I'm trying to build a query similar to the following, but am unsure if it will work:
UPDATE userbase SET EndDate='today' where Owner='me' OR Owner2='me'
I want to update one value where the person using it could be owner one or two, if that makes any sense.
Thank you!
That looks correct and should work as intended - assuming you have 2 fields, called Owner and Owner2 and want o check that either of them contains 'me'.
If you want to check if the Owner field contains either 'me' or 'me2' you'd do
... WHERE Owner = 'me' OR Owner = 'me2'
Oh and you may want to consider using the NOW() function and similar to set dates/times (In case you're not aware of them).
The statements you wrote looks good, it should be Ok.
For your ref: SQL UPDATE
Related
For one of my courses, I'm trying to create banking system website using mysqldb and to write the code that make it possible for me to update users balance with random value while registration so the balance will not depend on the user's registration inserted information. i want the value to be inserted to the right spot in the table, only if this spot is null.
i used the code below:
$cursor = $MySQLdb->prepare("UPDATE users SET Balance=(Select FLOOR(0+ RAND() * 10000)) WHERE Balance=null AND userID=<userID>;")
I hope I was understood.
Thanks in advance
First of all, I would never put a calculation in a query string ;)
Also don't overcomplicate the rand() function. Take a look on the docs: rand() function docs
And lastly maybe think about it that is it a good idea to leave it on null? Maybe you could do something like 1 or so. (Only if it not possible for someone to have 1 money!!)
Do something like:
$balance_variable = $balance_variable = rand(5000, 10000);
$userID_variable = /*specify it somehow*/;
$cursor = $MySQLdb->prepare("UPDATE users SET Balance=? WHERE Balance IS NULL AND userID=?");
$cursor->bind_param('ss', $balance_variable, $userID_variable);
$cursor->execute();
I want to create a trigger that does the following:
copy one column of info jobnumber from one table (jobs) to another (materials) on an existing record to attachedjobnumber.
I haven't found the correct syntax to say this. when I insert a new job - nothing gets update and no new row is inserted,,, but there are no error messages in the logs.
I also need to set the bool (hasjobnumber) equal to true - when I test that trigger - it works fine.
which makes me think that setting the value of material.attachedjobnumber = jobs.jobnumber is the problem, my guess is that jobs.jobnumber isn't in reference when updating table material...
if that's true - what's the proper syntax for this?
I've tested separate triggers, and so far this trigger works fine.
UPDATE material
SET isjobyet = "HAS"
WHERE barcode1 IN (
SELECT primaryRFID
FROM jobs
WHERE jobs.primaryRFID = material.barcode1
)
since this code does work - I make the assumption that the non-static JobNumber value is the source of the problem. since "HAS" is correctly updated.
UPDATE material
SET material.AttachedJobNumber = jobs.JobNumber
WHERE barcode1 IN (
SELECT primaryRFID
FROM jobs
WHERE jobs.primaryRFID = material.barcode1
)
from this - I expect that after each inserts on the table jobs:
jobs.JobNumber be assigned to the material.AttachedJobName
this updates only the material row where the material.barcode1 =jobs.primaryrfid.
but no new row is inserted at all.
Before you perform UPDATE,
Actually you can use the same script using SELECT [skip the UPDATE SYNTAX]
That way you can monitor your script without committing anything yet.
And also I dont recommend using this inside the subquery
WHERE jobs.primaryRFID = material.barcode1
This condition connecting a table works on IN-SELECT subquery.
If you are performing subqueries inside the [WHERE] clause, try to treat it as different buffer, dont connect them first.
I have an imported table of several thousand customers, the development I am working on runs on the basis of anonymity for purchase checkouts (customers do not need to log in to check out), but if enough of their details match the database record then do a soft match and email the (probably new) email address and eventually associate the anonymous checkout with the account record on file.
This is rolling out this way due to the age of the records, many people have the same postal address or names but not the same email address, likewise some people will have moved house and some people will have changed name (marriage etc).
What I think I am looking for is a MySQL CASE system, however the CASE questions on Stack Overflow I've found don't appear to cover what I'm trying to get from this query.
The query should work something like this:
$input[0] = postcode (zip code)
$input[1] = postal address
$input[2] = phone number
$input[3] = surname
$input[4] = forename
SELECT account_id FROM account WHERE <4 or more of the variables listed match the same row>
The only way I KNOW I can do this is with a massive bunch of OR statements but that's excessive and I'm sure there's a cleaner more concise method.
I also apologise in advance if this is relatively easy but I don't [think I] know the keyword to research constructing this. As I say, CASE is my best guess.
I'm having trouble working out how to manipulate CASE to fit what I'm trying to do. I do not need to return the values only the account_id from the valid row (only) that matches 4 or 5 of the given inputs.
I imagine that I could construct a layout that does this:
SELECT account_id CASE <if postcode_column=postcode_var> X=X+1
CASE <if surname_column=surname_var> X=X+1
...
...
WHERE X > 3
Is CASE the right idea?
If not, What is the process I need to use to achieve the desired results?
What is [another] MySQL keyword / syntax I need to research, if not CASE.
Here is your pseudo query:
SELECT account_id
FROM account
WHERE (postcode = 'pc')+
(postal_address = 'pa')+
(phone_number = '12345678901')+
(surname = 'sn')+
(forename= 'fn') > 3
I make a query (with \yii\db\ActiveQuery) with joins, and some fields in "where" clause become ambigous. Is there a nice and short way to specify the name of the current model`s (ActiveRecord) table (from which one the ActiveQuery was instantiated) before the column name? So I can use this all the time in all cases and to make it short.
Don't like doing smth like this all the time (especially in places where there're no joins, but just to be able to use those methods with joins if it will be needed):
// in the ActiveQuery method initialized from the model with tableName "company"
$this->andWhere(['{{%company}}.`company_id`' => $id]);
To make the "named scopes" to work for some cases with joins..
Also, what does the [[..]] mean in this case, like:
$this->andWhere(['[[company_id]]' => $id]);
Doesn't seem to work like to solve the problem described above.
Thx in advance!
P.S. sorry, don't have enough reputation to create tag yii2-active-query
to get real table name :
Class :
ModelName::getTableSchema()->fullName
Object :
$model::getTableSchema()->fullName
Your problem is a very common one and happens most often with fields liek description, notes and the like.
Solution
Instead of
$this->andWhere(['description'=>$desc]);
you simply write
$this->andWhere(['mytable.description'=>$desc]);
Done! Simply add the table name in front of the field. Both the table name and the field name will be automatically quoted when the raw SQL is created.
Pitfall
The above example solves your problem within query classes. One I struggled over and took me quite some time to solve was a models relations! If you join in other tables during your queries (more than just one) you could also run into this problem because your relation-methods within the model are not qualified.
Example: If you have three tables: student, class, and teacher. Student and teacher probably are in relation with class and both have a FK-field class_id. Now if you go from student via class to teacher ($student->class->teacher). You also get the ambigous-error. The problem here is that you should also qualify your relation definitions within the models!
public function getTeacher()
{
return $this->hasOne(Teacher::className(), ['teacher.id' => 'class.teacher_id']);
}
Proposal
When developing your models and query-classes always fully qualify the fields. You will never ever run into this problem again...that was my experience at least! I actually created my own model-gii-template. So this gets solved automatically now ;)
Hope it helped!
Hey there I am trying to learn SQL by trying to complete online questions and I'm trying to create a view.
I have created a SELECT query that works and now trying to turn it into a view, though when following the online instructions and enter the script that should create a view I come up with the duplicate field error.
I've looked into it and it may be "doctor.fullname" as a duplicate field but this is from another table. Andway I have deleted and still tried it but the error still appears.
I know there is probably an easy solution and sorry to bother you with this but it will be must appreciated.
CREATE VIEW patient_registration_form
AS
SELECT
patient.patient_id,
patient.nok_no,
patient.f_name,
patient.s_name,
patient.sex,
patient.dob,
patient.marital_status,
patient.date_registered,
nok.tel_no,
nok.full_name,
nok.address,
nok.relationship,
doctor.doctor_id,
doctor.clinic_no,
doctor.full_name,
doctor.address
FROM doctor, patient, nok
WHERE doctor.doctor_id = patient.doctor_id
AND nok.nok_no = patient.nok_no;
You're returning several columns with the same name... full_name and address... even though they're from different tables. In this case, you have to give them different aliases:
SELECT
patient.patient_id,
patient.nok_no,
patient.f_name,
patient.s_name,
patient.sex,
patient.dob,
patient.marital_status,
patient.date_registered,
nok.tel_no,
nok.full_name as nok_full_name,
nok.address as nok_address,
nok.relationship,
doctor.doctor_id,
doctor.clinic_no,
doctor.full_name as doctor_full_name,
doctor.address as doctor_address
You have two full_name listed... one for nok.full_name and one for doctor.full_name. One needs to be renamed such as nok.full_name as nok_full_name.