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hi,
I want to have fields in MySQL such as is_administrator, is_active, is_blocked which will be true or false, yes or no, negative or positive, or whatever name you'll use for it..
I would like to ask what's the best field type to use for such requirment?
Thanks,
Jassim
Technology News @ www.JassimRahma.com
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Depends on your version.
But I'd suggest bool, bit or tinyint, depending on availability in your version.
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Jassim Rahma wrote: I would like to ask what's the best field type to use for such requirment?
What's the reason you're asking?
In MySQL[^], TINYINT(1) = BOOLEAN = BIT
A value of zero is considered false. Nonzero values are considered true.
Bastard Programmer from Hell 
If you can't read my code, try converting it here[^]
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Hi All,
I want to use Non in on two columns like for example I am importing Prod Cost from some history table of xml imports (example Orders table). For that what am I doing is, taking the values from Orders table in to Temporary table which have to be imported. Then I am planning to import the values from this Temp table into our ProdCost table, which do not exist for in ProdCost table for the year as well.
Like I want to use Select * from #Temp Where (year, ProdId) not in (Select Year, ProdId from ProdCost). Is there any way to do this in SQL Server?
Thanks & Regards,
Abdul Aleem Mohammad
St Louis MO - USA
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Try this where clause.
Where not exists (Select * from ProdCost where Year = #Temp.Year and ProdID = #Temp.ProdID)
Never underestimate the power of human stupidity
RAH
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hi
i have written 3 different select query in mysql based on yesterday,today, tommorow dates to get the birthday details as follows
select concat(name,', ',title) as 'Yesterday 30-04-2014' from personal_details where DOB=curdate() - interval 1 day
select concat(name,', ',title) as 'Today 01-05-2014' from personal_details where DOB=DATE(NOW())
select concat(name,', ',title) as 'Tommorow 02-05-2014' from personal_details where DOB=curdate() + interval 1 day
how to join all 3 query results to one, i need to show as below
Yesterday Today Tomorrow
aaaa gggg nnnnn
bbbb hhhhh mmmm
dddd jjjjj
eeee
ffff
How to achieve this, i am not able to do.
If i tried with join there it wont match any condition and will not work because in each query result i will get unique values.
I tried with another query by putting as below
select a.* from (select CASE DOB WHEN (curdate() - interval 1 day) THEN concat(name,', ',title) ELSE '' END AS 'Yesterday', CASE DOB WHEN (DATE(NOW())) THEN concat(name,', ',title) ELSE '' END AS 'Today',CASE DOB WHEN (curdate() + interval 1 day) THEN concat(name,', ',title) ELSE '' END AS 'Tomorrow' from personal_details ) as a where a.Yesterday IS NOT NULL and a.Today IS NOT NULL and a.Tomorrow IS NOT NULL
It is showing the result like in all the three column some rows will be null
I dont want null values in any column. i want out as above.
How to achieve this. If anybody knows please reply me.
Thanks in advance.
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Firstly to add your 3 queries together to act as a single result set you should look into the UNION[^] keyword.
To organise the layout so that the column headers become Yesterday, Today and Tomorrow you need to look into PIVOT[^] this example should show you how to create one.
Every day, thousands of innocent plants are killed by vegetarians.
Help end the violence EAT BACON
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if i use UNION i will get one column result. I should get 3 column but without null values.
How to achieve this
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how to fetch a table column of same name of more than 4 different database in sql server 2008r2???
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When you create a complex SQL query with a large number of joins you may get into the problem of same column names in different tables. To assign a name of your choice to any of the returned columns you may use the format of
table.field as my_field_name
It is irrelevant from where the tables are as long as you can link to those databases - do you have problem there?
I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is. (V)
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I'm working on an application for a joint-stock company.
A joint-stock company is a business entity which is owned by shareholders. Each shareholder owns the portion of the company in proportion to his or her ownership of the company's shares (certificates of ownership). This allows for the unequal ownership of a business with some shareholders owning a larger proportion of a company than others. Shareholders are able to transfer their shares to others without any effects to the continued existence of the company.
Shares are collected in a form of a deed. A deed has classes like a deed of 50, a deed of 40 and so on.
50 and 40 means that a deed consists of 50 shares, 40 shares and so on.
A joint-stock company may have a 1000 shares that are distributed in the form of deeds. each deed has a start share number and an end share number for example lets take a deed of 50 shares so its shares will start from share no. 1 to share no. 50.
Within the database of the company there is a table to store the information of each deed
DEED (DEED_NUMBER, START_SHARE, END_SHARE) if we use the previous example of deed of 50 and lets say that the deed number is 100. So the data will become 100 for DEED_NUMBER, 1 for START_SHARE, and 50 for END_SHARE.
What I need is to get all the numbers between 1 and 50 and this will be applied to all the deeds. So if I had a 1000 shares distributed in deeds I need to get the numbers 1, 2, 3, 4, .... 1000.
I already used a cursor to make such solution through looping on all deeds one at a time getting its start share number and its end share number and get all the numbers between them. However, this solution taking too much time and with a company like the one I'm working on having more than 100,000 to 150,000 deeds the time my solution takes to retrieve shares numbers is unbearable and unacceptable.
Thanks for any help and I'm sorry for long post I just wanted to explain what is the mean of joint-stock company so people know what I want.
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Since a physical number isn't assigned to a deed, you probably don't really need the type of solution you are looking at. What you probably want is to say, "What deed has stock #501?" You can quickly get that from a simple DB query, if all of the stocks are put in with first and last stock numbers. Something like Select deed from deeds where START_SHARE <= number AND END_SHARE >= number. Sorry that probably isn't the exact syntax - it's been a while since I worked with a DB. But it might get you started.
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I need to show the user all numbers of shares he has within his organization. He will use such shares numbers in viewing a report for people who has for example shares lies between share number 20 and share number 350, he will need to know who are the people owns those shares. I hope my idea become more clearer 
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You haven't said anything that makes me think you REALLY need a master list of every single share, and who owns them. You can query the DB for all the deeds within a range, and then create a list from there in a relatively simple fashion. Good luck with the problem!
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Assuming you have 3 tables DEED, SHARE, OWNER (although if it is badly designed there may not be an owner table).
Select (put in the fields from the 3 table you want to display and a count(*))
from Deed
inner join Share on Deed.deedno = share.deedno
inner join Owner on Owner.OwnerNo = Share.OwnerNo
where ?
group by (put in the display fields)
Never underestimate the power of human stupidity
RAH
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There is no table for shares. I have only a table for deeds and this table consists of 4 columns (DEED_ID 'identity', DEED_NUMBER, START_SHARE, END_SHARE). For example if we have a deed consists of a 50 shares the values in these columns will be (1, 100, 1, 50) for DEED_ID, DEED_NUMBER, START_SHARE and END_SHARE respectively. What I need is to get all shares numbers, more clearer, if we apply on the above example of a deed of 50 shares starting for share number 1 to share number 50 I need to get the values 1, 2, 3, 4, 5 ..... 50. I need to do that for all deeds I have within my database. So if I have 150,000 deeds each of which consists of 50 shares. then I have 150,000 * 50 = 7500000 shares. I need to get values starting from 1 up to 7500000. I already make a solution by using a cursor for all deeds, getting each deed separately and then getting its start and end share numbers then making a while loop from the start share number to the end share number of that deed, then get the next deed and so on. However, this solution taking a considerable amount of time to load the the shares values and this time is unacceptable.
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So it is a badly designed table, damn.
As David asked why do you need the individual records, what are you going to do with 7.5m records now that you have them!
Never underestimate the power of human stupidity
RAH
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The client needs to see all the shares he has within a DataGridView, then he can select from these DataGridView two share numbers one as a start share number and another as end share number to get all shareholders data who own shares within the range of the share numbers selected from the DataGridView. Lets say that client select 20 as from share number and 5000 as to share number, so the client now needs to see shareholders information who own shares within the range 20 to 5000. I hope you understand what I want
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How are the tables defined? That might help us defining a solution.
there are some assumptions we could make like is the share id unique? are they sequential? etc...
However let's get a few things straight.
- Looping a resultset to check for results is not a very good idea and will be slow.
- Returning a million records let's say will be slow, no matter what. Even if your database could build the resultset in milliseconds it still needs to send that data through a wire somehow. (that's why they invented paging  ) IOW if you can improve the queries, you might still be in trouble and in need of an alternate solution.
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There is no table for shares. There is only a table for deeds and this table structure or what is important to us in this table are 3 columns Deed_NUMBER, START_SHARE and END_SHARE respectively. DEED_NUMBER including the number of the deed, START_SHARE including the value of the start share number within a deed and END_SHARE including the value of the end share number within a deed. Let's say that we have a deed containing 50 shares and that deed number is 100. So the values in the 3 columns will be 100 for DEED_NUMBER, 1 for START_SHARE, and 50 for END_SHARE. I hope this explanation will help
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so basically you have this?
DEED_NR START_SHARE END_SHARE
1 1 50
2 1 25
3 1 75
If you need get them out the result should be 1 - 150.
If that´s the case you could use the SUM function:
Select sum(END_SHARE) from DEEDS
if your START_SHARE = END_SHARE+1 (1-49, 50-74, 75-154 eg) of the previous record you just need to select that last record of the deed containing the shares.
Select END_SHARE from DEEDS HAVING DEED_NR = max(DEED_NR)
hope this gives you an idea.
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Amr Muhammed wrote: more than 100,000 to 150,000 deeds the time my solution takes to retrieve shares numbers
So you are going to be returning at a minimum 100,000 rows. And more than likely you are going to be returning more like 10 million rows.
So exactly what is going to be using those 10 million rows or even 100,000? Certainly won't be a human.
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That is what the client want and I'm at the client service 
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I hear that line all the time, accepting it is just plain lazy, you are not doing your client a service unless you investigate the requirement and see if you can meet that requirement closer to their needs. They almost never understand their own needs from a data/IT perspective, that is your job to interpret their need and supply it. Delivering 7.5m records is almost certainly not doing that.
Never underestimate the power of human stupidity
RAH
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The client needs to see all the shares he has within a DataGridView, then he can select from these DataGridView two share numbers one as a start share number and another as end share number to get all shareholders data who own shares within the range of the share numbers selected from the DataGridView. Lets say that client select 20 as from share number and 5000 as to share number, so the client now needs to see shareholders information who own shares within the range 20 to 5000. I hope you understand what I want
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