My issue with an old customer plus outdated system.Part of issue. The 3 tables contain existing data in database. Let me explain, what was the scenario and then I hope you guys can help me get this job done.
Scenario :
There were a lot of Product, especially ProductZone, as you might imagine...
Customer add new Zone(let’s assume new Zone U,V,W,X,Y,Z),unfortunately did not for ProductZone!
Costomer need to update(insert) ProductZones to make all existing Products refer with new Zones and some older Zones(let’s assume older Zone R,S,T) if it didn't exist,here I came across...,need your help!
Explanation :
If i understand correctly i have to massive insert ProductZone and in this case by complicate T-SQL both filter condition and insert statement.
I'd be glad to take any suggestions,Thanks in advance.
This query will populate the Zones for existing products available in ProductZone Table and the new products available in Product table.
INSERT INTO ProductZone
SELECT ZoneNo,
ProductNo
FROM Product a
CROSS JOIN ZONE b
WHERE NOT EXISTS (SELECT 1
FROM ProductZone c
WHERE a.ProductNo = c.ProductNo
AND a.zone = c.zone)
Related
I currently have three tables.
master_tradesmen
trades
master_tradesmen_trades (joins the previous two together in a many-to-many relationship). The 'trade_id' and 'master_tradesman_id' are the foreign keys.
Here is what I need to happen. A user performs a search and types in a trade. I need a query that displays all of the information from the master_tradesmen table whose trade in the master_tradesmen_trade table matches the search. For example, if 'plumbing' is typed in the search bar (trade_id 1), all of the columns for Steve Albertsen (master_tradesman_id 6) and Brian Terry (master_tradesman_id 8) would be displayed from the master_tradesmen table. As a beginner to SQL, trying to grasp the logic of this is about to make my head explode. I'm hoping that someone with more advanced SQL knowledge can wrap their head around this much easier than I can. Note: the 'trades' column in master_tradesmen is for display purposes only, not for querying. Thank you so much in advance!
You have a catalog for the tradesmen, & another catalog for the trades.
The trades should only appear once in the trades catalog in order to make your DB more consistent
Then you have your many-to-many table which connects the trades & master tradesmen tables.
If we want to get the tradesmen according to the given trade in the input, we should first
know the id of that trade which has to be unique, so in your DB you would have something
like the img. below :
Now we can make a query to select the id of trade :
DECLARE #id_trade int = SELECT trade_id FROM trades WHERE trade_name LIKE '%plumbing%'
Once we know the trading id, we can redirect to the 'master_tradesmen_trades' table to know the name of the people how work that trade :
SELECT * FROM master_tradesmen_trades WHERE trade_id = #id_trade
You will get the following result :
You may say, 'But there is still something wrong with it, as i am still not able to see the tradesmen', this is the moment when we make an inner join:
SELECT * FROM master_tradesmen_trades trades_and_tradesmen
INNER JOIN master_tradesman tradesmen
ON tradesmen.id = trades_and_tradesmen.master_tradesmen_id
WHERE trade_id = #id_trade
IF you need to see specific columns, you can do :
SELECT first_name, last_name, city, state FROM master_tradesmen_trades trades_and_tradesmen
INNER JOIN master_tradesman tradesmen
ON tradesmen.id = trades_and_tradesmen.master_tradesmen_id
WHERE trade_id = #id_trade
I have recently started learning SQL but can't seem to get my head around creating SQL statements that form relevant results from multiple tables/relations.
Given the following schema:
Account(accNumber, balance, type)
Branch(BSB, phone, streetAddress, town)
registered(accNumber*, BSB*)
I am trying to formulate some outputs:
List all the accNumber registered with a specific BSB (123) and show its listed town (Sydney).
I have tried the following statement for the first query:
SELECT accNumber, BSB, town
FROM ACCOUNT, BRANCH
WHERE BSB = 123;
However, I get every account listed even if they don't belong to the BSB, so I tried:
SELECT accNumber, BSB, town
FROM ACCOUNT, BRANCH
WHERE BSB = 123
AND Town = 'Sydney'
AND account.accNumber=registered.accNumber
AND branch.bsb=registered.bsb;
This time I get column ambiguously defined because they have the same name in the "registered" table.
I've tried making alias in the select statment i.e. accNumber AS ACCOUNT_NUMBER etc, but still getting ambiguously defined errors.
I tried just listing what was in the registered table but then I do not get the town name, just the accNumber and the BSB passed in as a foreign key.
I can't seem to understand how to pull data from other tables and display them correctly and would greatly appreciate any advice!
This might help you start.
SELECT a.ccNumber, b.BSB, c.town
FROM ACCOUNT as a
inner join registered as b on b.accNumber=a.accNumber
inner join BRANCH as c on c.bsb = b.bsb
WHERE b.BSB = 123
AND c.Town = 'Sydney'
So this sounds like a generic SQL question. For your query here is what you're looking at:
select a.account_number
from account a, brance b, registered r
where a.account_number = r.account_number and
a.bsb = b.bsb and
b.bsb = 123;
This will get you all account numbers from the account table that are in BSB 123. When you have multiple tables that have the same column, you need to tell Oracle (and any database for that matter) which "account_number" column you're referring to (as otherwise it's ambiguous as there are multiple tables that contain the column account_number).
SQL is about tables and joins. You sometimes have to join several tables to get what you need, as above. If you don't join tables, as you did originally, you'll get a "cross product", which is not what you want.
I know this is very "light", but hopefully from the above answer to your question, you'll get some idea of how to do this.
I'd be happy to help you more if you have questions. Everyone is new to SQL at some point. Don't feel bad about that. It takes practice and then it becomes much easier.
-Jim
Good morning/afternoon! I was hoping someone could help me out with something that probably should be very simple.
Admittedly, I’m not the strongest SQL query designer. That said, I’ve spent a couple hours beating my head against my keyboard trying to get a seemingly simple three way join working.
NOTE: I'm querying a Vertica DB.
Here is my query:
SELECT A.CaseOriginalProductNumber, A.CaseCreatedDate, A.CaseNumber, B.BU2_Key as BusinessUnit, C.product_number_desc as ModelNumber
FROM pps_sfdc.v_Case A
INNER JOIN reference_data.DIM_PRODUCT_LINE_HIERARCHY B
ON B.PL_Key = A.CaseOriginalProductLine
INNER JOIN reference_data.DIM_PRODUCT C
ON C.product_line_code = A.CaseOriginalProductLine
WHERE B.BU2_Key = 'XWT'
LIMIT 20
I have a view (v_Case) that I’m trying to join to two other tables so I can lookup a value from each of them. The above query returns identical data on everything EXCEPT the last column (see below). It's like it's iterating through the last column to pull out the unique entries, sort of like a "GROUP BY" clause. What SHOULD be happening is that I get unique rows with specific "BusinessUnit" and "ModelNumber" for that record.
DUMEPRINT 5/2/2014 8:56:27 AM 3002845327 JJT Product 1
DUMEPRINT 5/2/2014 8:56:27 AM 3002845327 JJT Product 2
DUMEPRINT 5/2/2014 8:56:27 AM 3002845327 JJT Product 3
DUMEPRINT 5/2/2014 8:56:27 AM 3002845327 JJT Product 4
I modeled my solution after this post:
How to deal with multiple lookup tables for beginners of SQL?
What am I doing wrong?
Thank you for any help you can provide.
Data issue. General rule in trouble shooting these is the column that is distinct (in this case C.product_number_desc as ModelNumber) for each record is generally where the issue is going to be...and why I pointed you towards dim_product.
If you receive duplicates, this query below will help identify if this table is giving you the issues. Remember key in this statement can be multiple fields...whatever you are joining the table on:
Select key,count(1) from table group by key having count(1)>1
Other options for the future...don't assume it's your code, duplicates like this almost always point towards dirty data (other option is you are causing cross joins because keys are not correct). If you comment out the 'c' table and the column referred to in the select clause, you would have received one row...hence your dupes were coming from the 'c' table here.
Good luck with it
New SQL dev here. I'm writing a call log application for our Asterisk server. In one table (CDRLogs), I have the call logs from the phone system (src, dst, calldate, duration). In another table I have (Employees) I have empName, empExt, extStartDate extEndDate). I want to join the two together on src and empExt based on who was using a particular ext on the date of the call. One user per extension in a given time frame.
For example, we have had 3 different users sitting at x100 during the month of July. In the Employees table, I have recorded the dates each of these people started and ended their use of that ext. How do I get the join to reflect that?
Thanks in advance
Perhaps something like:
SELECT A.*, B.*
FROM CDRLOGS A
INNER JOIN Employees B
ON A.SRC = B.EmpExt
AND A.CallDate between B.extStartDate and coalesce(B.extEndDate,getdate())
Please replace the * with relevant fields needed
and there may be a better way as a join on a between seems like it would possibly cause some overhead, but I can't think of a better way presently.
I need to find the sum of the prices of a number of products, however the prices are stored in a different table to products that need pricing.
But, there is a catch, it needs to select these items based on criteria from a third table too.
So, I need the sum of the price of all products in Table 1 where CutID in Table 2 = 001.
Table 1 and Table 2 are linked on SCID, one to many respectively.
If this makes no sense tell me and I will try to clarify?
Thanks,
Bob P
Based on your question, I don't think there's a need for VBA. Excel formulas should be sufficient.
Add a few columns to your primary table. In these columns, use vlookup() to get all your information in one place, including the criteria.
If you only need to sum based on one criteria, use sumif(). If there's multiple criteria, use sumproduct().
Generally, with Access, I initially try to work with something as close a possible to a standard SQL query for ease of maintenance and portability. This ran for me in Access 2010:
SELECT Products.ProductID, Sum(Prices.Price) AS PriceSum
FROM Prices INNER JOIN (Critera INNER JOIN Products ON Critera.SCID = Products.SCID) ON Prices.ProductID = Products.ProductID
WHERE Critera.CutID="001"
GROUP BY Products.ProductID;
Please let us know if that works with your data (I'm not sure of your column names, either).