Sql Select Query Issue.

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I have a sql query group by query like this.

SQL

SELECT cusName, cellPerBlock, SUM(block), SUM(cell) FROM [tbCus] GROUP BY cusName, cellPerBlock

But I need a query that will perform like the following code.

C#

if(cell >= cellPerBlock)
{
      block += cell / cellPerBlock;
      cell %= cellPerBlock;
}
while (cell < 0)
{
     cell += cellPerBlock;
     block--;
}

Thank's In advance.

Posted 7-Jan-15 5:30am

sazzad37

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Kumar Pankaj Verma 7-Jan-15 12:33pm

Better way to achive this to create a use defined function and call that in query because you are using loop in the code.

Kschuler 7-Jan-15 16:06pm

The logic you've posted is a bit confusing. Could you include a few examples of data and how you would want them to calculate?

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CodeBane · Answer 1 · 2015-01-07T14:00:00

Umm maybe something like...

SQL

SELECT

    cusName,
    cellPerBlock,
    case when cell >= cellPerBlock then block + (cell / cellPerBlock) when cell < 0 then block - ((floor((cell * -1) / cellPerBlock))*1) else block end 'block',
    case when cell >= cellPerBlock then floor(cell / cellPerBlock) when cell < 0 then cell + (cellPerBlock * ((floor((cell * -1) / cellPerBlock))*1)) else cell end 'cell'

FROM [tbCus]

or if you need the group by clause, use a nested query

SQL

FROM
(
    SELECT cusName, cellPerBlock, SUM(block) 'block', SUM(cell) 'cell' FROM [tbCus] GROUP BY cusName, cellPerBlock
)

Since you said a query, I kept it as one statement.

I replaced the while loop with what I think a mathematical equivalent is. (I had to make some assumptions about your data)

So for the while loop

C#

while (cell < 0)
{
     cell += cellPerBlock;
     block--;
}

cell = -10
cellPerBlock = 2
block = 10

Result: cell = 0, block = 5

In the query,

SQL

when cell < 0 then cell + ((cellPerBlock * ((floor((cell * -1)/ cellPerBlock))*1)) else cell end 'cell'

cell = -10 + (2 * ((-10*-1) % 2)*1) = 0

SQL

when cell < 0 then block - ((floor((cell * -1)/cellPerBlock))*1) else block end 'block'

block = 10 - (((-10*-1) % 2)*1) = 5

The *1 at the end is to handle the event when your while loop would have ran once but my formula would deliver a quotient of 0. I think my brackets and maths is right, not tested it.