70'),
('cap_01','29.04'),('cap_02','30.26'),
('tan_01','25.31'),('tan_02','26.21'),
('spa_01','26.30'),('spa_02','27.11'),
('hod_01','35.21'),('hod_02','36.11'),('hod_03','37.10'),('hod_04','38.11');
Shirt Link Table
CREATE TABLE shirts_link (
adult VARCHAR(1) NOT NULL,
kids VARCHAR(1) NOT NULL,
babies VARCHAR(1) NOT NULL,
shirt_id INT UNSIGNED NOT NULL,
size_id INT UNSIGNED NOT NULL,
price_id INT UNSIGNED NOT NULL,
PRIMARY KEY (shirt_id,size_id,price_id),
FOREIGN KEY (`shirt_id`) REFERENCES `shirts`(`id`),
FOREIGN KEY (`size_id`) REFERENCES shirt_sizes(`id`),
FOREIGN KEY (`price_id`) REFERENCES shirt_prices(`id`)
)ENGINE=INNODB;
INSERT INTO shirts_link (adult, kids, babies, shirt_id, size_id, price_id) VALUES
('n','n','y','1','1','1'),('n','n','y','1','2','1'),('n','n','y','1','3','1'),('n','n','y','1','4','1'),
('n','n','y','1','5','1'),('n','n','y','1','6','1'),('n','n','y','1','7','1'),('n','n','y','1','8','1'),
('n','y','n','1','9','1'),('y','y','n','1','10','1'),('y','y','n','1','11','1'),('y','y','n','1','12','1'),
('y','y','n','1','13','1'),('y','n','n','1','14','2'),('y','n','n','1','15','3'),('y','n','n','1','16','4'),
('y','n','n','1','17','5'),
('y','n','n','2','10','6'),('y','n','n','2','11','6'),('y','n','n','2','12','6'),('y','n','n','2','13','6'),
('y','n','n','2','14','7'),('y','n','n','2','15','8'),('y','n','n','2','16','9'),('y','n','n','2','17','10'),
('y','n','n','3','10','11'),('y','n','n','3','11','11'),('y','n','n','3','12','11'),('y','n','n','3','13','11'),
('y','n','n','3','14','11'),
('y','y','n','4','10','12'),('y','y','n','4','11','12'),('y','y','n','4','12','12'),('y','y','n','4','13','12'),
('y','n','n','4','14','13'),('y','n','n','4','15','14'),
('y','y','n','5','10','15'),('y','y','n','5','11','15'),('y','y','n','5','12','15'),('y','y','n','5','13','15'),
('y','n','n','5','14','16'),('y','n','y','5','15','17'),
('y','y','n','6','10','18'),('y','y','n','6','11','18'),('y','y','n','6','12','18'),('y','y','n','6','13','18'),
('y','n','n','6','14','19'),
('y','y','n','7','10','20'),('y','y','n','7','11','20'),('y','y','n','7','12','20'),('y','y','n','7','13','20'),
('y','n','n','7','14','21'),
('y','n','n','8','10','22'),('y','n','n','8','11','22'),('y','n','n','8','12','22'),('y','n','n','8','13','22'),
('y','n','n','8','14','23'),
('n','n','y','9','5','24'),('n','n','y','9','6','24'),('n','n','y','9','7','24'),('n','n','y','9','8','24'),
('n','n','y','9','9','24'),('y','y','n','9','10','24'),('y','y','n','9','11','24'),('y','y','n','9','12','24'),
('y','y','n','9','13','24'),('y','y','n','9','14','25'),('y','n','n','9','15','26'),('y','n','n','9','16','27'),
('y','n','n','9','16','25'),
('n','n','y','10','1','1'),('n','n','y','10','2','1'),('n','n','y','10','3','1'),('n','n','y','10','4','1');
Where clause belongs after the entire from clause, meaning after all the joins.
You have this WHERE clause in the wrong place: WHERE `men`!='' Move it in front of your GROUP BY clause. UPDATE: Here is a reformatted version of your query: SELECT `shirts`.`shirt_name` , `shirts`.`men` AS `main_photo` , GROUP_CONCAT ( `shirt_sizes`.`size_name` ) AS `sizes` FROM `shirts` JOIN `shirts_link` ON `shirts_link`.`shirt_id`=`shirts`.`id` JOIN `shirt_sizes` ON `shirt_sizes`.`id`=`shirts_link`.`size_id` JOIN `shirt_prices` ON `shirt_prices`.`id`=`shirts_link`.`price_id' WHERE `men` != '' GROUP BY `shirt_prices`.`price_cat`