Basically I want to query a database and modify the values of one column based on the contents of another.
Here's my idea of how it would work:
IF Column 'Town' IS NOT NULL then Column 'Sign-up type' = 1 else = 0
The logic is, i've added a new column into the DB that will store whether a quick or full sign up has been made.
Quick = 0, Full = 1. Default is 0 = Quick.
I've managed to implement the change on the two registration forms that feed the DB, but I need to append the historical data to backwards fill the data.
Because the quick sign up only collects name, and email, those entries do not contain data in the 'Town' field which is a required field in a full sign up.
So i'm using that as a reference point to select all the entries that DO have (NOT NULL?) data in order to enter '1' (representing 'Full') into 'Signup Type' column.
I hope I'm making sense! I only have a basic understanding of MySQL but I'm willing to learn, it's sometimes hard trying to explain what I want to do when I'm unclear of the correct jargon!!
UPDATE yourTable SET signupType = IF(Town IS NULL, 1, 0);
Note this will update all data, you may want to limit this to historical data (by the sounds of things this should be fine however).
Related
I have a jsonb column to which I will add data all at one time, or add data incrementally at various points in time or update existing name-value pairs.
One such case is explained below. Let me know how to app the second user_profile after the first is added. I am not sure if the user_profile format itself needs to be modified. I tried inserting 2 profiles in a single insert and was able to retrieve data according to my needs. So I believe the design format of JSON is ok.
create table myjsontab (jsonb_details jsonb);
insert first profile_type data:
insert into myjsontab(jsonb_details)
values (
'{"user_profile":{
"customer":{
"profile_name":"customer",
"user_status":"NEW","user_state":"pending",
"s3url":["file1","abc/1/clients/51/clients/acmepmwallet1/"]
}
}}'
);
----------------- works.
Insert two profile_type data in one insert
insert into myjsontab(jsonb_details)
values (
'{"user_profile":{
"customer":{
"profile_name":"customer",
"user_status":"NEW","user_state":"pending",
"s3url":["file1","abc/1/clients/51/clients/acmepm1/"]
},
"admin staff":{
"profile_name":"admin staff",
"user_status":"NEW","user_state":"admin upload",
"s3url":"abc/"
}
}}'
);
----------------- also works.
but I am looking to see how I can insert the second profile ("admin staff") set as an "update" or "addition at a later time".
If I try update <table_name> set json_details= json_details|| 'new dataset' there are many issues with formatting the data. I think this approach is wrong.
I am not sure if jsonb_set is a good option to use.
update users set user_details=jsonb_set_lax(user_details->'user_profile','{user_profile,2}','{
"profile_name":"corporate staff",
}',true)
This seems to have worked to solve my issue. Posting this if someone comes here looking for similar answers...
The point to note is the '{user_profile,2}' index. Since I have 2 items in my array, I have to "INSERT" this as the 3rd item which in array parlance is position 2. Since arrays start from 0.
So in your case, you have to find the jsonb_array_length and use that index number as the entry point.
I have recently started managing an Access DB used for reporting. Currently a single row has a 'status' that can be one of many options selected by a dropdown field. When reporting, each of these ~15 statuses rolls up to one of 5 'rollup statuses' which is currently translated via an Excel interface. I would like to add a column to the database table that automatically populates the correct 'rollup status' based on the selected 'status'. I do not know if this is a calculated field, a lookup, etc. as I have very minimal Access knowledge.
For example:
[Status]---->[Rollup Status]
To Be Scheduled----> Planning
TBD---->Planning
Scheduled---->Scheduled
DMM Pending---->Scheduled
EEP Created---->Scheduled
Cleanup Pending---->Complete
Complete---->Complete
If i understand your question correctly perhaps this would work...
In design mode: Add the new column to your table (which i will call 'total') where you want the 'rollup statuses' and call it something like 'rollup_status'
In SQL Query mode:
UPDATE total
SET rollup_status = '1'
WHERE [status] = '2';
4150
NRrows = RSNonResourceCosts.RecordCount ' Number of Rows in Non Resource Table
NRCols = RSNonResourceCosts.Fields.Count ' Number of Fields in NonResource Table
Dim CL(1 To 10) As Integer ' This is to count "filled rows" when spreadsheet is filled
Dim Header(1 To 10) As String
'-----------
'Find the Headers (Taken from Actual Table and not predefined as original)
For Each Recordsetfieldx In RSNonResourceCosts.Fields
If C > 0 Then
Header(C) = Recordsetfieldx.Name
End If
C = C + 1
Next Recordsetfieldx
4170
R = 0
'Write to worksheet
RSNonResourceCosts.MoveFirst
Do Until RSNonResourceCosts.EOF
For C = 1 To NRCols - 1
FieldName = RSNonResourceCosts.Fields(C).Value
If RSNonResourceCosts.Fields(Header(C)).Value <> "" Then
CL(C) = CL(C) + 1
WKS.Cells(200 + R, C) = RSNonResourceCosts.Fields(Header(C)).Value
End If
Next C
RSNonResourceCosts.MoveNext
R = R + 1
Loop
I attach code. Have solved part of original by defining Recordset. User can add column to Table. First part of code determines the headers. Second part determines values and writes to worksheet. The new Rows are appearing first on the worksheet and in wrong column. I tried attaching worksheet but it looked awful. Any help would be appreciated.
Two things:
1) The order your records is the order they are in the recordset. If you want them in a particular order, try sorting them (perhaps with an ORDER BY in the underlying SQL statement)
2) For the column issue: In the first bit of code, I don't see where C is initialized, but keep in mind the Headers and Fields both start with an index of 0, so if you set Header(1) = the first field's header (index 0), but then copy the data in the fields without shifting the index value, it will shift everything over by one column.
As an added note, you might want to consider what happens when you have more than 10 columns. Using fixed-length arrays means your code will break. You might want to read about using a dynamic array and ReDim.
I don't yet feel like I have completely grasped the entirety of the problem yet, but let me take a stab at it. From what I do understand, data is being written from your record set into excel (good), but it is going into the 'wrong row' (question title) and the 'wrong column' (question text).
From what I see, I don't know the purpose of FieldName = RSNonResourceCosts.Fields(C).Value, but I want to make sure that you understand that RSNonResourceCosts.Fields(C).Value is not necessarily equivalent to RSNonResourceCosts.Fields(Header(C)).Value. More than that, you are likely missing at least one column altogether in your output, or at least skipping over it accidentally. rs.Fields(0).name is the first 'column' in a recordset, but it is completely ignored in your code. Perhaps this is intentional, maybe it is a key field or something useless to you, but it is important that you are making that distinction intentionally. But, since I don't see where your code populates the headers in your worksheet, I wonder if 'wrong column' means every record has been shifted a column and your last column is sitting empty. That, coupled with the dubious omission of C being initialized as 0 (not 1, or anything else) in your above code, makes me concerned that Header(3) could possibly by field(1), or field(4), or I don't know. That would certainly also confuse the columns in your output, or at least make dependence on FieldName frustrating.
Another thing, really a shot in the dark: NRrows. I have had issues before, depending on how I create my recordset, of not getting the correct record count the first time. And, if I base the population of a worksheet, array, etc., on the number of rows and the records relative position in that number, my records get all sorts of wacky. Maybe you did this already, but since it isn't shown, I recommend a RSNonResourceCosts.movelast: RSNonResourceCosts.movefirst line before you define NRrows, just to be sure.
And last, if I am way off base here... then you really are going to have to show us the spreadsheet, even if it isn't your most beautiful work. We all know that if it were, you wouldn't be asking about it here... so set your pride aside, and be more specific as well as show us what the output looks like and how it should look.
I’ve got a problem selecting some things in my database.
I’ve got 1 database with a lot of tables, however I only use 2 with this specific task.
I have a Clothing table, and I need to import this in my new database. I have succesfully transferred a lot of data, but now I need to take 1 final small step into completing this. In my Clothing table I have a column called Youtube link, here I have a link with an Youtube link, this specific link, in this specific column, I want to append that to another table I have in the database, let’s call it new_clothing_table. I there have a description column called prod_desc and I want to append the Youtube link to that column.
But there is also another “problem”, it’s not that every product has a Youtube link, so things have to be filtered in order to not fuck things royally up. A advantage I have, I have in both tables a product_name, and these are all the same. So I want to transfer that specific Youtube link if it’s there (sometimes there is a 0 filled in or nothing, but I dont think it’s NULL because if I make a SELECT query where Youtube_link is null I get zero rows..)
So can someone help me out>?
mysql has an update-join construct you can use:
UPDATE new_clothing_table nct
JOIN clothing c ON c.product_name = nct.product_name AND
c.youtube_link != '0'
SET nct.description = CONCAT(nct.description, c.youtube_link)
EDIT:
To make sure this does what you want, you could first select the updated content in order to examine it:
SELECT nct.description AS old_description,
CONCAT(nct.description, c.youtube_link) AS new_description
FROM new_clothing_table nct
JOIN clothing c ON c.product_name = nct.product_name AND
c.youtube_link != '0'
This is more of a theory question. I have a page with a bunch of various textfields, dropdown boxes, etc. Each user has his/her "own page" that can be updated via this update page that I am referring to. He updates the fields at his choosing. It passes about 30 variables (if every field is inputted) to a "preview page". If the person likes the preview page, then they click an "update" button at the bottom of the preview page and all the various variables are updated into the appropriate MySQL table and their "own page" that others see is updated dynamically. (let me know if this explanation isn't clear).
Inserting this information for the first time is easy. However, when a user wants to update only a few of the fields for his page later, this is where I am confused. How do I make the MySQL update query dynamic to recognize an update to ONLY the fields on the page that the user wants to update (while he leaves the other fields blank, thus leaving the old information intact for those columns, and they are disregarded in the update query).
Let me know if what I'm asking doesn't make sense and I'll try again.
Thanks for your help.
The easiest way to do this would be
UPDATE MyTable m SET m.f1 = COALESCE(input1,m.f1), m.f2 = COALESCE(input2,m.f2), ....
WHERE m.id = key;
The COALESCE will return the first non-null value (or null if all values are null).
Note that you can insert a default value after the existing field value if you want to force a default.
Like so:
UPDATE MyTable m SET m.f1 = COALESCE(input1,m.f1,default1), m.f2 = COALESCE(input2,m.f2,default2), ....
WHERE m.id = key;
See: MySQL: how to use COALESCE
http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html#function_coalesce