Basically I have 3 columns, like this:
+-------------+-------------+--------+
| startpoint | endpoint | number |
+-------------+-------------+--------+
| 15037232632 | 4226861620 | null |
| 4226862003 | 4226862079 | null |
| 4226862079 | 4226862111 | null |
| 4226862111 | 4226862121 | 2 |
| 4226862121 | ---------- | 1 |
| 15025374738 | 4226862003 | null |
| 4226861620 | 15025374738 | null |
| 4226801794 | 15037232632 | null |
+-------------+-------------+--------+
What I am trying to do is:
Step 1 : I assign a number '1' to any one of the IDs from the 'startpoint' column
Step 2 : Match the 'startpoint' ID to which I assigned the number in the previous step with the IDs in the 'endpoint' column
Step 3 : After the 'startpoint' ID matches with the 'endpoint' ID, I assign the number 2 in the 'number' column on the ROW where the endpoint matched
Step 4: On the row where number was assigned, I take the 'startpoint' ID and then repeat the steps 2-4 again.
I have tried playing around with the update query but it doesn't seem right. Any help would be appreciated.
EDIT:
I am also including the expected output. The table without applying any queries is given above
+-------------+-------------+--------+
| startpoint | endpoint | number |
+-------------+-------------+--------+
| 15037232632 | 4226861620 | 7 |
| 4226862003 | 4226862079 | 4 |
| 4226862079 | 4226862111 | 3 |
| 4226862111 | 4226862121 | 2 |
| 4226862121 | ---------- | 1 |
| 15025374738 | 4226862003 | 5 |
| 4226861620 | 15025374738 | 6 |
| 4226801794 | 15037232632 | 8 |
+-------------+-------------+--------+
Related
I have a table with different fields like this:
+----+-------------------+------+--------+
| id | Name | phone| Date |
+----+-------------------+------+--------+
| | | | |
| | | | |
| | | | |
| | | | |
| | | | |
| | | | |
| | | | |
+----+-------------------+------+--------+
I entered a number of phone number lines like:
+----+-------------------+------+--------+
| id | Name | phone| Date |
+----+-------------------+------+--------+
| 1 | |563824| |
| 2 | |525225| |
| 3 | |546542| |
| 4 | |464625| |
| 5 | |654525| |
| 6 | |849842| |
| 7 | |654446| |
+----+-------------------+------+--------+
Ok now I have phone data and Id of rows. Now My problem what I try to do I need to insert multiple names in Column Name at one time. Insert this names like update to multiple rows at one time but between specific id.
example I need to update rows from Id 3 to 5 to can insert names:
+----+-------------------+------+--------+
| id | Name | phone| Date |
+----+-------------------+------+--------+
| 1 | |563824| |
| 2 | |525225| |
| 3 | Ali |546542| |
| 4 | Ahmad |464625| |
| 5 | Marwan |654525| |
| 6 | |849842| |
| 7 | |654446| |
+----+-------------------+------+--------+
How I can do that? Any idea to do that ?I need to insert data from MySQL (Run SQL query/queries on table)
The names are in brackets because I am converting the data from an excel file to the Mr. Data Converter example: ('Marwan'),('Ali'),('Jake').
You can just add WHERE condition to specify which row you want to update.
Also, since the rows are already existing, you have to use UPDATE instead of INSERT INTO.
Example:
UPDATE employ SET name = 'Ali' WHERE id >= 3 and id <= 5;
This will update the name of all the rows with id between 3 and 5.
If you want to update multiple rows with specific ids, you can try this:
UPDATE employ SET name = 'Ali' WHERE id IN (3,4,5,8,11);
I'm trying to break up a SQL table that needs to take a users name and find the unique user ID's from up to 4 systems.
The data is currently like this:
| Name | User_ID |
-----------------
| A | 10 |
| A | 110 |
| A | 1500 |
| A | 4 |
| B | 20 |
| B | 100 |
| B | 2 |
| C | 10 |
I need to pivot it around the user's name to look like this (the id's don't need to be in numerical order as the SYS#_ID for each doesn't matter):
| Name | SYS1_ID | SYS2_ID | SYS3_ID | SYS4_ID |
------------------------------------------------
| A | 4 | 10 | 110 | 1500 |
| B | 2 | 20 | 100 | NULL |
| C | 10 | NULL | NULL | NULL |
This is the code I have tried on MySQL:
PIVOT(
COUNT(User_ID)
FOR Name
IN (SYS1_ID, SYS2_ID, SYS3_ID, SYS4_ID)
)
AS PivotedUsers
ORDER BY PivotedUsers.User_Name;
I'm unsure if PIVOT works on MySQL as I keep getting an error "PIVOT unknown". Is there a way to find the values that each user has and if they do not appear in the table already add them to the next column with a max of 4 values?
I have two tables similar to these (t_stamp would normally be a DATETIME, abbreviated here for clarity):
datapoints
+------+---------+----+---------+
| ndx | value | ID | t_stamp |
+------+---------+----+---------+
| 1 | 503.42 | 1 | 3/1/15 |
| 2 | 17.81 | 2 | 3/1/15 |
| 4 | 498.21 | 1 | 3/2/15 |
| 4 | 19.51 | 2 | 3/2/15 |
+------+---------+----+---------+
parameters
+------+----+---------------+-------+
| ndx | ID | description | unit |
+------+----+---------------+-------+
| 1 | 1 | wetwell level | ft |
| 2 | 2 | effluent flow | MGD |
+------+----+---------------+-------+
I'm looking to combine them so that the descriptions become column headers and list the values in order of time stamp, end result looking something like this:
new table
+---------+---------------+---------------+
| t_stamp | wetwell level | effluent flow |
+---------+---------------+---------------+
| 3/1/15 | 503.42 | 17.81 |
| 3/2/15 | 498.21 | 19.51 |
+---------+---------------+---------------+
Bearing in mind, I have considerably more rows in each table so I'm looking for something dynamic. It could be query or stored procedure based. Thank you for any help!
In my access database, we keep track of two sets of dates. One set is for date of membership dues payments, the other set is date of other contributions (a non-membership donation.) There are multiple dates for each person depending on number of payments made for each type.
Example:
+----+---------------+---------------+
| ID | Dues_Date | Cont_Date |
+----+---------------+---------------+
| 1 | 01/01/15 | 09/12/11 |
| | 01/01/14 | |
| | 01/01/13 | |
| 2 | 07/30/14 | 06/20/13 |
| | | 11/12/11 |
+----+---------------+---------------+
First I needed to know the most recent payment for each of the two fields so I ran a query that tells me the MAX (most recent) date for each field.
Example Query:
+----+---------------+---------------+
| ID | Max Dues_Date | Max Cont_Date |
+----+---------------+---------------+
| 1 | 01/01/15 | 09/12/11 |
| 2 | 07/30/14 | 06/20/13 |
| 3 | 02/11/13 | 09/16/14 |
| 4 | 07/30/12 | 06/20/11 |
| 5 | 12/13/13 | 11/12/14 |
+----+---------------+---------------+
Now I need a third field in the same query to compare the results of the first two fields and show which is the MAX of those two.
I have column 2 and 3 in the query; how can I take that and create column 4 in the same query?
Example Query:
+----+---------------+---------------+-----------------+
| ID | Max Dues_Date | Max Cont_Date | Max Date(DD&CD) |
+----+---------------+---------------+-----------------+
| 1 | 01/01/15 | 09/12/11 | 01/01/15 |
| 2 | 07/30/14 | 06/20/13 | 07/30/14 |
| 3 | 02/11/13 | 09/16/14 | 09/16/14 |
| 4 | 07/30/12 | 06/20/11 | 07/30/12 |
| 5 | 12/13/13 | 11/12/14 | 11/12/14 |
+----+---------------+---------------+-----------------+
Try adapting this to your own scenario:
SELECT tblTest.DueDate, tblTest.ContDate, [DueDate]-[ContDate] AS Test, IIf([Test]<0,[ContDate],[DueDate]) AS MaxRes
FROM tblTest;
"Test" finds which is the later date, ContDate or Due Date. The IIf statement selects the later date.
Does this help?
I've the following table:
| id | Name | Date of Birth | Date of Death | Result |
| 1 | John | 3546565 | 3548987 | |
| 2 | Mary | 5233654 | 5265458 | |
| 3 | Lewis| 6546876 | 6548752 | |
| 4 | Mark | 6546546 | 6767767 | |
| 5 | Steve| 6546877 | 6548798 | |
And I need to do this for the whole table:
Result = 1, if( current_row(Date of Birth) - row_above_current_row(Date of Death))>X else 0
To make things easier, I guess, I created the same table above but with 2 extra id fields: id_minus_one and id_plus_one
Like this:
| id | id_minus_one | id_plus_one |Name | Date_of_Birth | Date_of_Death | Result |
| 1 | 0 | 2 |John | 3546565 | 3548987 | |
| 2 | 1 | 3 |Mary | 5233654 | 5265458 | |
| 3 | 2 | 4 |Lewis| 6546876 | 6548752 | |
| 4 | 3 | 5 |Mark | 6546546 | 6767767 | |
| 5 | 4 | 6 |Steve| 6546877 | 6548798 | |
So my approach would be something like (in pseudo code):
for id=1, ignore result. (Because there is no row above)
for id=2, Result = 1 if( (Where id=2).Date_of_Birth - (where id_minus_one=id-1).Date_of_Death )>X else 0
for id=3, Result = 1 if( (Where id=3).Date_of_Birth - (where id_minus_one=id-1).Date_of_Death)>X else 0
and so on for the whole table...
Just ignore id_plus_one if there is no need for it, I'll use it later for the same thing. So, if I manage to do this for id_minus_one I'll manage for id_plus_one as they are the same algorithm.
My question is how to pass that pseudo code into SQL code, I can't find a way to relate both ids in just one select.
Thank you!
As you describe this, it is just a self join with some logic on the select:
select t.*,
((t.date_of_birth - tprev.date_of_death) > x) as flag
from t left outer join
t tprev
on t.id_minus_one = tprev.id