I have two different table in phpmyadmin. One is tbl_user and another is donate.
Now I want to take the column donation_date from tbl_user and all columns from the donate table. I want to join one column (donation_date) from tbl_user table and all cloumns from donate table, but dont know how to write the query.
In the below code I just wrote the query of donate table so how can I join the donation_date from the tbl_user.
Here is my details of two tables in phpmyadmin.
tbl_user table :
donate table:
$db = new PDO('mysql:host=localhost;dbname=mypro_bms','root','');
$statement = $db->prepare(
"insert into donate(passport_ic,blood_group,blood_bag,)
values(:passport_ic, :blood_group, :blood_bag)"
);
I want to take the column donation_date from tbl_user and all columns from the donate table.
Are you looking for... a simple JOIN between tables tbl_user and donate?
From your schema images, it looks like column passport_IPC can be used to join the tables. Then you can choose which columns to return in the SELECT clause:
SELECT u.donation_date, d.*
FROM tbl_user u
INNER JOIN donate d ON d.passport_IPC = u.passport_IPC
Looks like Passport_IC is the common column between the two tables?
You really should use be using numeric, indexed columns. But since you have a small DB, this should work:
SELECT d.*, u.donation_date
FROM donate d
INNER JOIN tbl_user u ON u.Passport_IC = d.Passport_IC
EDIT: You should give your a tbl_user table a primary key as well. Look into database normalization: https://en.wikipedia.org/wiki/Database_normalization
As you said, you want to take the column donation_date from tbl_user so you will select just the column nedded tbl_user.donation_date ans use the following alias donation_date and to get all columns from the donate table you can use this trick donate.*, it gets all column
SELECT
donate.* , tbl_user.donation_date as donation_date
FROM
tbl_user
JOIN
donate ON donate.passport_IPC = tbl_user.passport_IPC
Related
This might be a dumb and very simple question, but I'm stuck and I've tried multiple ways already. So I have this code:
$RefLinksRAW = $GLOBALS['DATABASE']->query("
SELECT u.id, u.username FROM ".USERS." as u
LEFT JOIN ".TURNAMENT." as s
ON s.id_owner = u.id;");
But I want to also SELECT columns from TURNAMENT that corresponds to s.id_owner, how do I do that?
Basically I want to make a table that shows contents from both of those tables.
This is the TURNAMENT table, I want to make sure that 'id' from USERS table is same as 'id_owner' and also select 'wons' column
You can just add the columns you are after to the SELECT section. For example,
SELECT
u.id,
u.username,
s.somecolumn,
s.someothercolumn
FROM
users u
LEFT JOIN
turnament s ON s.id_owner = u.id;
Replace users and turnament with your actual table names, and somecolumn/someothercolumn with the columns you are after.
I am just tinkering with SQL as I am trying to get into more complex statements. I don't know this qualifies for it or not but please guide how to go about it.
I have looked at JOINS and some question of Multiple Select Statements but unable to understand them correctly.
I have the following two tables:
emp table:
emp_id, name, address, org_id
books table:
id, emp_id, status, org_id
where emp_id in books table is foreign key referencing emp table.
I need to fetch all the records from books table of a particular org. But along with that I need to get all the data of respective employee like name, address along the result.
Please guide me in the right direction.
Thanks
Try this
select B.*,E.name,E.address from books B
inner join employee E
on B.emp_id=E.emp_id
where B.org_id=1;
I took value of of org_id as 1 for test purpose.
SELECT books.id, books.emp_id, books.status, books.org_id, emp.name, emp.address
FROM books
JOIN emp ON emp.emp_id = books.emp_id
WHERE books.org_id = '3'
As the other said, the org_id from emp table makes no sense. You must remove it from the table.
if you want all records from the books table try this
Select b.id,c.emp_id,b.status,e.name,e.address
from emp_table e
Left join books_table b
on(e.emp_id=b.emp_id)
where e.org_id='3' and b.org_id='3'
You can use this query this will gives you all book record with particular org_id along with all employee record
SELECT * FROM emp as e1
LEFT JOIN books as b1 ON e1.emp_id = b1.emp_id WHERE e1.org_id = 'YOUR_ID'
UNION ALL
SELECT * FROM emp as e1
RIGHT JOIN books as b1 ON e1.emp_id = b1.emp_id WHERE e1.org_id = 'YOUR_ID'
The following query should work for you:
SELECT b.id, b.status, b.org_id, e.emp_id, e.name, e.address
FROM Books b LEFT JOIN Employee e
ON e.emp_id = b.emp_id
WHERE b.org_id = 100
This would be the query for org 100.
It appears that your current schema is not normalized very well:
Employee: emp_id, name, address, org_id
Books: id, emp_id, status, org_id
The two tables both store the org_id, which presumably means the same thing.
This query might give you the results you want. You might want to learn more about joins in SQL. A LEFT JOIN gives you all records from one table, and matching records from another.
SELECT books.*,
emp.name AS emp_name,
emp.address AS emp_address,
emp.org_id AS emp_org_id
FROM books
LEFT JOIN emp ON books.emp_id = emp.emp_id
WHERE books.org_id=?
you can use this for all recors both tables :
select * from books
inner join emp on
books.emp_id=emp.emp_id
where books.emp_id=emp.emp_id
I would to select some data from mysql. However, some of the data stored in the table I am querying from are in codes and to get the text description I need to reference that data to another table.
TABLE: persons
SELECT id, first_name, last_name, address_code, customer_type_code
FROM persons
WHERE id = 1001
TABLE: ref_address
SELECT address_name FROM ref_address
WHERE address_code = 123
TABLE: ref_customer_type_code
SELECT customer_type_name FROM ref_customer_type_code
WHERE customer_type_code = 456
How can I combine all three queries together to return id, first_name, last_name, address_name, customer_type_name in one query instead of querying them 3 times like this?
Please read the reference manual for join.
In short, you need to define a relation between your tables (I use aliases just to make things a bit "cheaper" to write):
select p.id, p.first_name, p.last_name, p.address_code, p.customer_type_code
, ra.address_name
, rctc.customer_type_name
from persons as p
-- Join the persons table with the ref_address table,
-- using the address_code column of each table
inner join ref_adress as ra
on p.address_code = ra.address_code
-- Join the persons table with the ref_customer_type_code table
-- using the customer_type_code column of each table
inner join ref_customer_type_code as rctc
on p.customer_type_code = rctc.customer_type_code
where p.id = 1001
Notice that when you use multiple tables in a query it may be useful to define aliases to avoid having to write again and again the full name of the table. Also, it may be a good idea to explicitly specify each field's source table (by alias, if you are using it)
What you're looking for is a JOIN.
In a JOIN, you specify two tables and how they are related to one another. In a single SELECT statement, you can have multiple JOIN clauses.
SELECT
p.id, p.first_name, p.last_name, p.address_code, p.customer_type_code,
a.address_name,
t.customer_type_name
FROM
persons p
JOIN ref_address a
ON p.address_code = a.address_code
JOIN ref_customer_type_code t
ON p.customer_type_code = t.customer_type_code
WHERE
p.id = 1001
This query says that the table persons and ref_address should be linked, or "joined", by the related columns address_code which are available in each table. Same goes with the tables persons and ref_customer_type_code being linked by the columns customer_type_code.
I am having 3 tables (c19 , c19b2, g26) in a database
I want to write a SQL Query to search and display all fields of the matched record.
I am using following query:
$query = "SELECT * FROM c19,c19b2,g26 WHERE armyno LIKE '%$searchTerm%'";
But it only works for table c19,
Data from the other 2 tables is not fetched.Each table has a field armyno
Please help me with this
Thank you.
Alright, you are not looking for a JOIN, but a UNION.
SELECT * FROM c19 WHERE armyno LIKE '%$searchTerm%'
UNION
SELECT * FROM c19b2 WHERE armyno LIKE '%$searchTerm%'
UNION
SELECT * FROM g26 WHERE armyno LIKE '%$searchTerm%'
That will let you query all three tables at the same time.
Which DB are you using? This would have worked in SQL Server. However, notice you are doing a cross join of every record to every record... usually you only want to match some records by restriction of a matching key, for example:
select
*
from a
left join b on b.somekey = a.somekey
left join c on c.someotherkey = b.someotherkey
In SQL server you can just say *, but I'm taking it that in your DB engine that didn't work, so try specifying which table. This may in some environments require aliasing as well:
select
a.*,
b.*,
c.*
from tableA as a
left join tableB as b on b.somekey = a.somekey
left join tableC as c on c.someotherkey = b.someotherkey
Generally, you should see the columns from the first table, followed by the columns from the second table, followed by columns from the third table for a given row. If you wanted to get all columns from all tables, but separately, then that would be 3 separate selects.
Lastly, if all 3 tables have "armyno" then I'd expect it to throw an ambiguous field error. In such case you'd want to specify which table's "armyno" field to filter on.
I'm having some trouble figuring out how I should build my database for this project i'm currently working on. Fishing-related.
I'm just not sure how to set up my tables.
Table 1(ID, username, email etc)
Table 2(fish, weight, length etc)
How do i join these two tables? Should I have a column named ID in the 2nd table aswell? Because I need to know which user uploaded what fish. I'm just not sure how to do that.
Any help is appreciated.
Yes you have to, and that is called Relation Databases this is example
Users (UserID, UserName, Password)
Fish (FishID, UserID, FishName, Length, Weight)
and then you connect them using UserID
select u.UserName, f.FishName, f.Length, f.Weight
from Users u
LEFT JOIN Fish f on (f.UserID=u.UserID)
and if you are looking for specific user then just add at the end
WHERE u.UserID=#UserID
Looking at you're table structure I think it's best to change the id name in table 1 to *user_id* and add a column in the second table also named *user_id*. Joining using the columns is then very simple using the following query:
SELECT *
FROM table1
JOIN table2 USING (user_id)
Other possibility would be to add a column named *user_id* (or something else) to table2 and create a query like:
SELECT *
FROM table1
JOIN table2 ON table2.user_id = table1.id
In this case, you set the columns to use for the join in the 'ON .. = ..' structure.