I have a dictionary containing the original word, and altforms of the word. What I have currently is something like this:
|---------------------|---------------------|------------------|
| WordID | Word | OrigWord |
|---------------------|---------------------|------------------|
| 1 | aah | null |
|---------------------|---------------------|------------------|
| 2 | aahs | aah |
|---------------------|---------------------|------------------|
| 3 | aahed | aah |
|---------------------|---------------------|------------------|
| 4 | aahing | aah |
|---------------------|---------------------|------------------|
I have around 270,000 words in the dictionary with a similar layout to this.
Is there a fairly simple way to create an ID for each inflected form that links back to the original word similar to below?
|---------------------|---------------------|---------------------|------------------|
| WordID | LinkID | Word | OrigWord |
|---------------------|---------------------|---------------------|------------------|
| 1 | null | aah | null |
|---------------------|---------------------|---------------------|------------------|
| 2 | 1 | aahs | aah |
|---------------------|---------------------|---------------------|------------------|
| 3 | 1 | aahed | aah |
|---------------------|---------------------|---------------------|------------------|
| 4 | 1 | aahing | aah |
|---------------------|---------------------|---------------------|------------------|
| 5 | null | aardvark | null |
|---------------------|---------------------|---------------------|------------------|
| 6 | 5 | aardvarks | aardvark |
|---------------------|---------------------|---------------------|------------------|
EDIT:
Added second example word to further explain LinkID functionality
This can be achieved by a self join:
SELECT t1.WordID,
t2.WordID as LinkID,
t1.Word,
t1.OrigWord
FROM Words t1 LEFT JOIN Words t2 ON t1.OrigWord = t2.Word
Related
I am trying to understand how to pivot data within T-SQL but can't seem to get it working. I have the following table structure
+-------------------+-----------------------+
| Name | Value |
+-------------------+-----------------------+
| TaskId | 12417 |
| TaskUid | XX00044497 |
| TaskDefId | 23 |
| TaskStatusId | 4 |
| Notes | |
| TaskActivityIndex | 0 |
| ModifiedBy | Orange |
| Modified | /Date(1554540200000)/ |
| CreatedBy | Apple |
| Created | /Date(2121212100000)/ |
| TaskPriorityId | 40 |
| OId | 2 |
+-------------------+-----------------------+
I want to pivot the name column to be columns expected output
+--------+------------------------+-----------+--------------+-------+-------------------+------------+-----------------------+-----------+-----------------------+----------------+-----+
| TASKID | TASKUID | TASKDEFID | TASKSTATUSID | NOTES | TASKACTIVITYINDEX | MODIFIEDBY | MODIFIED | CREATEDBY | CREATED | TASKPRIORITYID | OID |
+--------+------------------------+-----------+--------------+-------+-------------------+------------+-----------------------+-----------+-----------------------+----------------+-----+
| | | | | | | | | | | | |
| 12417 | XX00044497 | 23 | 4 | | 0 | Orange | /Date(1554540200000)/ | Apple | /Date(2121212100000)/ | 40 | 2 |
+--------+------------------------+-----------+--------------+-------+-------------------+------------+-----------------------+-----------+-----------------------+----------------+-----+
Is there an easy way of doing it? The columns are fixed (not dynamic).
Any help appreciated
Try this:
select * from yourtable
pivot
(
min(value)
for Name in ([TaskID],[TaskUID],[TaskDefID]......)
) as pivotable
You can also use case statements.
You must use the aggregate function in the pivot table.
If you want to learn more, here is the reference:
https://learn.microsoft.com/en-us/sql/t-sql/queries/from-using-pivot-and-unpivot?view=sql-server-2017
Output (I only tried three columns):
DB<>Fiddle
I have a table "Listing" that looks like this:
| listing_id | amenities |
|------------|--------------------------------------------------|
| 5629709 | {"Air conditioning",Heating, Essentials,Shampoo} |
| 4156372 | {"Wireless Internet",Kitchen,"Pets allowed"} |
And another table "Amenity" like this:
| amenity_id | amenities |
|------------|--------------------------------------------------|
| 1 | Air conditioning |
| 2 | Kitchen |
| 3 | Heating |
Is there a way to join the two tables in a new one "Listing_Amenity" like this:
| listing_id | amenities |
|------------|-----------|
| 5629709 | 1 |
| 5629709 | 3 |
| 4156372 | 2 |
You could use unnest:
CREATE TABLE Listing_Amenity
AS
SELECT l.listing_id, a.amenity_id
FROM Listing l
, unnest(l.ammenities) sub(elem)
JOIN Amenity a
ON a.ammenities = sub.elem;
db<>fiddle demo
I am a novice self-teaching Microsoft Access.
I have an MS Access database with a table of students (Table1).
Table1
+----+-----------+----------+------------+------------+
| id | firstname | lastname | Year_Group | Form_Group |
+----+-----------+----------+------------+------------+
| 2 | mnb | nbgfv | 7 | 1 |
| 3 | jhg | uhgf | 8 | 2 |
| 4 | poi | ijuy | 9 | 2 |
| 5 | tgf | tgfd | 10 | 2 |
| 6 | wer | qwes | 11 | 2 |
+----+-----------+----------+------------+------------+
Every day students days are recorded sort of like Table2.
Table2
+----------+----+-----------+----------+------------+--------+-----------+----------+
| Date | id | firstname | lastname | Year_Group | Effort | Behaviour | Homework |
+----------+----+-----------+----------+------------+--------+-----------+----------+
| 28/02/19 | 2 | mnb | nbgfv | 7 | Good | Good | Y |
| 28/02/19 | 3 | jhg | uhgf | 8 | OK | OK | Y |
| 28/02/19 | 4 | poi | ijuy | 9 | Bad | Bad | N |
| 01/03/19 | 5 | tgf | tgfd | 10 | Good | OK | Y |
| 01/03/19 | 6 | wer | qwes | 11 | Good | Good | Y |
+----------+----+-----------+----------+------------+--------+-----------+----------+
Is there a way (when using a list box or combo box) to select a student from Table1 so that their information is used for the corresponding columns in Table2?
Or is there a more efficient way to do this?
Firstly, you should normalise your data.
Currently, you are repeating the firstname, lastname, and Year_Group data in two separate tables, which not only bloats your database, but also means that such data must be maintained in two separate places, potentially leading to inconsistencies and then uncertainty as to which is the master.
Instead, I would suggest that your Students table should contain all information pertaining to the characteristics of a student:
Students
+----+-----------+----------+------------+------------+
| id | firstname | lastname | Year_Group | Form_Group |
+----+-----------+----------+------------+------------+
| 2 | mnb | nbgfv | 7 | 1 |
| 3 | jhg | uhgf | 8 | 2 |
| 4 | poi | ijuy | 9 | 2 |
| 5 | tgf | tgfd | 10 | 2 |
| 6 | wer | qwes | 11 | 2 |
+----+-----------+----------+------------+------------+
And the information pertaining to each school day should only reference the student ID in the Students table:
SchoolDays
+----------+----+--------+-----------+----------+
| Date | id | Effort | Behaviour | Homework |
+----------+----+--------+-----------+----------+
| 28/02/19 | 2 | Good | Good | Y |
| 28/02/19 | 3 | OK | OK | Y |
| 28/02/19 | 4 | Bad | Bad | N |
| 01/03/19 | 5 | Good | OK | Y |
| 01/03/19 | 6 | Good | Good | Y |
+----------+----+--------+-----------+----------+
Then, if you want to display the data in its entirety, you would use a query which joins the two tables, e.g.:
select
t2.date,
t1.firstname,
t1.lastname,
t1.year_group,
t2.effort,
t2.behaviour,
t2.homework
from
students t1 inner join schooldays t2 on t1.id = t2.id
I have one table:
| id | head1| head2 | head3|
| 1 | fv1 | fw1,fw2,fw3| fv3 |
| 2 | sv2 | sw1,sw2,sw3| sv4 |
And would like to have the following:
| id | head2 |
| 1 | fw1 |
| 1 | fw2 |
| 1 | fw3 |
| 2 | sw1 |
| 2 | sw2 |
| 2 | sw3 |
So I would like to split a comma-delimited content of some columns and then copy it over into the different table as rows for search purposes.
Which Talend component should I use to achieve this? Is that possible?
tNormalize should help you with this problem.
Just select "," as field separator, and head2 as the column to normalize.
For example I have a table called product_list, which holds a list of products:
+----+-------+-----------+-------------+--+
| id | name | weight(g) | type | |
+----+-------+-----------+-------------+--+
| 1 | Shirt | 157 | Clothes | |
+----+-------+-----------+-------------+--+
| 2 | Ring | 53 | Accessories | |
+----+-------+-----------+-------------+--+
| 3 | Pants | 202 | Clothes | |
+----+-------+-----------+-------------+--+
and a table called product_price:
+----------+----+-------+--------+--+
| price_id | id | name | price | |
+----------+----+-------+--------+--+
| 1 | 1 | Shirt | 99.00 | |
+----------+----+-------+--------+--+
| 2 | 2 | Ring | 149.00 | |
+----------+----+-------+--------+--+
| 3 | 3 | Pants | 119.00 | |
+----------+----+-------+--------+--+
If I insert 1 row of data into product_list, part of the data (such as product_id & product name) should also be inserted in another table like product_price which holds the price for all products (new products would have 0 or NULL values for their price). Eg:
product_list:
+----+--------+-----------+-------------+--+
| id | name | weight(g) | type | |
+----+--------+-----------+-------------+--+
| 1 | Shirt | 157 | Clothes | |
+----+--------+-----------+-------------+--+
| 2 | Ring | 53 | Accessories | |
+----+--------+-----------+-------------+--+
| 3 | Pants | 202 | Clothes | |
+----+--------+-----------+-------------+--+
| 4 | Shirt2 | 175 | Clothes | |
+----+--------+-----------+-------------+--+
product_price:
+----------+----+-------+--------+--+
| price_id | id | name | price | |
+----------+----+-------+--------+--+
| 1 | 1 | Shirt | 99.00 | |
+----------+----+-------+--------+--+
| 2 | 2 | Ring | 149.00 | |
+----------+----+-------+--------+--+
| 3 | 3 | Pants | 119.00 | |
+----------+----+-------+--------+--+
| 4 | 4 | Shirt2| 0.00 | |
+----------+----+-------+--------+--+
My question here is the method in approaching this. What is the proper way (in a professional manner) would an experienced person approach this matter?
These are 2 approaches I have in mind:
1 - Using triggers to insert into the other tables like product_price,etc whenever I insert a product data into product_list
2 - Using a function (stored procedure) like product_add to add a new product into each tables.
Which method is better? Or if there a better suggestion, then I'd like to know about it. Thanks in advance.
TLDR: Should I use Triggers or instead use Stored Procedures, which is better? Or you have a better suggestion?
In Postgres, you can use CTEs:
with pl as (
insert into product_list(name, weight, type)
select . . .
returning *
)
insert into product_price(id, price)
select id, NULL
from pl;
Note: You shouldn't repeat the name column in the product_list and product_price table. It should only be in the list table.