I want to generate a random number against StudentID, I am using the following SQL
The Result i am getting is :
Please Help.
You're just setting that column to the column index of the partitioned row_number, which is 1. If you want a random number for each row, it would be easier to do this:
UPDATE TAB_EXAM_FORMS
SET RNO_CODE = CAST(RAND(CHECKSUM(NEWID())) * 10 AS INT) + 1
Just change the multiplication to whatever range you want. This range is 1-10.
Related
I have 2 sheets like this :
In that 2nd sheet, i want to lookup the id (S/M/L/XL) by checking if value is in between the Min value and Max value. So the goal is to have something like that 2nd sheet where in 'level' column, i need to put a formula so it will check the value is between what range so then it will retrieve the correct 'id' from 1st sheet.
the rule is if the value is >= minvalue and < max value
How can i do this ?
Thanks
use:
=INDEX(IF(A9:A="",,VLOOKUP(A9:A, {C2:C5, A2:A5}, 2, 1)))
Your first table, has overlapping values, so I suggest you think better about the rules you want to apply.
For example, 1, according your table can match both "S" and "M" , same for 3, which can be "M" or "L".
Once you have resolved that, you can use the QUERY function.
Example:
=QUERY($A$2:$D$5,
"select A,D where C<="&A2&" AND D >="&A2&" ORDER BY D DESC LIMIT 1 ")
Working solution can be found here:
https://docs.google.com/spreadsheets/d/1oLVwQqihT_df2y_ZQnfx7By77HnKSFz0bcbOzMuWqOM/edit?usp=sharing
Rather than have min and max columns, you could just use one column to list incremental values that determine the next size, and use vlookup() with a sort option of true - this avoids overlapping values:
=arrayformula({"level";if(A2:A<>"",VLOOKUP(A2:A,{Source!C:C,Source!A:A},2,1),)})
when I run the following script:
tbl: update prob: 1?100 from tbl;
I was expecting that I get a new column created with each row having a random number. However, I get back a column containing the same number for all the rows in the table.
How do I resolve this? I need to update my existing table and not create a table from scratch.
When you are using 1?100 you are only requesting 1 random value within the range of 0-100. If you use 10?100, you will be returned a list of 10 random values between 0-100.
So to do this in an update you want to use something like this
tbl:([]time:5?.z.p;sym:5?`3;price:5?10f;qty:5?10)
time sym price qty
-----------------------------------------------
2012.02.19D18:34:27.148501760 gkn 8.376952 9
2008.07.29D20:23:13.601434560 odo 7.041609 3
2007.02.07D08:17:59.482332864 pbl 0.955069 9
2001.04.27D03:36:44.475531384 aph 1.127308 2
2010.03.03D03:35:55.253069888 mgi 0.7663449 6
update r:abs count[i]?0h from tbl
time sym price qty r
-----------------------------------------------------
2012.02.19D18:34:27.148501760 gkn 8.376952 9 23885
2008.07.29D20:23:13.601434560 odo 7.041609 3 19312
2007.02.07D08:17:59.482332864 pbl 0.955069 9 10372
2001.04.27D03:36:44.475531384 aph 1.127308 2 25281
2010.03.03D03:35:55.253069888 mgi 0.7663449 6 27503
Note that I am using type short and abs to return positive values.
You need to seed your initial data, using something like rand(time), otherwise it will use the same seed, and thus, give the same sequence of random numbers.
EDIT: Per https://code.kx.com/wiki/Reference/SystemCommands
Use \S?n, where n is any integer.
EDIT2: Check out https://code.kx.com/wiki/Reference/SystemCommands#.5CS_.5Bn.5D_-_random_seed for how to use random numbers, please.
Just generate as many random numbers as you have rows using count tbl:
First create your table tbl:
tbl:([]date:reverse .z.d-til 100;price:sums 100?1f)
date price
--------------------
2018.04.26 0.2426471
2018.04.27 0.6163571
2018.04.28 1.179559
..
Then add a column of random numbers between 0 and 100:
update rdn:(count tbl)?100 from tbl
date price rdn
------------------------
2018.04.26 0.2426471 25
2018.04.27 0.6163571 33
2018.04.28 1.179559 13
..
I have an amount field which is decimal(13,5) in SQl Server.
So it takes values like 22.23456 (5 values after decimals)
Now i want to limit the decimal places based on condition like below:
for 22.23456, result should be 22.24
for 22.20001, result should be 22.21
for 22.20000, result should be 22.20
for 22.00000, result should be 22.00
So if there is any number other than 0 after 2nd decimal place(in 1st ex:4),just increase the value 2nd decimal value by 1.(22.2345 to 22.24)
Is there any function or do we need to use length type functions to achieve this?
Please help.
Thanks in advance.
Since you want the highest value in the hundredths position using standard rounding will not work. You can however use a little math and CEILING to accomplish.
with MyValues(SomeValue) as
(
select 22.23456 union all
select 22.20001 union all
select 22.20000 union all
select 22.00000
)
select cast(ceiling(SomeValue * 100) / 100. as numeric(9,2)) as MyResult
from MyValues
https://msdn.microsoft.com/en-us/library/ms189818.aspx
I'm new to SQL Server so I apologize if my question seems too easy. I tried finding and answer on my own, but I'm failing miserably. I am trying to create a query which will return total size on the drive of each row in the table.
i thought about using dbcc showconting but it doesn't work for varchar(max) which appears in my table. Also, it doesn't return size for each row, but rather the average, max and min size. My reading so far suggests that it is not possible to get query that could show the size of each individual row in the table so I decided to settle for the total length of all characters in each column in each row. Indirectly it will give me idea about the size of each row.
I have a table with some varchar(500) and varchar(max) columns. I noticed that some of the rows are a lot bigger than others.
What I need is top 1000 longest rows in the table, preferably in an output showing two columns:
Column 1 showing EntryID
Column 2 showing total length of the characters in all columns together for that record (eg total length of the characters in the column 1 + total length of the characters in the column 2 + column3 + column4 etc...) It would be great if this could be aliased RowLength.
What I tried so far is:
SELECT TOP 1000
(LEN(columnname1) + LEN(columnname2) + LEN(columnname3) + LEN(columnname4)) as RowLength,
FROM dbo.tablename
ORDER BY Length Desc
It works, but it doesn't show entry ID corresponding to the total length of all characters in the row. How do I add it?
It also doesn't show the alias for the column showing number of characters in the row.
Could you please suggest how I can change the query to get the expected outcome? I'll be very grateful for any suggestions.
it doesn't show EntryID corresponding to the total length of all
characters in the row. It also doesn't show the alias for the column
showing number of characters in the row.
You have not specified an alias, so what should it show? You also haven't selected EntryID. If you want the longest 1000 rows you have to order by the length:
SELECT TOP 1000
EntryID,
Length = LEN(columnname1) + LEN(columnname2) + LEN(columnname3) + LEN(columnname4)
FROM dbo.tablename
ORDER BY Length DESC
SELECT TOP 1000 EntryID,
(LEN(columnname1) + LEN(columnname2) + LEN(columnname3) + LEN(columnname4)) AS RowLength,
FROM dbo.tablename
ORDER BY EntryID
I have variable
Dim s As String = "1,5,20,22,28,31,40"
And I have records in (fieldnum) database (mssql) :
3,5,19,20,26,28,33,40
1,2,5,18,20,22,31,38
1,7,12,22,23,24,31
Now, how to find (SELECT ...???) records where at least 4 numbers in fieldnum are equal with numbers s variable?
In this example must be selected only those two rows.
3,5,19,20,26,28,33,40 (equal numbers: 5,20,28,40 = 4 nums)
1,2,5,18,20,22,31,38 (euqal numbers: 1,5,20,22,31 = 5 nums)
It is not going to recognize them as seperate numbers. You could trying using a LIKE search in your sql statement though.