PostgreSQL Order by first 3 letter of field string - postgresql

I have a column table like this in my table PostgreSQL database
| Product|
|--------|
| A10A |
| A13 |
| A12B |
and i want to order it by the first like this:
| Product|
|--------|
| A10A |
| A12B |
| A13 |
If i use the normal order by im not getting the exact same result that i want

Related

T-SQL : Pivot table without aggregate

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

PostgreSQL - How to do a Loop on a column

I am struggling to do a loop on a Postgres, but functions on postgres are not my piece of cake.
I have the following table on postgres:
| portfolio_1 | total_risk |
|----------------|------------|
| Top 10 Bets | |
| AAPL34 | 2,06699 |
| DISB34 | 1,712684 |
| PETR4 | 0,753324 |
| PETR3 | 0,087767 |
| VALE3 | 0,086346 |
| LREN3 | 0,055108 |
| AMZO34 | 0,0 |
| Bottom 10 Bets | |
| AAPL34 | 0,0 |
What I'm trying to do is get the values after the "Top 10 Bets" and before the "Botton 10 Bets".
My goal is the following result:
| portfolio_1 | total_risk |
|-------------|------------|
| AAPL34 | 2,06699 |
| DISB34 | 1,712684 |
| PETR4 | 0,753324 |
| PETR3 | 0,087767 |
| VALE3 | 0,086346 |
| LREN3 | 0,055108 |
| AMZO34 | 0,0 |
So, my goal is to take off the "Top 10 Bets", the "Botton 10 Bets" and the AAPL34 after the "Botton 10 Bets", which was repeated.
The quantity of rows is variable (I'm importing it from an Excel file), so I need a loop to do this, right?
SQL tables and result sets represent unordered sets. There is no "before" or "after" unless rows explicitly provide that information.
Let me assume that you have such a column, which I will call id for convenience.
Then you can do this in several ways. Here is one:
select t.*
from t
where t.id > (select min(t2.id) from t t2 where t2.portfolio_1 = 'Top 10 Bets') and
t.id < (select max(t2.id) from t t2 where t2.portfolio_1 = 'Bottom 10 Bets');

Weird ghost records in PostgreSQL - what are they?

I have a very weird issue on our postgresql DB. I have a table called "statement" which has some strange records in it.
Using the command line console psql, I query select * from customer.statement where type in ('QUOTE'); and get 12 rows back. 7 rows look normal, 5 are missing all data except a single column which is a nullable column but seems to hold real values entered by the user. psql tells me that 7 rows were returned even though there are 12. Most of the other columns are not nullable. The weird records look like this:
select * from customer.statement where type = 'QUOTE';
id | issuer_id | recipient_id | recipient_name | recipient_reference | source_statement_id | catalogue_id | reference | issue_date | due_date | description | total | currency | type | tax_level | rounding_mode | status | recall_requested | time_created | time_updated | time_paid
------------------+------------------+------------------+----------------+---------------------+---------------------+--------------+-----------+------------+------------+------------------------------------------------------------------+-----------+----------+-------+-----------+---------------+-----------+------------------+----------------------------+----------------------------+-----------
... 7 valid records removed ...
| | | | | | | | | | Build bulkheads and sheet with plasterboard. +| | | | | | | | | |
| | | | | | | | | | Patch all patches. +| | | | | | | | | |
| | | | | | | | | | Set and sand all joints ready for painting. +| | | | | | | | | |
| | | | | | | | | | Use wall angle on bulkhead in main bedroom. +| | | | | | | | | |
| | | | | | | | | | Build nib and sheet and set in entrance | | | | | | | | | |
(7 rows)
If I run the same query using pgAdmin, I don't see those weird records.
Anyone know what these are?
The plus sign before the separator (+|) indicates a newline character in the displayed string value in psql. So no additional rows, just the same row continued with line breaks. The final line of output in your quote confirms as much: (7 rows).
In pgAdmin you don't see the extra lines as long as you don't increase the height of the field (or copy / paste the content somewhere), but there are multiple lines as well.
Try in psql and in pgAdmin:
test=# SELECT E'This\nis\na\ntest.' AS multi_line, 'foo' AS single_line;
multi_line | single_line
--------------+-------------
This +| foo
is +|
a +|
test. |
(1 row)
The manual about psql:
linestyle
Sets the border line drawing style to one of ascii, old-ascii, or unicode. [...] The default setting is ascii. [...]
ascii style uses plain ASCII characters. Newlines in data are shown using a + symbol in the right-hand margin. [...]

Tableau - Calculated field for difference between date and maximum date in table

I have the following table that I have loaded in Tableau (It has only one column CreatedOnDate)
+-----------------+
| CreatedOnDate |
+-----------------+
| 1/1/2016 |
| 1/2/2016 |
| 1/3/2016 |
| 1/4/2016 |
| 1/5/2016 |
| 1/6/2016 |
| 1/7/2016 |
| 1/8/2016 |
| 1/9/2016 |
| 1/10/2016 |
| 1/11/2016 |
| 1/12/2016 |
| 1/13/2016 |
| 1/14/2016 |
+-----------------+
I want to be able to find the maximum date in the table, compare it with every date in the table and get the difference in days. For the above table, the maximum date in table is 1/14/2016. Every date is compared to 1/14/2016 to find the difference.
Expected Output
+-----------------+------------+
| CreatedOnDate | Difference |
+-----------------+------------+
| 1/1/2016 | 13 |
| 1/2/2016 | 12 |
| 1/3/2016 | 11 |
| 1/4/2016 | 10 |
| 1/5/2016 | 9 |
| 1/6/2016 | 8 |
| 1/7/2016 | 7 |
| 1/8/2016 | 6 |
| 1/9/2016 | 5 |
| 1/10/2016 | 4 |
| 1/11/2016 | 3 |
| 1/12/2016 | 2 |
| 1/13/2016 | 1 |
| 1/14/2016 | 0 |
+-----------------+------------+
My goal is to create this Difference calculated field. I am struggling to find a way to do this using DATEDIFF.
And help would be appreciated!!
woodhead92, this approach would work, but means you have to use table calculations. Much more flexible approach (available since v8) is Level of Details expressions:
First, define a MAX date for the whole dataset with this calculated field called MaxDate LOD:
{FIXED : MAX(CreatedOnDate) }
This will always calculate the maximum date on table (will overwrite filters as well, if you need to reflect them, make sure you add them to context.
Then you can use pretty much the same calculated field, but no need for ATTR or Table Calculations:
DATEDIFF('day', [CreatedOnDate], [MaxDate LOD])
Hope this helps!

Using named fields to determine ranges with vsum in Emacs org-table-mode, impossible?

I have been trying to simplify a semi-complex table that I have by adding named fields, without a problem, until I get to the vsum operator. I had the formula set to $M=vsum($3..#-4) which works, however I am continuously having to add and remove items from those fields, which changes the column numbering. This results in me having to change the field specifications of the vsum range after every update/change. I thus tried naming the top field and bottom fields with the thought of supplying the named variables to vsum, giving me a table similar to the following:
| / | <> | <> |
|---+--------+---------|
| | Title1 | Title 2 |
|---+--------+---------|
| _ | | START |
| | name | 1000 |
| | name | 3456 |
| | name | 123 |
| ^ | | END |
|---+--------+---------|
| _ | | MT |
| # | Total | #ERROR |
| # | | |
|---+--------+---------|
#+TBLFM: $MT=vsum($START..$END)
This is the debug formula output from the above table:
Substitution history of formula
Orig: vsum($START..$END)
$xyz-> vsum((1000)..(123))
#r$c-> vsum((1000)..(123))
$1-> vsum((1000)..(123))
-----------^
Error: Expected `)'
I have tried embrasing the named field variables in parenthesis, and several other ways but have thus far not been able to get this to work. I am hoping I am just missing something and being blind, but perhaps this is not possible to do?
I have also tried the sum-up function with no success as well. Thank you in advance for your assistance.
The following solution works by using #II and #III to refer to all entries between the second and third hline.
| / | <> | <> |
|---+--------+---------|
| | Title1 | Title 2 |
|---+--------+---------|
| | name | 1000 |
| | name | 3456 |
| | name | 123 |
|---+--------+---------|
| _ | | MT |
| # | Total | 4579 |
| # | | |
|---+--------+---------|
#+TBLFM: $MT=vsum(#II..#III)
Documentation: http://orgmode.org/manual/References.html#References